GPIO callback causing segmentation fault

[guilhermearaujo]

I am attempting to perform some tasks on a rising edge of the P8 14, but everytime after the callback function ends, there's a segmentation fault and the script stops.

The following counter in incremented, the line is properly printed, but right after that comes the error message.

import Adafruit_BBIO.GPIO as GPIO

counterX = 0

def updateEncoderX(channel):
    global counterX
    counterX = counterX + 1
    print "Encoder counter updated: %d" % counterX

GPIO.setup("P8_14", GPIO.IN)
GPIO.add_event_detect("P8_14", GPIO.RISING, callback=updateEncoderX)

try:
    while 1:
        pass

except KeyboardInterrupt:
    GPIO.cleanup()
GPIO.cleanup()

[jwcooper]

Which operating system and kernel are you using?

Are you able to use the add_event_detect without the callback (at the bottom: http://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/gpio)? Mostly just trying to narrow down the issue.

[guilhermearaujo]

Ubuntu, Linux beagle 3.8.13-bone23 #4 SMP Thu Jul 18 13:31:51 CDT 2013 armv7l armv7l armv7l GNU/Linux
Without the callback function, the script runs normally and prints on GPIO.event_detected as expected.

Were you able to reproduce the error?

[jwcooper]

I just tested this on Angstrom, and it worked for me. This might be an Ubuntu specific version issue. The first thing I'd do is update to the latest Ubuntu.

[jwcooper]

Closing this. Please comment, and we can re-open if it's currently an issue.

[ghost]

I have some kind of similar issue. I hope it will be okey if I reopen this issue. Or should I open another issue?