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Resolves #45.

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Addressed not being able to use the DUE on bit bang I2C.
This commit is contained in:
fmalpartida
2015-09-20 13:38:02 +02:00
parent d51e8893d4
commit c1e7f9bdc0
48 changed files with 566 additions and 537 deletions
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I2CIO.cpp
+8 -3
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@@ -25,14 +25,19 @@
// @author F. Malpartida - fmalpartida@gmail.com
// ---------------------------------------------------------------------------
#if (ARDUINO < 100)
#include <WProgram.h>
#include <WProgram.h>
#else
#include <Arduino.h>
#include <Arduino.h>
#endif
#if (ARDUINO < 10000)
#include <../Wire/Wire.h>
#else
#include <Wire.h>
#endif
#include <inttypes.h>
#include <../Wire/Wire.h>
#include "I2CIO.h"
LiquidCrystal_I2C_ByVac.h
+5 -1
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@@ -30,7 +30,11 @@
#include <inttypes.h>
#include <Print.h>
#include <../Wire/Wire.h>
#if (ARDUINO < 10000)
#include <../Wire/Wire.h>
#else
#include <Wire.h>
#endif
#include "LCD.h"
SI2CIO.cpp
+4
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@@ -46,6 +46,7 @@
#define SDA_PIN 1
#define SDA_PORT PORTB
#if defined (__AVR__)
#include "SI2CIO.h"
#include "SoftI2CMaster.h"
@@ -204,3 +205,6 @@ int SI2CIO::digitalWrite ( uint8_t pin, uint8_t level )
//
// PRIVATE METHODS
// ---------------------------------------------------------------------------
#else
#error "ONLY SUPPORTED ON AVR PROCESSORS"
#endif // __AVR__
SoftI2CMaster.h
+6
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@@ -58,6 +58,8 @@
#ifndef _SOFTI2C_H
#define _SOFTI2C_H 1
#if defined (__AVR__)
// Init function. Needs to be called once in the beginning.
// Returns false if SDA or SCL are low, which probably means
// a I2C bus lockup or that the lines are not pulled up.
@@ -503,6 +505,10 @@ uint8_t i2c_read(bool last)
return ' '; // fool the compiler!
}
#else
#error "ONLY SUPPORTED ON AVR PROCESSORS"
#endif // defined (__AVR__)
#endif
utility/docs/html/_fast_i_o_8h_source.html
+1 -1
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@@ -24,7 +24,7 @@
<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
utility/docs/html/_i2_c_i_o_8h_source.html
+9 -9
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@@ -24,7 +24,7 @@
<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
@@ -152,14 +152,14 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160;</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="class_i2_c_i_o_html"><div class="ttname"><a href="class_i2_c_i_o.html">I2CIO</a></div><div class="ttdef"><b>Definition:</b> I2CIO.h:41</div></div>
<div class="ttc" id="class_i2_c_i_o_html_a0341888753bc54c4384f5593a870fb34"><div class="ttname"><a href="class_i2_c_i_o.html#a0341888753bc54c4384f5593a870fb34">I2CIO::portMode</a></div><div class="ttdeci">void portMode(uint8_t dir)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:98</div></div>
<div class="ttc" id="class_i2_c_i_o_html_ae2063569c927d0008e2593d14504fdcd"><div class="ttname"><a href="class_i2_c_i_o.html#ae2063569c927d0008e2593d14504fdcd">I2CIO::write</a></div><div class="ttdeci">int write(uint8_t value)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:135</div></div>
<div class="ttc" id="class_i2_c_i_o_html_a53b94274eb6bb68564cf5243323db887"><div class="ttname"><a href="class_i2_c_i_o.html#a53b94274eb6bb68564cf5243323db887">I2CIO::pinMode</a></div><div class="ttdeci">void pinMode(uint8_t pin, uint8_t dir)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:81</div></div>
<div class="ttc" id="class_i2_c_i_o_html_a473206162522b847546777d16a7c6dcd"><div class="ttname"><a href="class_i2_c_i_o.html#a473206162522b847546777d16a7c6dcd">I2CIO::digitalWrite</a></div><div class="ttdeci">int digitalWrite(uint8_t pin, uint8_t level)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:175</div></div>
<div class="ttc" id="class_i2_c_i_o_html_ac26221011a8b49bcea9ef62712ea88a7"><div class="ttname"><a href="class_i2_c_i_o.html#ac26221011a8b49bcea9ef62712ea88a7">I2CIO::digitalRead</a></div><div class="ttdeci">uint8_t digitalRead(uint8_t pin)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:158</div></div>
<div class="ttc" id="class_i2_c_i_o_html_a32eb7832075ad6011d67874405a0d0a6"><div class="ttname"><a href="class_i2_c_i_o.html#a32eb7832075ad6011d67874405a0d0a6">I2CIO::I2CIO</a></div><div class="ttdeci">I2CIO()</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:46</div></div>
<div class="ttc" id="class_i2_c_i_o_html_a6f814653d903dc2ff6e8420eeb7954ae"><div class="ttname"><a href="class_i2_c_i_o.html#a6f814653d903dc2ff6e8420eeb7954ae">I2CIO::begin</a></div><div class="ttdeci">int begin(uint8_t i2cAddr)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:60</div></div>
<div class="ttc" id="class_i2_c_i_o_html_a7a3db7bfc15ede0ae9e8c8bd44290ef7"><div class="ttname"><a href="class_i2_c_i_o.html#a7a3db7bfc15ede0ae9e8c8bd44290ef7">I2CIO::read</a></div><div class="ttdeci">uint8_t read(void)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:116</div></div>
<div class="ttc" id="class_i2_c_i_o_html_a0341888753bc54c4384f5593a870fb34"><div class="ttname"><a href="class_i2_c_i_o.html#a0341888753bc54c4384f5593a870fb34">I2CIO::portMode</a></div><div class="ttdeci">void portMode(uint8_t dir)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:103</div></div>
<div class="ttc" id="class_i2_c_i_o_html_ae2063569c927d0008e2593d14504fdcd"><div class="ttname"><a href="class_i2_c_i_o.html#ae2063569c927d0008e2593d14504fdcd">I2CIO::write</a></div><div class="ttdeci">int write(uint8_t value)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:140</div></div>
<div class="ttc" id="class_i2_c_i_o_html_a53b94274eb6bb68564cf5243323db887"><div class="ttname"><a href="class_i2_c_i_o.html#a53b94274eb6bb68564cf5243323db887">I2CIO::pinMode</a></div><div class="ttdeci">void pinMode(uint8_t pin, uint8_t dir)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:86</div></div>
<div class="ttc" id="class_i2_c_i_o_html_a473206162522b847546777d16a7c6dcd"><div class="ttname"><a href="class_i2_c_i_o.html#a473206162522b847546777d16a7c6dcd">I2CIO::digitalWrite</a></div><div class="ttdeci">int digitalWrite(uint8_t pin, uint8_t level)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:180</div></div>
<div class="ttc" id="class_i2_c_i_o_html_ac26221011a8b49bcea9ef62712ea88a7"><div class="ttname"><a href="class_i2_c_i_o.html#ac26221011a8b49bcea9ef62712ea88a7">I2CIO::digitalRead</a></div><div class="ttdeci">uint8_t digitalRead(uint8_t pin)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:163</div></div>
<div class="ttc" id="class_i2_c_i_o_html_a32eb7832075ad6011d67874405a0d0a6"><div class="ttname"><a href="class_i2_c_i_o.html#a32eb7832075ad6011d67874405a0d0a6">I2CIO::I2CIO</a></div><div class="ttdeci">I2CIO()</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:51</div></div>
<div class="ttc" id="class_i2_c_i_o_html_a6f814653d903dc2ff6e8420eeb7954ae"><div class="ttname"><a href="class_i2_c_i_o.html#a6f814653d903dc2ff6e8420eeb7954ae">I2CIO::begin</a></div><div class="ttdeci">int begin(uint8_t i2cAddr)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:65</div></div>
<div class="ttc" id="class_i2_c_i_o_html_a7a3db7bfc15ede0ae9e8c8bd44290ef7"><div class="ttname"><a href="class_i2_c_i_o.html#a7a3db7bfc15ede0ae9e8c8bd44290ef7">I2CIO::read</a></div><div class="ttdeci">uint8_t read(void)</div><div class="ttdef"><b>Definition:</b> I2CIO.cpp:121</div></div>
</div><!-- fragment --></div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
utility/docs/html/_l_c_d_8h_source.html
+1 -1
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@@ -24,7 +24,7 @@
<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
utility/docs/html/_liquid_crystal_8h_source.html
+1 -1
View File
@@ -24,7 +24,7 @@
<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
utility/docs/html/_liquid_crystal___i2_c_8h_source.html
+1 -1
View File
@@ -24,7 +24,7 @@
<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
utility/docs/html/_liquid_crystal___i2_c___by_vac_8h_source.html
+34 -30
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@@ -24,7 +24,7 @@
<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
@@ -118,36 +118,40 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="preprocessor">#include &lt;inttypes.h&gt;</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="preprocessor">#include &lt;Print.h&gt;</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="preprocessor">#include &lt;../Wire/Wire.h&gt;</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="preprocessor">#include &quot;LCD.h&quot;</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;</div>
<div class="line"><a name="l00037"></a><span class="lineno"><a class="line" href="class_liquid_crystal___i2_c___by_vac.html"> 37</a></span>&#160;<span class="keyword">class </span><a class="code" href="class_liquid_crystal___i2_c___by_vac.html">LiquidCrystal_I2C_ByVac</a> : <span class="keyword">public</span> <a class="code" href="class_l_c_d.html">LCD</a> </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;{</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <a class="code" href="class_liquid_crystal___i2_c___by_vac.html#a29c027cc8bfa78bb8d9ff3124fe83a31">LiquidCrystal_I2C_ByVac</a> (uint8_t lcd_Addr);</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="class_liquid_crystal___i2_c___by_vac.html#a34ce9cf919b9f8de59f842a4e94c1abb">begin</a>(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS);</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="class_liquid_crystal___i2_c___by_vac.html#a9e64cc68ec5df1a0fa421a242239b1b1">send</a>(uint8_t value, uint8_t mode);</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keywordtype">void</span> <a class="code" href="class_liquid_crystal___i2_c___by_vac.html#a9b16e6ce123e2ebe3a3e33b2306e66a7">setBacklight</a> ( uint8_t value );</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; </div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <span class="keywordtype">void</span> <a class="code" href="class_liquid_crystal___i2_c___by_vac.html#a53c79a20e8d21d2c3bc9e6d0dfc79cb4">setContrast</a> ( uint8_t value );</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; </div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; <span class="keywordtype">int</span> init();</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; </div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; uint8_t _Addr; <span class="comment">// I2C Address of the IO expander</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; </div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160;};</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="preprocessor">#if (ARDUINO &lt; 10000)</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="preprocessor"> #include &lt;../Wire/Wire.h&gt;</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="preprocessor"> #include &lt;Wire.h&gt;</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="preprocessor">#include &quot;LCD.h&quot;</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;</div>
<div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="class_liquid_crystal___i2_c___by_vac.html"> 41</a></span>&#160;<span class="keyword">class </span><a class="code" href="class_liquid_crystal___i2_c___by_vac.html">LiquidCrystal_I2C_ByVac</a> : <span class="keyword">public</span> <a class="code" href="class_l_c_d.html">LCD</a> </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;{</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <a class="code" href="class_liquid_crystal___i2_c___by_vac.html#a29c027cc8bfa78bb8d9ff3124fe83a31">LiquidCrystal_I2C_ByVac</a> (uint8_t lcd_Addr);</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="class_liquid_crystal___i2_c___by_vac.html#a34ce9cf919b9f8de59f842a4e94c1abb">begin</a>(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS);</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; </div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="class_liquid_crystal___i2_c___by_vac.html#a9e64cc68ec5df1a0fa421a242239b1b1">send</a>(uint8_t value, uint8_t mode);</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; </div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; </div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="keywordtype">void</span> <a class="code" href="class_liquid_crystal___i2_c___by_vac.html#a9b16e6ce123e2ebe3a3e33b2306e66a7">setBacklight</a> ( uint8_t value );</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; </div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <span class="keywordtype">void</span> <a class="code" href="class_liquid_crystal___i2_c___by_vac.html#a53c79a20e8d21d2c3bc9e6d0dfc79cb4">setContrast</a> ( uint8_t value );</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; </div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; <span class="keywordtype">int</span> init();</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; </div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; uint8_t _Addr; <span class="comment">// I2C Address of the IO expander</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; </div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;};</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="class_liquid_crystal___i2_c___by_vac_html_a9e64cc68ec5df1a0fa421a242239b1b1"><div class="ttname"><a href="class_liquid_crystal___i2_c___by_vac.html#a9e64cc68ec5df1a0fa421a242239b1b1">LiquidCrystal_I2C_ByVac::send</a></div><div class="ttdeci">virtual void send(uint8_t value, uint8_t mode)</div><div class="ttdef"><b>Definition:</b> LiquidCrystal_I2C_ByVac.cpp:99</div></div>
<div class="ttc" id="class_liquid_crystal___i2_c___by_vac_html"><div class="ttname"><a href="class_liquid_crystal___i2_c___by_vac.html">LiquidCrystal_I2C_ByVac</a></div><div class="ttdef"><b>Definition:</b> LiquidCrystal_I2C_ByVac.h:37</div></div>
<div class="ttc" id="class_liquid_crystal___i2_c___by_vac_html"><div class="ttname"><a href="class_liquid_crystal___i2_c___by_vac.html">LiquidCrystal_I2C_ByVac</a></div><div class="ttdef"><b>Definition:</b> LiquidCrystal_I2C_ByVac.h:41</div></div>
