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xtacocorex / CHIP_IO

A CHIP IO library for Python: IO+PWM+SPWM+ADC+Utilities
MIT License
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Error setting up channel X #57

Closed nio101 closed 7 years ago

nio101 commented 7 years ago

Hello,

Once a python script using CHIP_IO has exited, when I try to run it again, even with using GPIO.cleanup() before setting up the IO, I'm getting an error:

GPIO.setup(set, GPIO.OUT)
RuntimeError: Error setting up channel CSID2, maybe already exported? (gpio_export: could not write '134' to /sys/class/gpio/export (Device or resource busy))

Is there any workaround to be able to run my script again, without rebooting? Thanks.

xtacocorex commented 7 years ago

So, it looks like your script isn't unexporting CSID2, so when you start it again, it's throwing the error.

What does your full script look like? I think you might not be cleaning up the GPIO properly.

There is a way to deal with this, the Utilities module. You can do the following at the beginning of your script:

import CHIP_IO.Utilities as UT
UT.unexport_all()

The above will work, but it doesn't solve the error of the GPIO not being cleaned up.

nio101 commented 7 years ago

Thank you, I will try this, and also handle correctly the signal supervisord is sending to my script to gracefully shut it down... :)

xtacocorex commented 7 years ago

@nio101, you still have issues with cleanup? My latest commits here fix it for good now (hopefully). Just seeing if there is an issue still, otherwise I'll close this.

nio101 commented 7 years ago

No, it's fine for me, you can close it, thank you!