Linvincible wrote:
> Hello,
>
> I finally updated to V1.19
> I used the port GPIO 22 to receive/send a signal to a power board that
> cuts cleanly the power after the pi has shutdown
>
> Since upgrade to V1.19l, I can't write in /sys/class/gpio/export any
> more :
>
> tc@piCorePlayer:~$ echo "22" > /sys/class/gpio/export
> sh: write error: Device or resource busy
>
> But I can't see any process locking that file, and the file is empty:
>
> tc@piCorePlayer:~$ sudo lsof /var/lib/dpkg/lock |grep export
> tc@piCorePlayer:~$
>
> Any idea why?
>
> Thanks in advance!
Hi Linvincible,
I don't think we have done anything to change GPIOs. We don't actually
do anything with GPIOs as far as I know.
I'd suggest this code.
Code:
--------------------
$ sudo sh -c 'echo "22" > /sys/class/gpio/unexport'
$ sudo sh -c 'echo "22" > /sys/class/gpio/export'
--------------------
regards
Greg
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