<div class="ttc" id="class_l_c_d_html"><div class="ttname"><a href="class_l_c_d.html">LCD</a></div><div class="ttdef"><b>Definition:</b> LCD.h:187</div></div>
<div class="ttc" id="class_liquid_crystal___i2_c___by_vac_html_a34ce9cf919b9f8de59f842a4e94c1abb"><div class="ttname"><a href="class_liquid_crystal___i2_c___by_vac.html#a34ce9cf919b9f8de59f842a4e94c1abb">LiquidCrystal_I2C_ByVac::begin</a></div><div class="ttdeci">virtual void begin(uint8_t cols, uint8_t rows, uint8_t charsize=LCD_5x8DOTS)</div><div class="ttdef"><b>Definition:</b> LiquidCrystal_I2C_ByVac.cpp:49</div></div>
<div class="ttc" id="class_liquid_crystal___i2_c___by_vac_html_a9b16e6ce123e2ebe3a3e33b2306e66a7"><div class="ttname"><a href="class_liquid_crystal___i2_c___by_vac.html#a9b16e6ce123e2ebe3a3e33b2306e66a7">LiquidCrystal_I2C_ByVac::setBacklight</a></div><div class="ttdeci">void setBacklight(uint8_t value)</div><div class="ttdef"><b>Definition:</b> LiquidCrystal_I2C_ByVac.cpp:60</div></div>
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<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
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<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
utility/docs/html/_liquid_crystal___s_r2_w_8h_source.html
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<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
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<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
utility/docs/html/_liquid_crystal___s_r_8h_source.html
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<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
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<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
@@ -150,15 +150,15 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160;};</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160;</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="class_s_i2_c_i_o_html_ae1e3c6fd22872f248de6a90af27d92de"><div class="ttname"><a href="class_s_i2_c_i_o.html#ae1e3c6fd22872f248de6a90af27d92de">SI2CIO::digitalWrite</a></div><div class="ttdeci">int digitalWrite(uint8_t pin, uint8_t level)</div><div class="ttdef"><b>Definition:</b> SI2CIO.cpp:179</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_a47c3ac3198cddcf9e6da1ccacd9db5d9"><div class="ttname"><a href="class_s_i2_c_i_o.html#a47c3ac3198cddcf9e6da1ccacd9db5d9">SI2CIO::write</a></div><div class="ttdeci">int write(uint8_t value)</div><div class="ttdef"><b>Definition:</b> SI2CIO.cpp:141</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_ae1e3c6fd22872f248de6a90af27d92de"><div class="ttname"><a href="class_s_i2_c_i_o.html#ae1e3c6fd22872f248de6a90af27d92de">SI2CIO::digitalWrite</a></div><div class="ttdeci">int digitalWrite(uint8_t pin, uint8_t level)</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_a47c3ac3198cddcf9e6da1ccacd9db5d9"><div class="ttname"><a href="class_s_i2_c_i_o.html#a47c3ac3198cddcf9e6da1ccacd9db5d9">SI2CIO::write</a></div><div class="ttdeci">int write(uint8_t value)</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html"><div class="ttname"><a href="class_s_i2_c_i_o.html">SI2CIO</a></div><div class="ttdef"><b>Definition:</b> SI2CIO.h:42</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_a8e78ee0ee2d1bb12136b5c5a3487512b"><div class="ttname"><a href="class_s_i2_c_i_o.html#a8e78ee0ee2d1bb12136b5c5a3487512b">SI2CIO::portMode</a></div><div class="ttdeci">void portMode(uint8_t dir)</div><div class="ttdef"><b>Definition:</b> SI2CIO.cpp:106</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_ae27c1861e885c6ade3f3923658957edf"><div class="ttname"><a href="class_s_i2_c_i_o.html#ae27c1861e885c6ade3f3923658957edf">SI2CIO::SI2CIO</a></div><div class="ttdeci">SI2CIO()</div><div class="ttdef"><b>Definition:</b> SI2CIO.cpp:59</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_a32cb72361397c1051ee650dbb2190060"><div class="ttname"><a href="class_s_i2_c_i_o.html#a32cb72361397c1051ee650dbb2190060">SI2CIO::read</a></div><div class="ttdeci">uint8_t read(void)</div><div class="ttdef"><b>Definition:</b> SI2CIO.cpp:124</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_a4ef4fb77ddd3d248be5e0898e33430a3"><div class="ttname"><a href="class_s_i2_c_i_o.html#a4ef4fb77ddd3d248be5e0898e33430a3">SI2CIO::pinMode</a></div><div class="ttdeci">void pinMode(uint8_t pin, uint8_t dir)</div><div class="ttdef"><b>Definition:</b> SI2CIO.cpp:89</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_aef6df8409b67bda118c2e055af3d6f47"><div class="ttname"><a href="class_s_i2_c_i_o.html#aef6df8409b67bda118c2e055af3d6f47">SI2CIO::begin</a></div><div class="ttdeci">int begin(uint8_t i2cAddr)</div><div class="ttdef"><b>Definition:</b> SI2CIO.cpp:72</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_a15fe6d174fb001bca7866004e96f0b33"><div class="ttname"><a href="class_s_i2_c_i_o.html#a15fe6d174fb001bca7866004e96f0b33">SI2CIO::digitalRead</a></div><div class="ttdeci">uint8_t digitalRead(uint8_t pin)</div><div class="ttdef"><b>Definition:</b> SI2CIO.cpp:162</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_a8e78ee0ee2d1bb12136b5c5a3487512b"><div class="ttname"><a href="class_s_i2_c_i_o.html#a8e78ee0ee2d1bb12136b5c5a3487512b">SI2CIO::portMode</a></div><div class="ttdeci">void portMode(uint8_t dir)</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_ae27c1861e885c6ade3f3923658957edf"><div class="ttname"><a href="class_s_i2_c_i_o.html#ae27c1861e885c6ade3f3923658957edf">SI2CIO::SI2CIO</a></div><div class="ttdeci">SI2CIO()</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_a32cb72361397c1051ee650dbb2190060"><div class="ttname"><a href="class_s_i2_c_i_o.html#a32cb72361397c1051ee650dbb2190060">SI2CIO::read</a></div><div class="ttdeci">uint8_t read(void)</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_a4ef4fb77ddd3d248be5e0898e33430a3"><div class="ttname"><a href="class_s_i2_c_i_o.html#a4ef4fb77ddd3d248be5e0898e33430a3">SI2CIO::pinMode</a></div><div class="ttdeci">void pinMode(uint8_t pin, uint8_t dir)</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_aef6df8409b67bda118c2e055af3d6f47"><div class="ttname"><a href="class_s_i2_c_i_o.html#aef6df8409b67bda118c2e055af3d6f47">SI2CIO::begin</a></div><div class="ttdeci">int begin(uint8_t i2cAddr)</div></div>
<div class="ttc" id="class_s_i2_c_i_o_html_a15fe6d174fb001bca7866004e96f0b33"><div class="ttname"><a href="class_s_i2_c_i_o.html#a15fe6d174fb001bca7866004e96f0b33">SI2CIO::digitalRead</a></div><div class="ttdeci">uint8_t digitalRead(uint8_t pin)</div></div>
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utility/docs/html/_soft_i2_c_master_8h_source.html
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<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">New LiquidCrystal library
&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
</div>
<div id="projectbrief">Generic LCD control library</div>
</td>
@@ -146,455 +146,461 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;<span class="preprocessor">#ifndef _SOFTI2C_H</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;<span class="preprocessor">#define _SOFTI2C_H 1</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;<span class="comment">// Init function. Needs to be called once in the beginning.</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;<span class="comment">// Returns false if SDA or SCL are low, which probably means </span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;<span class="comment">// a I2C bus lockup or that the lines are not pulled up.</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;<span class="keywordtype">boolean</span> __attribute__ ((noinline)) i2c_init(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;<span class="comment">// Start transfer function: &lt;addr&gt; is the 8-bit I2C address (including the R/W</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;<span class="comment">// bit). </span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;<span class="comment">// Return: true if the slave replies with an &quot;acknowledge&quot;, false otherwise</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;<span class="keywordtype">bool</span> __attribute__ ((noinline)) i2c_start(uint8_t addr); </div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;<span class="comment">// Similar to start function, but wait for an ACK! Be careful, this can </span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;<span class="comment">// result in an infinite loop!</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;<span class="keywordtype">void</span> __attribute__ ((noinline)) i2c_start_wait(uint8_t addr);</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;<span class="comment">// Repeated start function: After having claimed the bus with a start condition,</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;<span class="comment">// you can address another or the same chip again without an intervening </span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;<span class="comment">// stop condition.</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160;<span class="comment">// Return: true if the slave replies with an &quot;acknowledge&quot;, false otherwise</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;<span class="keywordtype">bool</span> __attribute__ ((noinline)) i2c_rep_start(uint8_t addr);</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;<span class="comment">// Issue a stop condition, freeing the bus.</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;<span class="keywordtype">void</span> __attribute__ ((noinline)) i2c_stop(<span class="keywordtype">void</span>) asm(&quot;ass_i2c_stop&quot;);</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160;<span class="comment">// Write one byte to the slave chip that had been addressed</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;<span class="comment">// by the previous start call. &lt;value&gt; is the byte to be sent.</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;<span class="comment">// Return: true if the slave replies with an &quot;acknowledge&quot;, false otherwise</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160;<span class="keywordtype">bool</span> __attribute__ ((noinline)) i2c_write(uint8_t value) asm(&quot;ass_i2c_write&quot;);</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;<span class="comment">// Read one byte. If &lt;last&gt; is true, we send a NAK after having received </span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;<span class="comment">// the byte in order to terminate the read sequence. </span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160;uint8_t __attribute__ ((noinline)) i2c_read(<span class="keywordtype">bool</span> last);</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160;<span class="comment">// You can set I2C_CPUFREQ independently of F_CPU if you </span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;<span class="comment">// change the CPU frequency on the fly. If do not define it,</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;<span class="comment">// it will use the value of F_CPU</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160;<span class="preprocessor">#ifndef I2C_CPUFREQ</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160;<span class="preprocessor">#define I2C_CPUFREQ F_CPU</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160;<span class="comment">// If I2C_FASTMODE is set to 1, then the highest possible frequency below 400kHz</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160;<span class="comment">// is selected. Be aware that not all slave chips may be able to deal with that!</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;<span class="preprocessor">#ifndef I2C_FASTMODE</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160;<span class="preprocessor">#define I2C_FASTMODE 0</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;<span class="comment">// If I2C_FASTMODE is not defined or defined to be 0, then you can set</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;<span class="comment">// I2C_SLOWMODE to 1. In this case, the I2C frequency will not be higher </span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160;<span class="comment">// than 25KHz. This could be useful for problematic buses.</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;<span class="preprocessor">#ifndef I2C_SLOWMODE</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160;<span class="preprocessor">#define I2C_SLOWMODE 0</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;<span class="comment">// if I2C_NOINTERRUPT is 1, then the I2C routines are not interruptable.</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160;<span class="comment">// This is most probably only necessary if you are using a 1MHz system clock,</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160;<span class="comment">// you are communicating with a SMBus device, and you want to avoid timeouts.</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160;<span class="comment">// Be aware that the interrupt bit is enabled after each call. So the</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160;<span class="comment">// I2C functions should not be called in interrupt routines or critical regions.</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160;<span class="preprocessor">#ifndef I2C_NOINTERRUPT</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160;<span class="preprocessor">#define I2C_NOINTERRUPT 0</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160;</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160;<span class="comment">// I2C_TIMEOUT can be set to a value between 1 and 10000.