问题
I installed the Adafruit_BBIO module on my BBB (I downloaded it from github and installed manually). The GPIO works just fine but when I try to use the ADC I get an error as follows:
import Adafruit_BBIO.ADC as ADC
ADC.setup()
The error:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
RuntimeError: Unable to setup ADC system. Possible causes are:
- A cape with a conflicting pin mapping is loaded
- A device tree object is loaded that uses the same name for a fragment: helper
I couldn't find an answer for this problem. Should I just use an older version of ubuntu?
Thanks!
回答1:
The problem was solved. You can fine the solution here: https://github.com/adafruit/adafruit-beaglebone-io-python/issues/127#issuecomment-266049880
In short, all you need to do is:
echo cape-universaln > /sys/devices/platform/bone_capemgr/slots
来源：https://stackoverflow.com/questions/41028021/adafruit-bbio-adc-setup-on-ubuntu-16-04-1-error