Hi Folks,
I need to sample multiple input lines on the BBB (rev. c) ADC peripheral at a relatively low rate, perhaps 1 kHz, and do some simple filtering and detection.
Is there a kernel mode driver available for this that I can modify? Is kernel mode even necessary or can I use a user space driver?
There seems to be a built-in driver, just Google for 'beagle bone black adc'. I got about 40000 responses, with the first pretty relevant.
There should just be a file you can open and read.
For 1 kHz, you may want to go faster than that. I don't know that you can just open it once, rewind the file and issue a read once every millisecond.
But there's additonal detail here:
Les,
Thanks for that, but these examples are mere toys. If the ADC peripheral TI put on the BBB is similar to the one on the TMS320F28x, then there is a ton of setup required including clock rates, buffering, etc., that none of these extremely simple "read a /sys/device to get a voltage" come near.
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