Sawtooth waveform with Arduino Due

// Public Domain
// More information: http://www.cmiyc.com/blog/2013/02/07/sawtooth-waveform-with-the-arduino-dues-built-in-dac/

void setup() {
// None, analogWrite() sets up pin state
}

void loop() {
  // Simple sawtooth waveform
  for(int x=0; x<255; x++) {
    analogWrite(DAC0, x);
  }
}