Python GPIO Library for the Rock64 (R64.GPIO)
(11-20-2018, 01:55 PM)pantera Wrote: I can run under Ubuntu, but can't run the test script under Armbian. Using python3 I get:

root@rock64:/home/sas# python3 
Testing R64.GPIO Module...

Module Variables:
Name           Value
----           -----
GPIO.OUT       out
GPIO.IN        in
GPIO.HIGH      1
GPIO.LOW       0
GPIO.RPI_INFO  {'RAM': '1024M', 'PROCESSOR': 'BCM2837', 'TYPE': 'Pi 3 Model B', 'REVISION': 'a22082', 'P1_REVISION': 3, 'MANUFACTURER': 'Embest'}
Error: Unable to export GPIO
Error: Unable to set GPIO direction
Error: Unable to export GPIO
Error: Unable to set GPIO direction

Testing GPIO Input/Output:
You must setup() the GPIO channel ({0} {1}) first
Traceback (most recent call last):
  File "", line 42, in <module>
    var_gpio_state = GPIO.input(var_gpio_out)                   # Return state of GPIO
  File "/home/sas/R64/", line 210, in input
    if validate_direction(channel, 'both') == 0:
  File "/home/sas/R64/", line 118, in validate_direction
    print("You must setup() the GPIO channel ({0} {1}) first").format(gpio_mode, channel)
AttributeError: 'NoneType' object has no attribute 'format'

I was getting a similar error when running the test Python file from the terminal using the Armbian_20.08.1_Rock64_bionic_legace_4.4.213_desktop image. I did get it to work using sudo.

To get it to work without sudo I ran the following command from the terminal based on the discussion at

chmod 4775 

I don't know secure this is but it worked.

I tried the steps from without success.

Messages In This Thread
RE: Python GPIO Library for the Rock64 (R64.GPIO) - by quinterro - 10-08-2020, 05:27 AM

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