</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160;<span class="comment">// If it is defined and nonzero, it leads to a timeout if the</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160;<span class="comment">// SCL is low longer than I2C_TIMEOUT milliseconds, i.e., max timeout is 10 sec</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;<span class="preprocessor">#ifndef I2C_TIMEOUT</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160;<span class="preprocessor">#define I2C_TIMEOUT 0</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160;<span class="preprocessor">#else </span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;<span class="preprocessor">#if I2C_TIMEOUT &gt; 10000</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160;<span class="preprocessor">#error I2C_TIMEOUT is too large</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160;</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160;<span class="preprocessor">#define I2C_TIMEOUT_DELAY_LOOPS (I2C_CPUFREQ/1000UL)*I2C_TIMEOUT/4000UL</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160;<span class="preprocessor">#if I2C_TIMEOUT_DELAY_LOOPS &lt; 1</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160;<span class="preprocessor">#define I2C_MAX_STRETCH 1</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160;<span class="preprocessor">#if I2C_TIMEOUT_DELAY_LOOPS &gt; 60000UL</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160;<span class="preprocessor">#define I2C_MAX_STRETCH 60000UL</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160;<span class="preprocessor">#define I2C_MAX_STRETCH I2C_TIMEOUT_DELAY_LOOPS</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160;</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160;<span class="preprocessor">#if I2C_FASTMODE</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160;<span class="preprocessor">#define I2C_DELAY_COUNTER (((I2C_CPUFREQ/400000L)/2-19)/3)</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160;<span class="preprocessor">#if I2C_SLOWMODE</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160;<span class="preprocessor">#define I2C_DELAY_COUNTER (((I2C_CPUFREQ/25000L)/2-19)/3)</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160;<span class="preprocessor">#define I2C_DELAY_COUNTER (((I2C_CPUFREQ/100000L)/2-19)/3)</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160;</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160;<span class="comment">// Table of I2C bus speed in kbit/sec:</span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160;<span class="comment">// CPU clock: 1MHz 2MHz 4MHz 8MHz 16MHz 20MHz</span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160;<span class="comment">// Fast I2C mode 40 80 150 300 400 400</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160;<span class="comment">// Standard I2C mode 40 80 100 100 100 100</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160;<span class="comment">// Slow I2C mode 25 25 25 25 25 25 </span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160;<span class="comment">// constants for reading &amp; writing</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160;<span class="preprocessor">#define I2C_READ 1</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160;<span class="preprocessor">#define I2C_WRITE 0</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160;<span class="comment">// map the IO register back into the IO address space</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160;<span class="preprocessor">#define SDA_DDR (_SFR_IO_ADDR(SDA_PORT) - 1)</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160;<span class="preprocessor">#define SCL_DDR (_SFR_IO_ADDR(SCL_PORT) - 1)</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160;<span class="preprocessor">#define SDA_OUT _SFR_IO_ADDR(SDA_PORT)</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160;<span class="preprocessor">#define SCL_OUT _SFR_IO_ADDR(SCL_PORT)</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160;<span class="preprocessor">#define SDA_IN (_SFR_IO_ADDR(SDA_PORT) - 2)</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160;<span class="preprocessor">#define SCL_IN (_SFR_IO_ADDR(SCL_PORT) - 2)</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160;</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160;<span class="preprocessor">#ifndef __tmp_reg__</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160;<span class="preprocessor">#define __tmp_reg__ 0</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; </div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160;<span class="comment">// Internal delay functions.</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160;<span class="keywordtype">void</span> __attribute__ ((noinline)) i2c_delay_half(<span class="keywordtype">void</span>) asm(&quot;ass_i2c_delay_half&quot;);</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160;<span class="keywordtype">void</span> __attribute__ ((noinline)) i2c_wait_scl_high(<span class="keywordtype">void</span>) asm(&quot;ass_i2c_wait_scl_high&quot;);</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160;</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160;<span class="keywordtype">void</span> i2c_delay_half(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160;{ <span class="comment">// function call 3 cycles =&gt; 3C</span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160;<span class="preprocessor">#if I2C_DELAY_COUNTER &lt; 1</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; __asm__ __volatile__ (<span class="stringliteral">&quot; ret&quot;</span>);</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; <span class="comment">// 7 cycles for call and return</span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; (</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; <span class="stringliteral">&quot; ldi r25, %[DELAY] ;load delay constant ;; 4C \n\t&quot;</span></div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; <span class="stringliteral">&quot;_Lidelay: \n\t&quot;</span></div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; <span class="stringliteral">&quot; dec r25 ;decrement counter ;; 4C+xC \n\t&quot;</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; <span class="stringliteral">&quot; brne _Lidelay ;;5C+(x-1)2C+xC\n\t&quot;</span></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; <span class="stringliteral">&quot; ret ;; 9C+(x-1)2C+xC = 7C+xC&quot;</span> </div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; : : [DELAY] <span class="stringliteral">&quot;M&quot;</span> I2C_DELAY_COUNTER : <span class="stringliteral">&quot;r25&quot;</span>);</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; <span class="comment">// 7 cycles + 3 times x cycles</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160;}</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160;</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160;<span class="keywordtype">void</span> i2c_wait_scl_high(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160;{</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160;<span class="preprocessor">#if I2C_TIMEOUT &lt;= 0</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; (<span class="stringliteral">&quot;_Li2c_wait_stretch: \n\t&quot;</span></div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;wait for SCL high \n\t&quot;</span> </div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_wait_stretch \n\t&quot;</span></div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; <span class="stringliteral">&quot; cln ;signal: no timeout \n\t&quot;</span></div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <span class="stringliteral">&quot; ret &quot;</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; : : [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN));</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; ( <span class="stringliteral">&quot; ldi r27, %[HISTRETCH] ;load delay counter \n\t&quot;</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; <span class="stringliteral">&quot; ldi r26, %[LOSTRETCH] \n\t&quot;</span></div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; <span class="stringliteral">&quot;_Lwait_stretch: \n\t&quot;</span></div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; <span class="stringliteral">&quot; clr __tmp_reg__ ;do next loop 255 times \n\t&quot;</span></div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; <span class="stringliteral">&quot;_Lwait_stretch_inner_loop: \n\t&quot;</span></div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; <span class="stringliteral">&quot; rcall _Lcheck_scl_level ;call check function ;; 12C \n\t&quot;</span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; <span class="stringliteral">&quot; brpl _Lstretch_done ;done if N=0 ;; +1 = 13C\n\t&quot;</span></div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; <span class="stringliteral">&quot; dec __tmp_reg__ ;dec inner loop counter;; +1 = 14C\n\t&quot;</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; <span class="stringliteral">&quot; brne _Lwait_stretch_inner_loop ;; +2 = 16C\n\t&quot;</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; <span class="stringliteral">&quot; sbiw r26,1 ;dec outer loop counter \n\t&quot;</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; <span class="stringliteral">&quot; brne _Lwait_stretch ;continue with outer loop \n\t&quot;</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; <span class="stringliteral">&quot; sen ;timeout -&gt; set N-bit=1 \n\t&quot;</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; <span class="stringliteral">&quot; rjmp _Lwait_return ;and return with N=1\n\t&quot;</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; <span class="stringliteral">&quot;_Lstretch_done: ;SCL=1 sensed \n\t&quot;</span> </div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; <span class="stringliteral">&quot; cln ;OK -&gt; clear N-bit \n\t&quot;</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; <span class="stringliteral">&quot; rjmp _Lwait_return ; and return with N=0 \n\t&quot;</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160;</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; <span class="stringliteral">&quot;_Lcheck_scl_level: ;; call = 3C\n\t&quot;</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; <span class="stringliteral">&quot; cln ;; +1C = 4C \n\t&quot;</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160; <span class="stringliteral">&quot; sbic %[SCLIN],%[SCLPIN] ;skip if SCL still low ;; +2C = 6C \n\t&quot;</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; <span class="stringliteral">&quot; rjmp _Lscl_high ;; +0C = 6C \n\t&quot;</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160; <span class="stringliteral">&quot; sen ;; +1 = 7C\n\t &quot;</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160; <span class="stringliteral">&quot;_Lscl_high: &quot;</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; <span class="stringliteral">&quot; nop ;; +1C = 8C \n\t&quot;</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160; <span class="stringliteral">&quot; ret ;return N-Bit=1 if low ;; +4 = 12C\n\t&quot;</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160;</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; <span class="stringliteral">&quot;_Lwait_return:&quot;</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160; : : [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN), </div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; [HISTRETCH] <span class="stringliteral">&quot;M&quot;</span> (I2C_MAX_STRETCH&gt;&gt;8), </div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160; [LOSTRETCH] <span class="stringliteral">&quot;M&quot;</span> (I2C_MAX_STRETCH&amp;0xFF)</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; : <span class="stringliteral">&quot;r26&quot;</span>, <span class="stringliteral">&quot;r27&quot;</span>);</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160;}</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160;</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160;</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160;<span class="keywordtype">boolean</span> i2c_init(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160;{</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; (<span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA \n\t&quot;</span> </div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL \n\t&quot;</span> </div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; <span class="stringliteral">&quot; cbi %[SDAOUT],%[SDAPIN] ;clear SDA output value \n\t&quot;</span> </div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160; <span class="stringliteral">&quot; cbi %[SCLOUT],%[SCLPIN] ;clear SCL output value \n\t&quot;</span> </div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; <span class="stringliteral">&quot; clr r24 ;set return value to false \n\t&quot;</span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; <span class="stringliteral">&quot; clr r25 ;set return value to false \n\t&quot;</span></div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; <span class="stringliteral">&quot; sbis %[SDAIN],%[SDAPIN] ;check for SDA high\n\t&quot;</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; <span class="stringliteral">&quot; ret ;if low return with false \n\t&quot;</span> </div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;check for SCL high \n\t&quot;</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160; <span class="stringliteral">&quot; ret ;if low return with false \n\t&quot;</span> </div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160; <span class="stringliteral">&quot; ldi r24,1 ;set return value to true \n\t&quot;</span></div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160; <span class="stringliteral">&quot; ret &quot;</span></div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160; : :</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160; [SCLDDR] <span class="stringliteral">&quot;I&quot;</span> (SCL_DDR), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN), </div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN), [SCLOUT] <span class="stringliteral">&quot;I&quot;</span> (SCL_OUT),</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160; [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN), </div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160; [SDAIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_IN), [SDAOUT] <span class="stringliteral">&quot;I&quot;</span> (SDA_OUT)); </div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160;}</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160;</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160;<span class="keywordtype">bool</span> i2c_start(uint8_t addr)</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160;{</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; (</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160;#<span class="keywordflow">if</span> I2C_NOINTERRUPT</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160; <span class="stringliteral">&quot; cli ;clear IRQ bit \n\t&quot;</span></div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160;#endif</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;check for clock stretching slave\n\t&quot;</span></div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high ;wait until SCL=H\n\t&quot;</span> </div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160; <span class="stringliteral">&quot; sbi %[SDADDR],%[SDAPIN] ;force SDA low \n\t&quot;</span> </div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;wait T/2 \n\t&quot;</span></div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_write ;now write address \n\t&quot;</span></div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>&#160; <span class="stringliteral">&quot; ret&quot;</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>&#160; : : [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN),</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>&#160; [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN),[SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN)); </div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>; <span class="comment">// we never return here!