PWM Fails on PocketBeagle - "RuntimeError: Problem with the cape manager" #286
Description
I have been trying to get PWM working on pins P2_01 and P2_03 on the PocketBeagle but have been unsuccessful. I am using Debian 9.5 and have installed the Adafruit-BBIO library. I do have digital outputs working but no PWM. I wrote a short program to test PWM as seen here:
import Adafruit_BBIO.PWM as PWM
pin_l = "P2_1" # GPIO050 (A PWM1) - Left Motors Pin
pin_r = "P2_3" # GPIO023 (B PWM2) - Right Motors Pin
DC_l = 100 # Duty Cycle in % from (0-100) - Left Motors Pin
DC_r = 100 # Duty Cycle in % from (0-100) - Right Motors Pin
PWM.start(pin_l, 0, 1000) # Start PWM on Left Motors Pin
PWM.start(pin_r, 0, 1000) # Start PWM on Right Motors Pin
while 1:
PWM.set_duty_cycle(pin_l, DC_l) # Set PWM on Left Motors Pin
PWM.set_duty_cycle(pin_r, DC_r) # Set PWM on Right Motors Pin
PWM.stop(pin_l)
PWM.stop(pin_r)
PWM.cleanup()
When I run this program I get the below error:
Traceback (most recent call last):
File "/var/lib/cloud9/pwm.py", line 9, in <module>
PWM.start(pin_l, 0, 1000) # Start PWM on Left Motors Pin
RuntimeError: Problem with the cape manager
As you can see, the program fails when starting PWM on the first pin and I have been unable to solve this issue. Also, this code does work perfectly fine on the BeagleBone Black after changing the code to use its PWM pins.
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