[PD] how to pd2stepper motor?

Martin Peach martin.peach at sympatico.ca
Fri Oct 6 15:53:41 CEST 2006

Georg Holzmann wrote:
> Hallo!
>> As far as steppers go it would be nice to have arduino commands for 
>> steppers. It looks like the existing pduino firmware code can only 
>> change one pin at a time, it would be nice to have a parallel digital 
>> pin command with a mask like set_digital_outs(int output_pattern, int 
>> mask) so the set bits in mask would be changed, at the same time, 
>> according to output_pattern and the zero bits would be unaffected.
> AFAIR it is like this - only that the output bits are splitted in 2 
> halfs (7 lower and 7 higher bits) ...
In the Pd_firmware.pde code the pins are set on at a time even if the 
data is sent as two bytes:

      for(i=0; i<7; ++i) {
        mask = 1 << i;
        if( (digitalPinStatus & mask) && !(pwmStatus & mask) ) {
          digitalWrite(i, inputData & mask);


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