</span></div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>&#160;}</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>&#160;</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>&#160;<span class="keywordtype">bool</span> i2c_rep_start(uint8_t addr)</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>&#160;{</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>&#160;</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>&#160; (</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>&#160;#<span class="keywordflow">if</span> I2C_NOINTERRUPT</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>&#160; <span class="stringliteral">&quot; cli \n\t&quot;</span></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>&#160;#endif</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low \n\t&quot;</span> </div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 \n\t&quot;</span> </div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160; <span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA \n\t&quot;</span> </div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 \n\t&quot;</span> </div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL \n\t&quot;</span> </div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 \n\t&quot;</span> </div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;check for clock stretching slave\n\t&quot;</span></div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high ;wait until SCL=H\n\t&quot;</span> </div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; <span class="stringliteral">&quot; sbi %[SDADDR],%[SDAPIN] ;force SDA low \n\t&quot;</span> </div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 \n\t&quot;</span> </div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_write \n\t&quot;</span></div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; <span class="stringliteral">&quot; ret&quot;</span></div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160; : : [SCLDDR] <span class="stringliteral">&quot;I&quot;</span> (SCL_DDR), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN),[SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN),</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160; [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN)); </div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>; <span class="comment">// just to fool the compiler</span></div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>&#160;}</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160;</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160;<span class="keywordtype">void</span> i2c_start_wait(uint8_t addr)</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>&#160;{</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>&#160; (</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160; <span class="stringliteral">&quot; push r24 ;save original parameter \n\t&quot;</span></div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160; <span class="stringliteral">&quot;_Li2c_start_wait1: \n\t&quot;</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160; <span class="stringliteral">&quot; pop r24 ;restore original parameter\n\t&quot;</span></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160; <span class="stringliteral">&quot; push r24 ;and save again \n\t&quot;</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>&#160;#<span class="keywordflow">if</span> I2C_NOINTERRUPT</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>&#160; <span class="stringliteral">&quot; cli ;disable interrupts \n\t&quot;</span></div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>&#160;#endif</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;check for clock stretching slave\n\t&quot;</span></div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high ;wait until SCL=H\n\t&quot;</span> </div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>&#160; <span class="stringliteral">&quot; sbi %[SDADDR],%[SDAPIN] ;force SDA low \n\t&quot;</span> </div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 \n\t&quot;</span> </div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_write ;write address \n\t&quot;</span> </div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>&#160; <span class="stringliteral">&quot; tst r24 ;if device not busy -&gt; done \n\t&quot;</span> </div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>&#160; <span class="stringliteral">&quot; brne _Li2c_start_wait_done \n\t&quot;</span> </div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_stop ;terminate write &amp; enable IRQ \n\t&quot;</span> </div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_start_wait1 ;device busy, poll ack again \n\t&quot;</span> </div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>&#160; <span class="stringliteral">&quot;_Li2c_start_wait_done: \n\t&quot;</span></div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>&#160; <span class="stringliteral">&quot; pop __tmp_reg__ ;pop off orig argument \n\t&quot;</span></div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>&#160; <span class="stringliteral">&quot; ret &quot;</span></div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>&#160; : : [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN),</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>&#160; [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN),[SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN)); </div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>&#160;}</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>&#160;</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>&#160;<span class="keywordtype">void</span> i2c_stop(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>&#160;{</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>&#160; (</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low \n\t&quot;</span> </div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>&#160; <span class="stringliteral">&quot; sbi %[SDADDR],%[SDAPIN] ;force SDA low \n\t&quot;</span> </div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;T/2 delay \n\t&quot;</span></div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL \n\t&quot;</span> </div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;<span class="preprocessor">#if defined (__AVR__)</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;<span class="comment">// Init function. Needs to be called once in the beginning.</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;<span class="comment">// Returns false if SDA or SCL are low, which probably means </span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;<span class="comment">// a I2C bus lockup or that the lines are not pulled up.</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;<span class="keywordtype">boolean</span> __attribute__ ((noinline)) i2c_init(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;<span class="comment">// Start transfer function: &lt;addr&gt; is the 8-bit I2C address (including the R/W</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;<span class="comment">// bit). </span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;<span class="comment">// Return: true if the slave replies with an &quot;acknowledge&quot;, false otherwise</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;<span class="keywordtype">bool</span> __attribute__ ((noinline)) i2c_start(uint8_t addr); </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;<span class="comment">// Similar to start function, but wait for an ACK! Be careful, this can </span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;<span class="comment">// result in an infinite loop!</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;<span class="keywordtype">void</span> __attribute__ ((noinline)) i2c_start_wait(uint8_t addr);</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;<span class="comment">// Repeated start function: After having claimed the bus with a start condition,</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160;<span class="comment">// you can address another or the same chip again without an intervening </span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;<span class="comment">// stop condition.</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160;<span class="comment">// Return: true if the slave replies with an &quot;acknowledge&quot;, false otherwise</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;<span class="keywordtype">bool</span> __attribute__ ((noinline)) i2c_rep_start(uint8_t addr);</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;<span class="comment">// Issue a stop condition, freeing the bus.</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160;<span class="keywordtype">void</span> __attribute__ ((noinline)) i2c_stop(<span class="keywordtype">void</span>) asm(&quot;ass_i2c_stop&quot;);</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;<span class="comment">// Write one byte to the slave chip that had been addressed</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160;<span class="comment">// by the previous start call. &lt;value&gt; is the byte to be sent.</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;<span class="comment">// Return: true if the slave replies with an &quot;acknowledge&quot;, false otherwise</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;<span class="keywordtype">bool</span> __attribute__ ((noinline)) i2c_write(uint8_t value) asm(&quot;ass_i2c_write&quot;);</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160;<span class="comment">// Read one byte. If &lt;last&gt; is true, we send a NAK after having received </span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;<span class="comment">// the byte in order to terminate the read sequence. </span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160;uint8_t __attribute__ ((noinline)) i2c_read(<span class="keywordtype">bool</span> last);</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;<span class="comment">// You can set I2C_CPUFREQ independently of F_CPU if you </span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160;<span class="comment">// change the CPU frequency on the fly. If do not define it,</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160;<span class="comment">// it will use the value of F_CPU</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160;<span class="preprocessor">#ifndef I2C_CPUFREQ</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160;<span class="preprocessor">#define I2C_CPUFREQ F_CPU</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;<span class="comment">// If I2C_FASTMODE is set to 1, then the highest possible frequency below 400kHz</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160;<span class="comment">// is selected. Be aware that not all slave chips may be able to deal with that!</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;<span class="preprocessor">#ifndef I2C_FASTMODE</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;<span class="preprocessor">#define I2C_FASTMODE 0</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160;<span class="comment">// If I2C_FASTMODE is not defined or defined to be 0, then you can set</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;<span class="comment">// I2C_SLOWMODE to 1. In this case, the I2C frequency will not be higher </span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160;<span class="comment">// than 25KHz. This could be useful for problematic buses.</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;<span class="preprocessor">#ifndef I2C_SLOWMODE</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160;<span class="preprocessor">#define I2C_SLOWMODE 0</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160;<span class="comment">// if I2C_NOINTERRUPT is 1, then the I2C routines are not interruptable.</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160;<span class="comment">// This is most probably only necessary if you are using a 1MHz system clock,</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160;<span class="comment">// you are communicating with a SMBus device, and you want to avoid timeouts.