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Code Issues Releases Activity

fixed a problem in codebuild.c --> speed for st7920, 10x speed up for SPI mode of st7020, issue #87

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olikraus
2016-11-26 12:48:09 +01:00
parent ef662477d9
commit 01e3292575
7 changed files with 62 additions and 39 deletions
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cppsrc/U8x8lib.cpp
+29 -22
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@@ -210,36 +210,43 @@ extern "C" uint8_t u8x8_byte_arduino_4wire_sw_spi(u8x8_t *u8x8, uint8_t msg, uin
{
case U8X8_MSG_BYTE_SEND:
data = (uint8_t *)arg_ptr;
while( arg_int > 0 )
{
b = *data;
data++;
arg_int--;
for( i = 0; i < 8; i++ )
{
if ( b & 128 )
*arduino_data_port |= arduino_data_mask;
else
*arduino_data_port &= arduino_data_n_mask;
b <<= 1;
for( i = 0; i < 8; i++ )
{
if ( b & 128 )
*arduino_data_port |= arduino_data_mask;
else
*arduino_data_port &= arduino_data_n_mask;
b <<= 1;
if ( not_takeover_edge != 0 )
*arduino_clock_port |= arduino_clock_mask;
else
*arduino_clock_port &= arduino_clock_n_mask;
/* AVR Architecture is very slow, extra call is not required */
//u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->sda_setup_time_ns);
if ( takeover_edge != 0 )
*arduino_clock_port |= arduino_clock_mask;
else
*arduino_clock_port &= arduino_clock_n_mask;
/* AVR Architecture is very slow, extra call is not required */
//u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->sck_pulse_width_ns);
}
if ( not_takeover_edge != 0 )
*arduino_clock_port |= arduino_clock_mask;
else
*arduino_clock_port &= arduino_clock_n_mask;
/* AVR Architecture is very slow, extra call is not required */
//u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->sda_setup_time_ns);
if ( takeover_edge != 0 )
*arduino_clock_port |= arduino_clock_mask;
else
*arduino_clock_port &= arduino_clock_n_mask;
/* AVR Architecture is very slow, extra call is not required */
//u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->sck_pulse_width_ns);
}
}
}
break;
case U8X8_MSG_BYTE_INIT: