DIY SIO2USB

[chessplayerjames]

I think I am very close to it working.  I am using the following code in Arduino:

 

Spoiler

void setup() {
  Serial.begin(19200);
  Serial1.begin(19200);
}

void loop() {
  if (Serial.available()) {      // If anything comes in Serial (USB),
    Serial1.write(Serial.read());   // read it and send it out Serial1 (pins 0 & 1)
  }

  if (Serial1.available()) {     // If anything comes in Serial1 (pins 0 & 1)
    Serial.write(Serial1.read());   // read it and send it out Serial (USB)
  }
}

AspeQt gives a "get status" message when I turn the Atari on, but doesn't really get past that.  Cannot save (or load) anything.  I have the Ground pin connected, and the TX and RX pins connected to their respective slots in the SIO cable.

[chessplayerjames]

Ok, I finally got it to work (turns out, I was supposed to connect to different pins on the arduino).  Does anybody know how I could connect the Command Line and have this used in the SIO chain? I'd love to be able to back-up all of my old floppy discs.

[TGB1718]

You could use one of the digital lines in the Arduino to look at the command line 

then in your code you could monitor the command line, I assumed in your code

Serial is from the Atari and Serial1 is to the Atari

#define COMMAND 8

pinMode(COMMAND,INPUT_PULLUP); // may only need INPUT

 

void setup() {
  Serial.begin(19200);
  Serial1.begin(19200);
}

void loop() {

  if(!digitalRead(COMMAND) // COMMAND LOW

 {
      if (Serial.available()) {      // If anything comes in Serial (USB),
      Serial1.write(Serial.read());   // read it and send it out Serial1 (pins 0 & 1)
      }

 }

  if(digitalRead(COMMAND) // COMMAND HIGH

  {

       if (Serial1.available()) {     // If anything comes in Serial1 (pins 0 & 1)
       Serial.write(Serial1.read());   // read it and send it out Serial (USB)
       }

   }
}