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Here’s a tutorial how to AVOID bit-banging and use the hardware via C (while still in Python), shared by Louis Thiery in the Adafruit Forums. And here is the code in Github.
This implementation of SPI in Python is hardware based. Linux-level C code is compiled as a Python module. I first learned how to get SPI working on the Raspberry Pi with help from a tutorial by Brian Hensley. However, I love Python and I wanted to use this hardware implementation of SPI from within Python. I little searching told me that what I wanted to do was to “extend” Python with C and so this reference was very helpful.
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A little confused, how is this different from the SPI support that is already in occidentalis?
Comment by Adam Haile — January 11, 2013 @ 9:27 am
There is a Python module for SPI called py-spidev. https://github.com/doceme/py-spidev
I found it a few weeks ago when I was writing the Gertboard test suite in Python. IIRC it was Jeremy Blythe’s blog where I first heard about it.
Not much documentation though, but I managed to get it working.
Comment by Alex Eames — January 11, 2013 @ 5:30 pm
Oh – this tutorial is supposed to explain how to NOT bit-bang SPI in Python…
I didn’t know about the py-spidev before I wrote my library. It pretty much lines up exactly with what I did
Comment by Louis Thiery — January 11, 2013 @ 8:11 pm