Background: I'm very well versed in Max, but still a newbie in Pd.

I'm working on a project to that will use Pd running on a Raspberry Pi, and that will generate control voltages using external DACs (ideally something like a MCP4922 or similar, http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en020399 ).

I know about Miller Puckette's gpio external, found here: http://crca.ucsd.edu/~msp/syllabi/206.13w/index.htm , but it does not do any SPI interfacing, which is the way that I will need to interface with the DACs. I also don't think that the comport object does any SPI interfacing either.

Right now it looks like my only option is to write an external program in C or Python or something, and invoke it with shell commands from Pd. But since I suck at C/Python/etc, I was hoping that there might be a way to do this all directly within Pd?

Thanks in advance,
Dan

Hello Dan,

Did you find something on this problem?
I'm exactly at the same point... I'll tell you if I find something.

Cheers

Hi valkiri - unfortunately no, I paused work on this project because I hit the wall above. Would be very interested if you have success!

Hello,

If I understood your problem well, I would advice you to check PDuino. By connecting an arduino to your raspberry pi, you can interact easily with physical stuff. Arduino is connected to the raspberry via an SPI interface oyu can managed in Pure data using the PDuino patch.

Best,

Plankton

fwiw, here's a few things to interface a SPI device with pd (FUDI, midi or osc). should be fairly easy to adapt to one's needs:

adc2FUDI.c, adc2midi.c :
https://github.com/mxmxmx/rpio
adc2osc.c :
https://github.com/constantin3000/PiCollider