[SOLVED] serial port write with no delay between bytes when sending hex values

Processing Electronics (Arduino, etc.)
1

I’m trying to send hex data out of the FTDI serial port IC at 19200, 8N1. (windows 7, processing 3.3.6)

When I use this code:

public void button2(){
  int i;
  int collect[] = {0x55,0x02,0x50,0xFE,0x20,0x20,0x20,0x20,0x30,0x03};

  intTxCnt+=1;
  print("Sent (dec) " + intTxCnt + " : "); 

  for(i = 0 ; i < collect.length ; i++) 
  {
      myPort.write(collect[i]);
      print(collect[i]);
      print(" ");
  }
  println(" ");
}

There is a roughly 0.6mS to 1.2mS delay between bytes. (I’m using a logic analyzer to see this) (it is easy to see why there is a delay, only one byte is loaded in at a time and windows 7 makes the delay variable)

When a string is written to the serial port, there is no variable delay between bytes:

  myPort.write("hello");

But, what I would like to do is write the hex (binary or non-ASCII) values in the “collect” array without the variable delay between the bytes. Any thoughts on how to do this?

Matt Meerian

1 Like
2

Change collect’s datatype to byte[], and pass it as Serial::write()'s argument.

3 Likes
3

That did the trick, it works wonderfully.
GoToLoop, thanks for the help.
matt