SoftwareSerial for Arduino Due

Hardware Arduino Due
10

Thanks to you all for your answers.

I think I will try again Hardware Serial. First time I tried it was with Atmega328p and it failed. Then when I upgraded to Mega2560 I did not try again because the software was very stable then. But since I have to rewrite half of the program (LCD panel is going to be replaced by a 5" TFT display so the whole HMI must be rewritten) there is space for many tests :stuck_out_tongue:

However here is the software (for Atmega2560):
http://luca72.xoom.it/td5mapsuiteweb/archive/td5opencom/td5opencom11q.zip

OBD2 communication management is in file td5comm.cpp, this is the read/write part:

boolean Td5Comm::read_byte(byte * b)
{
  int readData;
  boolean success = true;
  byte t=0;

  //digitalWrite(ledPin, HIGH);
  while(t != READ_ATTEMPTS  && (readData=obdSerial.read())==-1) 
  {
    delay(1);
    t++;
  }
  //digitalWrite(ledPin, LOW);

  if (t >= READ_ATTEMPTS) 
  {
    success = false;
  }

  if (success)
  {
    *b = (byte) readData;
  }

  return success;
}

void Td5Comm::write_byte(byte b)
{
  //digitalWrite(ledPin, HIGH);
  obdSerial.write(b);
  delay(Td5RequestByteDelay);  // ISO requires 5-20 ms delay between bytes.
  //digitalWrite(ledPin, LOW);
}

If somebody can give me some suggestions they are very welcomed :slight_smile:

Thanks again,
Luca