tags/firmware/gen3/1.1/ArduinoSlaveExtruder/RS485.h


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void rs485_tx(byte b)
{
  Serial.print(b, BYTE);

  //read for our own byte.
  long now = millis();
  long end = now + 10;
  int tmp = Serial.read();
  while (tmp != b)
  {
    tmp = Serial.read();
	if (millis() > tmp)
		break;
  }
}