</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160;<span class="comment">// Be aware that the interrupt bit is enabled after each call. So the</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160;<span class="comment">// I2C functions should not be called in interrupt routines or critical regions.</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160;<span class="preprocessor">#ifndef I2C_NOINTERRUPT</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160;<span class="preprocessor">#define I2C_NOINTERRUPT 0</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160;<span class="comment">// I2C_TIMEOUT can be set to a value between 1 and 10000.</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;<span class="comment">// If it is defined and nonzero, it leads to a timeout if the</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160;<span class="comment">// SCL is low longer than I2C_TIMEOUT milliseconds, i.e., max timeout is 10 sec</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160;<span class="preprocessor">#ifndef I2C_TIMEOUT</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;<span class="preprocessor">#define I2C_TIMEOUT 0</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160;<span class="preprocessor">#else </span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160;<span class="preprocessor">#if I2C_TIMEOUT &gt; 10000</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160;<span class="preprocessor">#error I2C_TIMEOUT is too large</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160;<span class="preprocessor">#define I2C_TIMEOUT_DELAY_LOOPS (I2C_CPUFREQ/1000UL)*I2C_TIMEOUT/4000UL</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160;<span class="preprocessor">#if I2C_TIMEOUT_DELAY_LOOPS &lt; 1</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160;<span class="preprocessor">#define I2C_MAX_STRETCH 1</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160;<span class="preprocessor">#if I2C_TIMEOUT_DELAY_LOOPS &gt; 60000UL</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160;<span class="preprocessor">#define I2C_MAX_STRETCH 60000UL</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160;<span class="preprocessor">#define I2C_MAX_STRETCH I2C_TIMEOUT_DELAY_LOOPS</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160;</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160;<span class="preprocessor">#if I2C_FASTMODE</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160;<span class="preprocessor">#define I2C_DELAY_COUNTER (((I2C_CPUFREQ/400000L)/2-19)/3)</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160;<span class="preprocessor">#if I2C_SLOWMODE</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160;<span class="preprocessor">#define I2C_DELAY_COUNTER (((I2C_CPUFREQ/25000L)/2-19)/3)</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160;<span class="preprocessor">#define I2C_DELAY_COUNTER (((I2C_CPUFREQ/100000L)/2-19)/3)</span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160;</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160;<span class="comment">// Table of I2C bus speed in kbit/sec:</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160;<span class="comment">// CPU clock: 1MHz 2MHz 4MHz 8MHz 16MHz 20MHz</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160;<span class="comment">// Fast I2C mode 40 80 150 300 400 400</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160;<span class="comment">// Standard I2C mode 40 80 100 100 100 100</span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160;<span class="comment">// Slow I2C mode 25 25 25 25 25 25 </span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160;</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160;<span class="comment">// constants for reading &amp; writing</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160;<span class="preprocessor">#define I2C_READ 1</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160;<span class="preprocessor">#define I2C_WRITE 0</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160;</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160;<span class="comment">// map the IO register back into the IO address space</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160;<span class="preprocessor">#define SDA_DDR (_SFR_IO_ADDR(SDA_PORT) - 1)</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160;<span class="preprocessor">#define SCL_DDR (_SFR_IO_ADDR(SCL_PORT) - 1)</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160;<span class="preprocessor">#define SDA_OUT _SFR_IO_ADDR(SDA_PORT)</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160;<span class="preprocessor">#define SCL_OUT _SFR_IO_ADDR(SCL_PORT)</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160;<span class="preprocessor">#define SDA_IN (_SFR_IO_ADDR(SDA_PORT) - 2)</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160;<span class="preprocessor">#define SCL_IN (_SFR_IO_ADDR(SCL_PORT) - 2)</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160;</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160;<span class="preprocessor">#ifndef __tmp_reg__</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160;<span class="preprocessor">#define __tmp_reg__ 0</span></div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160;</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160; </div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160;<span class="comment">// Internal delay functions.</span></div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160;<span class="keywordtype">void</span> __attribute__ ((noinline)) i2c_delay_half(<span class="keywordtype">void</span>) asm(&quot;ass_i2c_delay_half&quot;);</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160;<span class="keywordtype">void</span> __attribute__ ((noinline)) i2c_wait_scl_high(<span class="keywordtype">void</span>) asm(&quot;ass_i2c_wait_scl_high&quot;);</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160;</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160;<span class="keywordtype">void</span> i2c_delay_half(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160;{ <span class="comment">// function call 3 cycles =&gt; 3C</span></div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160;<span class="preprocessor">#if I2C_DELAY_COUNTER &lt; 1</span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; __asm__ __volatile__ (<span class="stringliteral">&quot; ret&quot;</span>);</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; <span class="comment">// 7 cycles for call and return</span></div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; (</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; <span class="stringliteral">&quot; ldi r25, %[DELAY] ;load delay constant ;; 4C \n\t&quot;</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; <span class="stringliteral">&quot;_Lidelay: \n\t&quot;</span></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; <span class="stringliteral">&quot; dec r25 ;decrement counter ;; 4C+xC \n\t&quot;</span></div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; <span class="stringliteral">&quot; brne _Lidelay ;;5C+(x-1)2C+xC\n\t&quot;</span></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; <span class="stringliteral">&quot; ret ;; 9C+(x-1)2C+xC = 7C+xC&quot;</span> </div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; : : [DELAY] <span class="stringliteral">&quot;M&quot;</span> I2C_DELAY_COUNTER : <span class="stringliteral">&quot;r25&quot;</span>);</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; <span class="comment">// 7 cycles + 3 times x cycles</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160;}</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160;</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160;<span class="keywordtype">void</span> i2c_wait_scl_high(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160;{</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160;<span class="preprocessor">#if I2C_TIMEOUT &lt;= 0</span></div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; (<span class="stringliteral">&quot;_Li2c_wait_stretch: \n\t&quot;</span></div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;wait for SCL high \n\t&quot;</span> </div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_wait_stretch \n\t&quot;</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; <span class="stringliteral">&quot; cln ;signal: no timeout \n\t&quot;</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; <span class="stringliteral">&quot; ret &quot;</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; : : [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN));</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; ( <span class="stringliteral">&quot; ldi r27, %[HISTRETCH] ;load delay counter \n\t&quot;</span></div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; <span class="stringliteral">&quot; ldi r26, %[LOSTRETCH] \n\t&quot;</span></div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; <span class="stringliteral">&quot;_Lwait_stretch: \n\t&quot;</span></div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; <span class="stringliteral">&quot; clr __tmp_reg__ ;do next loop 255 times \n\t&quot;</span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; <span class="stringliteral">&quot;_Lwait_stretch_inner_loop: \n\t&quot;</span></div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; <span class="stringliteral">&quot; rcall _Lcheck_scl_level ;call check function ;; 12C \n\t&quot;</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; <span class="stringliteral">&quot; brpl _Lstretch_done ;done if N=0 ;; +1 = 13C\n\t&quot;</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; <span class="stringliteral">&quot; dec __tmp_reg__ ;dec inner loop counter;; +1 = 14C\n\t&quot;</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; <span class="stringliteral">&quot; brne _Lwait_stretch_inner_loop ;; +2 = 16C\n\t&quot;</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; <span class="stringliteral">&quot; sbiw r26,1 ;dec outer loop counter \n\t&quot;</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; <span class="stringliteral">&quot; brne _Lwait_stretch ;continue with outer loop \n\t&quot;</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; <span class="stringliteral">&quot; sen ;timeout -&gt; set N-bit=1 \n\t&quot;</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; <span class="stringliteral">&quot; rjmp _Lwait_return ;and return with N=1\n\t&quot;</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; <span class="stringliteral">&quot;_Lstretch_done: ;SCL=1 sensed \n\t&quot;</span> </div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; <span class="stringliteral">&quot; cln ;OK -&gt; clear N-bit \n\t&quot;</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; <span class="stringliteral">&quot; rjmp _Lwait_return ; and return with N=0 \n\t&quot;</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160;</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160; <span class="stringliteral">&quot;_Lcheck_scl_level: ;; call = 3C\n\t&quot;</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; <span class="stringliteral">&quot; cln ;; +1C = 4C \n\t&quot;</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160; <span class="stringliteral">&quot; sbic %[SCLIN],%[SCLPIN] ;skip if SCL still low ;; +2C = 6C \n\t&quot;</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160; <span class="stringliteral">&quot; rjmp _Lscl_high ;; +0C = 6C \n\t&quot;</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; <span class="stringliteral">&quot; sen ;; +1 = 7C\n\t &quot;</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160; <span class="stringliteral">&quot;_Lscl_high: &quot;</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160; <span class="stringliteral">&quot; nop ;; +1C = 8C \n\t&quot;</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; <span class="stringliteral">&quot; ret ;return N-Bit=1 if low ;; +4 = 12C\n\t&quot;</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160;</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; <span class="stringliteral">&quot;_Lwait_return:&quot;</span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160; : : [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN), </div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; [HISTRETCH] <span class="stringliteral">&quot;M&quot;</span> (I2C_MAX_STRETCH&gt;&gt;8), </div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160; [LOSTRETCH] <span class="stringliteral">&quot;M&quot;</span> (I2C_MAX_STRETCH&amp;0xFF)</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; : <span class="stringliteral">&quot;r26&quot;</span>, <span class="stringliteral">&quot;r27&quot;</span>);</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160;}</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160;</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160;</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160;<span class="keywordtype">boolean</span> i2c_init(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160;{</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; (<span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA \n\t&quot;</span> </div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL \n\t&quot;</span> </div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; <span class="stringliteral">&quot; cbi %[SDAOUT],%[SDAPIN] ;clear SDA output value \n\t&quot;</span> </div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; <span class="stringliteral">&quot; cbi %[SCLOUT],%[SCLPIN] ;clear SCL output value \n\t&quot;</span> </div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; <span class="stringliteral">&quot; clr r24 ;set return value to false \n\t&quot;</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; <span class="stringliteral">&quot; clr r25 ;set return value to false \n\t&quot;</span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; <span class="stringliteral">&quot; sbis %[SDAIN],%[SDAPIN] ;check for SDA high\n\t&quot;</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160; <span class="stringliteral">&quot; ret ;if low