OK, I found the solution myself:
Pin DIO31 has the address 7, not 31.
So the following code does the trick:
// Pmod DA1 - AD7303
DIO.Set(31-24,1); // <-- DIO31 has address 7
for(var i = 0; i < 50 & wait(0.1); i++){
var va = 128+sin(2*PI*i/50)*127;
var vb = 128+cos(2*PI*i/50)*127;
Start();
Write(16, 0x0100 | (va & 0xFF)); // Update DAC A input register from shift register
// Stop();
// Start();
Write(16, 0x2400 | (vb & 0xFF) ); // Load DAC B input register from shift register and update both DAC A and DAC B DAC registers outputs.
Stop();
// output latch pulse:
DIO.Set(31-24,0); // <-- DIO31 has address 7
// wait(0.0001); // without wait(), pulse with is approx. 0.9 ms
DIO.Set(31-24,1); // <-- DIO31 has address 7
}
return "done"
