Hi All,
I have a new BBB. I'm trying to read voltages from a DC power supply. I'm
having trouble doing so. I connected the output from the power supply to
AIN0, and the ground from the power supply to the ADC_GND, and tried to run
the code, but the voltages that I'm reading doesn't make sense.
So I went back to the basic, and just ran the code without plugging
anything in, and yet the voltage value I'm printing says 1.6 instead of 0.
Below shows the code, which I got from adafruit. I'm aware that I'm not
supposed to connect BBB ADC to anything above 1.8V or below 0V, which I
don't believe I have.
import Adafruit_BBIO.ADC as ADC
> ADC.setup()
> value = ADC.read("P9_40")
> voltage = value * 1.8
> print (voltage)
https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/adc
I've also been reading somewhere that I may have to enable the ADC before I
can read it??
Help?
Thanks.
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