return with false \n\t&quot;</span> </div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;check for SCL high \n\t&quot;</span></div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160; <span class="stringliteral">&quot; ret ;if low return with false \n\t&quot;</span> </div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160; <span class="stringliteral">&quot; ldi r24,1 ;set return value to true \n\t&quot;</span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160; <span class="stringliteral">&quot; ret &quot;</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; : :</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160; [SCLDDR] <span class="stringliteral">&quot;I&quot;</span> (SCL_DDR), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN), </div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160; [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN), [SCLOUT] <span class="stringliteral">&quot;I&quot;</span> (SCL_OUT),</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160; [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN), </div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160; [SDAIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_IN), [SDAOUT] <span class="stringliteral">&quot;I&quot;</span> (SDA_OUT)); </div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160;}</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160;</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160;<span class="keywordtype">bool</span> i2c_start(uint8_t addr)</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160;{</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160; (</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160;#<span class="keywordflow">if</span> I2C_NOINTERRUPT</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160; <span class="stringliteral">&quot; cli ;clear IRQ bit \n\t&quot;</span></div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>&#160;#endif</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;check for clock stretching slave\n\t&quot;</span></div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high ;wait until SCL=H\n\t&quot;</span> </div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160; <span class="stringliteral">&quot; sbi %[SDADDR],%[SDAPIN] ;force SDA low \n\t&quot;</span> </div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;wait T/2 \n\t&quot;</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_write ;now write address \n\t&quot;</span></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>&#160; <span class="stringliteral">&quot; ret&quot;</span></div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>&#160; : : [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN),</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>&#160; [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN),[SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN)); </div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>; <span class="comment">// we never return here!</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>&#160;}</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>&#160;</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>&#160;<span class="keywordtype">bool</span> i2c_rep_start(uint8_t addr)</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>&#160;{</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>&#160;</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>&#160; (</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>&#160;#<span class="keywordflow">if</span> I2C_NOINTERRUPT</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>&#160; <span class="stringliteral">&quot; cli \n\t&quot;</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>&#160;#endif</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low \n\t&quot;</span> </div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 \n\t&quot;</span> </div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160; <span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA \n\t&quot;</span> </div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 \n\t&quot;</span> </div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL \n\t&quot;</span> </div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 \n\t&quot;</span> </div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;check for clock stretching slave\n\t&quot;</span></div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high ;wait until SCL=H\n\t&quot;</span> </div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160; <span class="stringliteral">&quot; sbi %[SDADDR],%[SDAPIN] ;force SDA low \n\t&quot;</span> </div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 \n\t&quot;</span> </div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_write \n\t&quot;</span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160; <span class="stringliteral">&quot; ret&quot;</span></div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>&#160; : : [SCLDDR] <span class="stringliteral">&quot;I&quot;</span> (SCL_DDR), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN),[SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN),</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>&#160; [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN)); </div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>; <span class="comment">// just to fool the compiler</span></div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160;}</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>&#160;</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>&#160;<span class="keywordtype">void</span> i2c_start_wait(uint8_t addr)</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>&#160;{</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160; (</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160; <span class="stringliteral">&quot; push r24 ;save original parameter \n\t&quot;</span></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160; <span class="stringliteral">&quot;_Li2c_start_wait1: \n\t&quot;</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>&#160; <span class="stringliteral">&quot; pop r24 ;restore original parameter\n\t&quot;</span></div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>&#160; <span class="stringliteral">&quot; push r24 ;and save again \n\t&quot;</span></div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>&#160;#<span class="keywordflow">if</span> I2C_NOINTERRUPT</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>&#160; <span class="stringliteral">&quot; cli ;disable interrupts \n\t&quot;</span></div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>&#160;#endif</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;check for clock stretching slave\n\t&quot;</span></div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high ;wait until SCL=H\n\t&quot;</span> </div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>&#160; <span class="stringliteral">&quot; sbi %[SDADDR],%[SDAPIN] ;force SDA low \n\t&quot;</span> </div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 \n\t&quot;</span> </div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_write ;write address \n\t&quot;</span> </div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>&#160; <span class="stringliteral">&quot; tst r24 ;if device not busy -&gt; done \n\t&quot;</span> </div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>&#160; <span class="stringliteral">&quot; brne _Li2c_start_wait_done \n\t&quot;</span> </div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_stop ;terminate write &amp; enable IRQ \n\t&quot;</span> </div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_start_wait1 ;device busy, poll ack again \n\t&quot;</span> </div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>&#160; <span class="stringliteral">&quot;_Li2c_start_wait_done: \n\t&quot;</span></div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>&#160; <span class="stringliteral">&quot; pop __tmp_reg__ ;pop off orig argument \n\t&quot;</span></div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>&#160; <span class="stringliteral">&quot; ret &quot;</span></div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>&#160; : : [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN),</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>&#160; [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN),[SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN)); </div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>&#160;}</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>&#160;</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>&#160;<span class="keywordtype">void</span> i2c_stop(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>&#160;{</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>&#160; (</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low \n\t&quot;</span> </div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>&#160; <span class="stringliteral">&quot; sbi %[SDADDR],%[SDAPIN] ;force SDA low \n\t&quot;</span> </div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;T/2 delay \n\t&quot;</span></div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;check for clock stretching slave\n\t&quot;</span></div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high ;wait until SCL=H\n\t&quot;</span> </div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>&#160; <span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA \n\t&quot;</span> </div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half \n\t&quot;</span></div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>&#160;#<span class="keywordflow">if</span> I2C_NOINTERRUPT</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>&#160; <span class="stringliteral">&quot; sei ;enable interrupts again!\n\t&quot;</span></div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>&#160;#endif</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>&#160; : : [SCLDDR] <span class="stringliteral">&quot;I&quot;</span> (SCL_DDR), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN), [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN),</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>&#160; [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN)); </div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>&#160;}</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>&#160;</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>&#160;<span class="keywordtype">bool</span> i2c_write(uint8_t value)</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>&#160;{</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>&#160; (</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>&#160; <span class="stringliteral">&quot; sec ;set carry flag \n\t&quot;</span></div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>&#160; <span class="stringliteral">&quot; rol r24 ;shift in carry and shift out MSB \n\t&quot;</span></div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_write_first \n\t&quot;</span></div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>&#160; <span class="stringliteral">&quot;_Li2c_write_bit:\n\t&quot;</span></div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>&#160; <span class="stringliteral">&quot; lsl r24 ;left shift into carry ;; 1C\n\t&quot;</span></div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>&#160; <span class="stringliteral">&quot;_Li2c_write_first:\n\t&quot;</span></div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>&#160; <span class="stringliteral">&quot; breq _Li2c_get_ack ;jump if TXreg is empty;; +1 = 2C \n\t&quot;</span></div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low ;; +2 = 4C \n\t&quot;</span></div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL \n\t&quot;</span> </div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;T/2 delay \n\t&quot;</span></div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;check for clock stretching slave\n\t&quot;</span></div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high ;wait until SCL=H\n\t&quot;</span> </div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>&#160; <span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA \n\t&quot;</span> </div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half \n\t&quot;</span></div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>&#160;#<span class="keywordflow">if</span> I2C_NOINTERRUPT</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>&#160; <span class="stringliteral">&quot; sei ;enable interrupts again!