setDTR not doing anything

Portos

I've been using processing 2.2.1 to try to get some serial communication going. The serial javadoc no longer exists so it's a bit hard stumbling in the dark but I managed until now.

I need to control the DTR pin to keep it HIGH but the setDTR command is doing nothing at all.

import processing.serial.*; 

Serial myPort;    // The serial port


void setup() { 
  size(400,200); 
  println(Serial.list()); 
  myPort = new Serial(this, "COM9", 115200); 
  myPort.setDTR(true);



} 

void draw ()
{

}

This is just supposed to open the port and set the DTR pin to HIGH... but it doesn't do that. I put my oscope on the board and the DTR pin is LOW.

Am I doing something wrong in assuming setDTR will do this?

PhiLho

https://github.com/processing/processing/blob/master/java/libraries/serial/src/processing/serial/Serial.java line 418, there is comment that might be relevant.

Portos

I am fine with the DTR causing a reset at open but I'd like to switch it to HIGH afterwards. It does not seem to be doing that because I checked the pin using my oscilloscope and it's always low.

BTW I am using windows. Is there a way to force DTR to high on windows?

Portos

Soooo

For some reason setDTR does not work if I put it in the setup()

If I put it in a separate procedure

void keyPressed()
{
   myPort.setDTR(false); //or true      
}

IT WORKS! This is a very strange bug. Probably system dependent?