// DAC demo on MT-ARM Boards
// Use an oscilloscope/voltmeter to measure the output voltage

main()
{
   writes("DAC", 500);
   sys(50, 3001); // enable DAC
   loop {
	sys(50, 1023); writei('d', 1023, 500);  // ~3.3V
	sys(50,  512); writei('d',  512, 500);  // ~1.65V
	sys(50,    0); writei('d',    0, 500);  // ~0V
	sys(50,  512); writei('d',  512, 500);  // ~1.65V
   }
   sys(50, 3000); // disable DAC
}