If you are doing low frequency stuff you can treat the GPIO lines as files. They are located in /proc/gpio
just open the I/o line you want such as "/proc/gpio/GPIO66" etc and then fprint or fwrite "GPIO out set" or "GPIO out clear" to set the logic level for that bit.
Sometimes you may need to change the tristate state of the line before you use it. This can easily be done with a script.
Scott Harris wrote:
I need to generate a square wave on a gumstix GPIO pin in order tor drive a
piezo buzzer for user feedback. I'd like to achieve this in python if
possible, but I'm not averse to writing some C code to do fiddle with
pxaregs. I also need the beeper code not to block my main python loop, since
that code is pretty busy.
Does anyone have some suggestions on a minimum hassle path to achieve this?
Thanks,
-Scott
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Re: Producing a square wave on a gumstix GPIO