\n\t&quot;</span></div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>&#160;#endif</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>&#160; : : [SCLDDR] <span class="stringliteral">&quot;I&quot;</span> (SCL_DDR), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN), [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN),</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>&#160; [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN)); </div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>&#160;}</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>&#160;</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>&#160;<span class="keywordtype">bool</span> i2c_write(uint8_t value)</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>&#160;{</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>&#160; (</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>&#160; <span class="stringliteral">&quot; sec ;set carry flag \n\t&quot;</span></div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>&#160; <span class="stringliteral">&quot; rol r24 ;shift in carry and shift out MSB \n\t&quot;</span></div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_write_first \n\t&quot;</span></div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>&#160; <span class="stringliteral">&quot;_Li2c_write_bit:\n\t&quot;</span></div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>&#160; <span class="stringliteral">&quot; lsl r24 ;left shift into carry ;; 1C\n\t&quot;</span></div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>&#160; <span class="stringliteral">&quot;_Li2c_write_first:\n\t&quot;</span></div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>&#160; <span class="stringliteral">&quot; breq _Li2c_get_ack ;jump if TXreg is empty;; +1 = 2C \n\t&quot;</span></div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low ;; +2 = 4C \n\t&quot;</span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>&#160; <span class="stringliteral">&quot; brcc _Li2c_write_low ;;+1/+2=5/6C\n\t&quot;</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>&#160; <span class="stringliteral">&quot; nop ;; +1 = 7C \n\t&quot;</span></div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>&#160; <span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA ;; +2 = 9C \n\t&quot;</span></div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_write_high ;; +2 = 11C \n\t&quot;</span></div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>&#160; <span class="stringliteral">&quot;_Li2c_write_low: \n\t&quot;</span></div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>&#160; <span class="stringliteral">&quot; sbi %[SDADDR],%[SDAPIN] ;force SDA low ;; +2 = 9C \n\t&quot;</span></div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_write_high ;;+2 = 11C \n\t&quot;</span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>&#160; <span class="stringliteral">&quot;_Li2c_write_high: \n\t&quot;</span></div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;;+X = 11C+X\n\t&quot;</span></div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>&#160;#endif</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL ;;+2 = 13C+X\n\t&quot;</span></div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>&#160; <span class="stringliteral">&quot; cln ;clear N-bit ;;+1 = 14C+X\n\t&quot;</span></div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>&#160; <span class="stringliteral">&quot; brcc _Li2c_write_low ;;+1/+2=5/6C\n\t&quot;</span></div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>&#160; <span class="stringliteral">&quot; nop ;; +1 = 7C \n\t&quot;</span></div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>&#160; <span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA ;; +2 = 9C \n\t&quot;</span></div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_write_high ;; +2 = 11C \n\t&quot;</span></div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>&#160; <span class="stringliteral">&quot;_Li2c_write_low: \n\t&quot;</span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>&#160; <span class="stringliteral">&quot; sbi %[SDADDR],%[SDAPIN] ;force SDA low ;; +2 = 9C \n\t&quot;</span></div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_write_high ;;+2 = 11C \n\t&quot;</span></div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>&#160; <span class="stringliteral">&quot;_Li2c_write_high: \n\t&quot;</span></div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;;+X = 11C+X\n\t&quot;</span></div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>&#160;#endif</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL ;;+2 = 13C+X\n\t&quot;</span></div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>&#160; <span class="stringliteral">&quot; cln ;clear N-bit ;;+1 = 14C+X\n\t&quot;</span></div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;check for SCL high ;;+2 = 16C+X\n\t&quot;</span></div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high \n\t&quot;</span></div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>&#160; <span class="stringliteral">&quot; brpl _Ldelay_scl_high ;;+2 = 18C+X\n\t&quot;</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>&#160; <span class="stringliteral">&quot;_Li2c_write_return_false: \n\t&quot;</span></div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>&#160; <span class="stringliteral">&quot; clr r24 ; return false because of timeout \n\t&quot;</span></div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_write_return \n\t&quot;</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>&#160; <span class="stringliteral">&quot;_Ldelay_scl_high: \n\t&quot;</span></div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;;+X= 18C+2X\n\t&quot;</span></div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>&#160;#endif</div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_write_bit \n\t&quot;</span></div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>&#160; <span class="stringliteral">&quot; ;; +2 = 20C +2X for one bit-loop \n\t&quot;</span></div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>&#160; <span class="stringliteral">&quot;_Li2c_get_ack: \n\t&quot;</span></div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low ;; +2 = 5C \n\t&quot;</span></div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>&#160; <span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA ;;+2 = 7C \n\t&quot;</span></div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;; +X = 7C+X \n\t&quot;</span></div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>&#160;#endif</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>&#160; <span class="stringliteral">&quot; clr r25 ;; 17C+2X \n\t&quot;</span></div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>&#160; <span class="stringliteral">&quot; clr r24 ;return 0 ;; 14C + X \n\t&quot;</span></div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL ;; +2 = 9C+X\n\t&quot;</span></div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>&#160; <span class="stringliteral">&quot;_Li2c_ack_wait: \n\t&quot;</span></div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>&#160; <span class="stringliteral">&quot; cln ; clear N-bit ;; 10C + X\n\t&quot;</span> </div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;wait SCL high ;; 12C + X \n\t&quot;</span></div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high \n\t&quot;</span></div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>&#160; <span class="stringliteral">&quot; brmi _Li2c_write_return_false ;; 13C + X \n\t &quot;</span></div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>&#160; <span class="stringliteral">&quot; sbis %[SDAIN],%[SDAPIN] ;if SDA hi -&gt; return 0 ;; 15C + X \n\t&quot;</span></div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>&#160; <span class="stringliteral">&quot; ldi r24,1 ;return true ;; 16C + X \n\t&quot;</span></div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;; 16C + 2X \n\t&quot;</span></div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>&#160;#endif</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>&#160; <span class="stringliteral">&quot;_Li2c_write_return: \n\t&quot;</span></div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low so SCL=H is short\n\t&quot;</span></div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>&#160; <span class="stringliteral">&quot; ret \n\t&quot;</span></div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>&#160; <span class="stringliteral">&quot; ;; + 4 = 17C + 2X for acknowldge bit&quot;</span></div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>&#160; ::</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>&#160; [SCLDDR] <span class="stringliteral">&quot;I&quot;</span> (SCL_DDR), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN), [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN),</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>&#160; [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN), [SDAIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_IN)); </div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>; <span class="comment">// fooling the compiler</span></div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>&#160;}</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>&#160;</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>&#160;uint8_t i2c_read(<span class="keywordtype">bool</span> last)</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>&#160;{</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>&#160; (</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>&#160; <span class="stringliteral">&quot; ldi r23,0x01 \n\t&quot;</span></div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>&#160; <span class="stringliteral">&quot;_Li2c_read_bit: \n\t&quot;</span></div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low ;; 2C \n\t&quot;</span> </div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>&#160; <span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA(prev. ACK);; 4C \n\t&quot;</span> </div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;check for SCL high ;;+2 = 16C+X\n\t&quot;</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high \n\t&quot;</span></div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>&#160; <span class="stringliteral">&quot; brpl _Ldelay_scl_high ;;+2 = 18C+X\n\t&quot;</span></div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>&#160; <span class="stringliteral">&quot;_Li2c_write_return_false: \n\t&quot;</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>&#160; <span class="stringliteral">&quot; clr r24 ; return false because of timeout \n\t&quot;</span></div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_write_return \n\t&quot;</span></div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>&#160; <span class="stringliteral">&quot;_Ldelay_scl_high: \n\t&quot;</span></div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;;+X= 18C+2X\n\t&quot;</span></div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>&#160;#endif</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_write_bit \n\t&quot;</span></div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>&#160; <span class="stringliteral">&quot; ;; +2 = 20C +2X for one bit-loop \n\t&quot;</span></div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>&#160; <span class="stringliteral">&quot;_Li2c_get_ack: \n\t&quot;</span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low ;; +2 = 5C \n\t&quot;</span></div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>&#160; <span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA ;;+2 = 7C \n\t&quot;</span></div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;; +X = 7C+X \n\t&quot;</span></div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>&#160;#endif</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>&#160; <span class="stringliteral">&quot; clr r25 ;; 17C+2X \n\t&quot;</span></div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>&#160; <span class="stringliteral">&quot; clr r24 ;return 0 ;; 14C + X \n\t&quot;</span></div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL ;; +2 = 9C+X\n\t&quot;</span></div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>&#160; <span class="stringliteral">&quot;_Li2c_ack_wait: \n\t&quot;</span></div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>&#160; <span class="stringliteral">&quot; cln ; clear N-bit ;; 10C + X\n\t&quot;</span> </div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;wait SCL high ;; 12C + X \n\t&quot;</span></div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high \n\t&quot;</span></div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>&#160; <span class="stringliteral">&quot; brmi _Li2c_write_return_false ;; 13C + X \n\t &quot;</span></div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>&#160; <span class="stringliteral">&quot; sbis %[SDAIN],%[SDAPIN] ;if SDA hi -&gt; return 0 ;; 15C + X \n\t&quot;</span></div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>&#160; <span class="stringliteral">&quot; ldi r24,1 ;return true ;; 16C + X \n\t&quot;</span></div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;; 16C + 2X \n\t&quot;</span></div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>&#160;#endif</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>&#160; <span class="stringliteral">&quot;_Li2c_write_return: \n\t&quot;</span></div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low so SCL=H is short\n\t&quot;</span></div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>&#160; <span class="stringliteral">&quot; ret \n\t&quot;</span></div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>&#160; <span class="stringliteral">&quot; ;; + 4 = 17C + 2X for acknowldge bit&quot;</span></div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>&#160; ::</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>&#160; [SCLDDR] <span class="stringliteral">&quot;I&quot;</span> (SCL_DDR), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN), [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN),</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>&#160; [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN), [SDAIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_IN)); </div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>; <span class="comment">// fooling the compiler</span></div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>&#160;}</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>&#160;</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>&#160;uint8_t i2c_read(<span class="keywordtype">bool</span> last)</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>&#160;{</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>&#160; __asm__ __volatile__ </div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>&#160; (</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>&#160; <span class="stringliteral">&quot; ldi r23,0x01 \n\t&quot;</span></div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>&#160; <span class="stringliteral">&quot;_Li2c_read_bit: \n\t&quot;</span></div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low ;; 2C \n\t&quot;</span> </div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>&#160; <span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA(prev. ACK);; 4C \n\t&quot;</span> </div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;; 4C+X \n\t&quot;</span> </div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>&#160;#endif</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL ;; 6C + X \n\t&quot;</span> </div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;; 6C + 2X \n\t&quot;</span> </div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>&#160;#endif</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>&#160; <span class="stringliteral">&quot; cln ; clear N-bit ;; 7C + 2X \n\t&quot;</span></div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>&#160; <span class="stringliteral">&quot; nop \n\t&quot;</span></div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;; 4C+X \n\t&quot;</span> </div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>&#160;#endif</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL ;; 6C + X \n\t&quot;</span> </div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;; 6C + 2X \n\t&quot;</span> </div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>&#160;#endif</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>&#160; <span class="stringliteral">&quot; cln ; clear N-bit ;; 7C + 2X \n\t&quot;</span></div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN], %[SCLPIN] ;check for SCL high ;; 9C +2X \n\t&quot;</span> </div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high \n\t&quot;</span></div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>&#160; <span class="stringliteral">&quot; brmi _Li2c_read_return ;return if timeout ;; 10C + 2X\n\t&quot;</span></div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>&#160; <span class="stringliteral">&quot; clc ;clear carry flag ;; 11C + 2X\n\t&quot;</span> </div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>&#160; <span class="stringliteral">&quot; sbic %[SDAIN],%[SDAPIN] ;if SDA is high ;; 11C + 2X\n\t&quot;</span> </div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>&#160; <span class="stringliteral">&quot; sec ;set carry flag ;; 12C + 2X\n\t&quot;</span> </div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>&#160; <span class="stringliteral">&quot; rol r23 ;store bit ;; 13C + 2X\n\t&quot;</span> </div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>&#160; <span class="stringliteral">&quot; brcc _Li2c_read_bit ;while receiv reg not full \n\t&quot;</span></div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>&#160; <span class="stringliteral">&quot; ;; 15C + 2X for one bit loop \n\t&quot;</span> </div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>&#160; </div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>&#160; <span class="stringliteral">&quot;_Li2c_put_ack: \n\t&quot;</span> </div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low ;; 2C \n\t&quot;</span> </div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>&#160; <span class="stringliteral">&quot; cpi r24,0 ;; 3C \n\t&quot;</span> </div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>&#160; <span class="stringliteral">&quot; breq _Li2c_put_ack_low ;if (ack=0) ;; 5C \n\t&quot;</span> </div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>&#160; <span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA \n\t&quot;</span> </div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_put_ack_high \n\t&quot;</span> </div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>&#160; <span class="stringliteral">&quot;_Li2c_put_ack_low: ;else \n\t&quot;</span> </div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>&#160; <span class="stringliteral">&quot; sbi %[SDADDR],%[SDAPIN] ;force SDA low ;; 7C \n\t&quot;</span> </div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>&#160; <span class="stringliteral">&quot;_Li2c_put_ack_high: \n\t&quot;</span> </div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN], %[SCLPIN] ;check for SCL high ;; 9C +2X \n\t&quot;</span> </div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high \n\t&quot;</span></div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>&#160; <span class="stringliteral">&quot; brmi _Li2c_read_return ;return if timeout ;; 10C + 2X\n\t&quot;</span></div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>&#160; <span class="stringliteral">&quot; clc ;clear carry flag ;; 11C + 2X\n\t&quot;</span> </div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>&#160; <span class="stringliteral">&quot; sbic %[SDAIN],%[SDAPIN] ;if SDA is high ;; 11C + 2X\n\t&quot;</span> </div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>&#160; <span class="stringliteral">&quot; sec ;set carry flag ;; 12C + 2X\n\t&quot;</span> </div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>&#160; <span class="stringliteral">&quot; rol r23 ;store bit ;; 13C + 2X\n\t&quot;</span> </div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>&#160; <span class="stringliteral">&quot; brcc _Li2c_read_bit ;while receiv reg not full \n\t&quot;</span></div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>&#160; <span class="stringliteral">&quot; ;; 15C + 2X for one bit loop \n\t&quot;</span> </div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>&#160; </div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>&#160; <span class="stringliteral">&quot;_Li2c_put_ack: \n\t&quot;</span> </div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>&#160; <span class="stringliteral">&quot; sbi %[SCLDDR],%[SCLPIN] ;force SCL low ;; 2C \n\t&quot;</span> </div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>&#160; <span class="stringliteral">&quot; cpi r24,0 ;; 3C \n\t&quot;</span> </div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>&#160; <span class="stringliteral">&quot; breq _Li2c_put_ack_low ;if (ack=0) ;; 5C \n\t&quot;</span> </div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>&#160; <span class="stringliteral">&quot; cbi %[SDADDR],%[SDAPIN] ;release SDA \n\t&quot;</span> </div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>&#160; <span class="stringliteral">&quot; rjmp _Li2c_put_ack_high \n\t&quot;</span> </div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>&#160; <span class="stringliteral">&quot;_Li2c_put_ack_low: ;else \n\t&quot;</span> </div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>&#160; <span class="stringliteral">&quot; sbi %[SDADDR],%[SDAPIN] ;force SDA low ;; 7C \n\t&quot;</span> </div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>&#160; <span class="stringliteral">&quot;_Li2c_put_ack_high: \n\t&quot;</span> </div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;; 7C + X \n\t&quot;</span> </div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>&#160;#endif</div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL ;; 9C +X \n\t&quot;</span> </div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>&#160; <span class="stringliteral">&quot; cln ;clear N ;; +1 = 10C\n\t&quot;</span></div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;wait SCL high ;; 12C + X\n\t&quot;</span> </div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high \n\t&quot;</span></div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;; 11C + 2X\n\t&quot;</span> </div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>&#160;#endif</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>&#160; <span class="stringliteral">&quot;_Li2c_read_return: \n\t&quot;</span></div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span>&#160; <span class="stringliteral">&quot;sbi %[SCLDDR],%[SCLPIN] ;force SCL low so SCL=H is short\n\t&quot;</span></div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>&#160; <span class="stringliteral">&quot; mov r24,r23 ;; 12C + 2X \n\t&quot;</span></div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span>&#160; <span class="stringliteral">&quot; clr r25 ;; 13 C + 2X\n\t&quot;</span></div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>&#160; <span class="stringliteral">&quot; ret ;; 17C + X&quot;</span></div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>&#160; ::</div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>&#160; [SCLDDR] <span class="stringliteral">&quot;I&quot;</span> (SCL_DDR), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN), [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN),</div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>&#160; [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN), [SDAIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_IN) </div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>&#160; ); </div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>&#160; <span class="keywordflow">return</span> <span class="charliteral">&#39; &#39;</span>; <span class="comment">// fool the compiler!</span></div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>&#160;}</div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>&#160;</div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;; 7C + X \n\t&quot;</span> </div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>&#160;#endif</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>&#160; <span class="stringliteral">&quot; cbi %[SCLDDR],%[SCLPIN] ;release SCL ;; 9C +X \n\t&quot;</span> </div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>&#160; <span class="stringliteral">&quot; cln ;clear N ;; +1 = 10C\n\t&quot;</span></div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span>&#160; <span class="stringliteral">&quot; sbis %[SCLIN],%[SCLPIN] ;wait SCL high ;; 12C + X\n\t&quot;</span> </div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_wait_scl_high \n\t&quot;</span></div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>&#160;#<span class="keywordflow">if</span> I2C_DELAY_COUNTER &gt;= 1</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>&#160; <span class="stringliteral">&quot; rcall ass_i2c_delay_half ;delay T/2 ;; 11C + 2X\n\t&quot;</span> </div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span>&#160;#endif</div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>&#160; <span class="stringliteral">&quot;_Li2c_read_return: \n\t&quot;</span></div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>&#160; <span class="stringliteral">&quot; nop \n\t &quot;</span></div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span>&#160; <span class="stringliteral">&quot;sbi %[SCLDDR],%[SCLPIN] ;force SCL low so SCL=H is short\n\t&quot;</span></div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>&#160; <span class="stringliteral">&quot; mov r24,r23 ;; 12C + 2X \n\t&quot;</span></div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>&#160; <span class="stringliteral">&quot; clr r25 ;; 13 C + 2X\n\t&quot;</span></div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>&#160; <span class="stringliteral">&quot; ret ;; 17C + X&quot;</span></div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>&#160; ::</div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>&#160; [SCLDDR] <span class="stringliteral">&quot;I&quot;</span> (SCL_DDR), [SCLPIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_PIN), [SCLIN] <span class="stringliteral">&quot;I&quot;</span> (SCL_IN),</div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>&#160; [SDADDR] <span class="stringliteral">&quot;I&quot;</span> (SDA_DDR), [SDAPIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_PIN), [SDAIN] <span class="stringliteral">&quot;I&quot;</span> (SDA_IN) </div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>&#160; ); </div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>&#160; <span class="keywordflow">return</span> <span class="charliteral">&#39; &#39;</span>; <span class="comment">// fool the compiler!</span></div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>&#160;}</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>&#160;</div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>&#160;</div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>&#160;</div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>&#160;<span class="preprocessor">#error &quot;ONLY SUPPORTED ON AVR PROCESSORS&quot;</span></div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>&#160;<span class="preprocessor">#endif // defined (__AVR__)</span></div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>&#160;</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span>&#160;</div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>&#160;</div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>&#160;</div>
</div><!-- fragment --></div><!-- contents -->
<!-- start footer part -->
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utility/docs/html/annotated.html
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&#160;<span id="projectnumber">1.3.1</span>
&#160;<span id="projectnumber">1.3.2</span>
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<td id="projectalign" style="padding-left: 0.5em;">
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utility/docs/html/class_liquid_crystal.html
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<td id="projectalign" style="padding-left: 0.5em;">
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utility/docs/html/class_liquid_crystal___i2_c.html
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<hr/>The documentation for this class was generated from the following files:<ul>
<hr/>The documentation for this class was generated from the following file:<ul>
<li>/Users/fmalpartida/Documents/development/mercurial repos/SW/NewliquidCrystal/<a class="el" href="_s_i2_c_i_o_8h_source.html">SI2CIO.h</a></li>
<li>/Users/fmalpartida/Documents/development/mercurial repos/SW/NewliquidCrystal/SI2CIO.cpp</li>
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</div><!-- contents -->
<!-- start footer part -->
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<li>B. Perry - *bperrybap.billsworld.billandterrie.com*, with his thoughtful contribution, speed improvements and development support for the SR2W library.</li>
<li>Adrian Piccioli, with his contribution to the i2c GPIO support.</li>
<li><a href="https://github.com/todbot" title="todbot">todbot</a> Tod E. Kurt for the <a href="https://github.com/todbot/SoftI2CMaster" title="softwarei2cmaster">softwarei2cmaster</a> library.</li>
<li><a href="https://github.com/felias-fogg">felias-fogg</a> - Bernhard for the <a href="https://github.com/felias-fogg/SoftI2CMaster" title="softwirei2cmaster">softwarei2cmaster fast</a></li>
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<h4>Contribution guidelines</h4>
<ul>
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