Michel/arduino-timex-datalink-notebook-emulator
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Use explicit command and data modes.

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This commit is contained in:
Maxwell Pray
2022-09-01 13:34:18 -07:00
parent b207077137
commit c8733448b9
1 changed files with 33 additions and 20 deletions
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timex-datalink-arduino.ino
+33 -20
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@@ -3,14 +3,15 @@
#define LED_ON_MS 35
#define LED_OFF_MS 460
#define HANDSHAKE_STOP 'U'
#define HANDSHAKE_START '?'
#define COMMAND_PING 'x'
#define COMMAND_QUERY '?'
#define COMMAND_TRANSMIT 'U'
#define HANDSHAKE_PAYLOAD "M764"
#define PING_EXPIRE_MS 1000
unsigned long last_ping_ms = 0;
bool send_handshake = true;
bool command_mode = true;
void led_emit_0() {
digitalWrite(LED_PIN, HIGH);
@@ -32,31 +33,43 @@ void led_emit_byte(uint8_t serial_byte) {
}
}
void emulate_notebook_adapter(uint8_t serial_byte) {
void emulate_notebook_adapter_command(uint8_t serial_byte) {
switch(serial_byte) {
case COMMAND_PING:
Serial.write(COMMAND_PING);
break;
case COMMAND_QUERY:
Serial.print(HANDSHAKE_PAYLOAD);
Serial.write(0);
break;
case COMMAND_TRANSMIT:
Serial.write(COMMAND_TRANSMIT);
command_mode = false;
break;
}
}
void emulate_notebook_adapter_data(uint8_t serial_byte) {
if (millis() - last_ping_ms > PING_EXPIRE_MS) {
send_handshake = true;
command_mode = true;
}
Serial.write(serial_byte);
switch(serial_byte) {
case HANDSHAKE_START:
if (send_handshake) {
Serial.print(HANDSHAKE_PAYLOAD);
Serial.write(0);
}
return;
case HANDSHAKE_STOP:
send_handshake = false;
break;
}
last_ping_ms = millis();
}
void emulate_notebook_adapter(uint8_t serial_byte) {
void(*function)(uint8_t) = command_mode ? emulate_notebook_adapter_command : emulate_notebook_adapter_data;
function(serial_byte);
}
void setup() {
Serial.begin(9600);
pinMode(LED_PIN, OUTPUT);