Michel/arduino-timex-datalink-pytimex
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Add test pin, cleanup and comments

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This commit is contained in:
Simon Larsson
2021-08-10 12:03:37 +02:00
parent 6feafe6675
commit 7ec12dbd19
2 changed files with 74 additions and 48 deletions
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pytimex_test.py
+11 -1
View File
@@ -1,3 +1,7 @@
# Tests out the library and blasts some data
import sys
import pytimex
def listhex(pkg):
@@ -39,8 +43,14 @@ print("Data to be blasted:")
print(listhex(data))
print("")
try:
port = sys.argv[1]
except:
port = "/dev/ttyACM0"
# Initialize blaster
b = pytimex.Blaster("/dev/ttyACM0")
b = pytimex.Blaster(port)
if not b.identify():
print("Could not verify adapter :(")
timex_transcoder/timex_transcoder.ino
+63 -47
View File
@@ -1,23 +1,25 @@
/* Implementation of transcoder behaving more closely to the fabled
* Notebook Adapter. Hopefully, it can be made compatible with the
* original software.
/* Implementation of transcoder, behaving closely to the Notebook
* Adapter. Compatible with the original Timex software.
*
* This code should work on any Arduino with ATmega328 at 16 MHz, such
* as Duemillanove, Uno, Nano, and others.
* This code should work on any Arduino with an ATmega328 at 16 MHz,
* such as Duemillanove, Uno, Nano, and others.
*
* The transmission is paced by the transmission rate between PC and
* Blaster being 9600 baud. Inter-package delay can be done on either PC
* or blaster side. The first case works better with the Python software
* and the latter with the original software. */
/* If this define is enabled, the blasting will be faster. It works fine
* most of the time, but the slower speed will probably be more reliable.
* and I believe the latter with the original software. (TODO: verify)
*/
#undef TURBO_MODE
#define LEDPIN 13
#define IRLED 12
#define CTSPIN 11
/* If TURBO_MODE is defined, the blasting will be faster. It works fine
* most of the time, but the slower speed will probably be more reliable
* in worse lighting conditions.
*/
#define TURBO_MODE
#define LEDPIN 13 /* Onboard LED pin */
#define IRLED 12 /* Comm. LED pin */
#define CTSPIN 11 /* Connect to CTS to reset when using the original software */
#define TESTPIN 10 /* Connect to GND to get a continuous stream of sync bytes */
/* =========== DATA TRANSCODER FUNCTIONS ========================= */
@@ -51,47 +53,47 @@ inline void startTimer(int lowcnt, int hicnt)
#ifdef TURBO_MODE
/* These values are faster than sending using CRT but seems to work most of the time. */
/* These values are faster than the original software sends using the
* CRT, but they seem to work most of the time. */
/* Bit length */
#define BITLEN_L 252
#define BITLEN_H 1
/* Bit length */
#define BITLEN_L 252
#define BITLEN_H 1
/* Bit interval */
#define SPACELEN_L 206
#define SPACELEN_H 28
/* Bit interval */
#define SPACELEN_L 206
#define SPACELEN_H 28
#define INTERBYTE_L 0
#define INTERBYTE_H 180
#define INTERBYTE_PACKAGE 25
#define INTERBYTE_L 0
#define INTERBYTE_H 180
#define INTERBYTE_PACKAGE 25
#else
/* Timing values based more on the CRT timings. */
/* Timing values based more on the CRT timings. */
/* Bit length */
/* 31.78 kHz => 16 MHz / 31.78 kHz ~= 508 counts (Approx 0.0318 ms bit length) */
#define BITLEN_L 252
#define BITLEN_H 1
/* Bit length */
/* 31.78 kHz => 16 MHz / 31.78 kHz ~= 508 counts (Approx 0.0318 ms bit length) */
#define BITLEN_L 252
#define BITLEN_H 1
/* Bit interval */
/* 31.47 kHz / (15-1) => 7118 counts (Approx 0.445 ms between bits, or 0.477 ms bit interval or 2098 baud) */
#define SPACELEN_L 206
#define SPACELEN_H 28
/* Bit interval */
/* 31.47 kHz / (15-1) => 7118 counts (Approx 0.445 ms between bits, or 0.477 ms bit interval or 2098 baud) */
#define SPACELEN_L 206
#define SPACELEN_H 28
/* Mostly a mode-up value that when combined with INTERBYTE_PACKAGE ends up with a sensible delay between packets */
#define INTERBYTE_L 0
#define INTERBYTE_H 220
/* Number of times to repeat interbyte delay between packages */
/* Set this to 0 for compatibility with original software */
#define INTERBYTE_PACKAGE 45
/* Mostly a mode-up value that when combined with INTERBYTE_PACKAGE ends up with a sensible delay between packets */
#define INTERBYTE_L 0
#define INTERBYTE_H 220
/* Number of times to repeat interbyte delay between packages */
/* Set this to 0 for compatibility with original software */
#define INTERBYTE_PACKAGE 45
#endif
bool past55sync;
bool pastAAsync;
unsigned int packetLeft;
bool transmitState;
void setupTranscode()
{
@@ -116,7 +118,7 @@ void transcodeByte(unsigned char curbyte)
{
if (curbyte != 0x55) {
if (!past55sync) {
/* Delay between 0x55-sync and 0xAA-sync - TODO: Test if this is necessary. */
/* Delay between 0x55-sync and 0xAA-sync - TODO: Test if this is necessary; doesn't seem to be. */
//interPacketDelay();
}
past55sync = true;
@@ -160,8 +162,6 @@ void transcodeByte(unsigned char curbyte)
/* ======= MAIN FUNCTIONS =============== */
bool transmitState;
void setup()
{
Serial.begin(9600);
@@ -170,6 +170,7 @@ void setup()
digitalWrite(LEDPIN, LOW);
pinMode(CTSPIN, INPUT_PULLUP);
pinMode(TESTPIN, INPUT_PULLUP);
setupTranscode();
@@ -180,25 +181,41 @@ void loop()
{
unsigned char curbyte;
if (!digitalRead(CTSPIN)) {
transmitState = false;
/* If test pin is low, output sync bytes */
if (!digitalRead(TESTPIN)) {
transcodeByte(0x55);
delay(2);
return;
}
/* If CTS is pulled low, reset transmission state. This controls the
* power to the original device, so essentially resets it.
*/
if (!digitalRead(CTSPIN)) {
setupTranscode();
}
/* Read byte if available */
if (Serial.available()) {
curbyte = Serial.read();
} else return;
/* If we're not in transmit state, handle commands.
* Else, transcode byte.
*/
if (!transmitState) {
/* Handle control bytes */
if (curbyte == 'x') {
/* Knock knock */
Serial.print('x');
} else
if (curbyte == '?') {
/* Device query */
Serial.print("M764");
Serial.write((byte)0);
}
else
if (curbyte == 'U') {
/* Enter transmit state */
transmitState = true;
Serial.print('U');
}
@@ -206,5 +223,4 @@ void loop()
transcodeByte(curbyte);
Serial.write(curbyte);
}
}