#144 GPIO apf27_dev Error: Device or resource busy

[Nasr]

Hello,

I'm trying to command GPIO pins with the last release 5.3 on apf27_dev . the problem is that I can't control the GPIO pin PF14. this GPIO is always blinking by default when the apf27 is running.I think that there is a process which is using this pin so I can't control it.
if I try to command the PF14 pin I get this message :Error: Device or resource busy

[Fabien M]

Yes it's normal, because resource is busy. It is used by the led driver :
http://www.armadeus.com/wiki/index.php?title=LED

If you want to use the GPIO PF14 as a gpio you have to desactivate the
led driver at kernel compilation.

Regards,

[Nasr]

Thank you, it's working now!

[Fabien M]

Hi Nasr,

Hello,

I'm trying to command GPIO pins with the last release 5.3 on apf27_dev . the problem is that I can't control the GPIO pin PF14. this GPIO is always blinking by default when the apf27 is running.I think that there is a process which is using this pin so I can't control it.
if I try to command the PF14 pin I get this message :Error: Device or resource busy

Yes it's normal, because resource is busy. It is used by the led driver :
http://www.armadeus.com/wiki/index.php?title=LED

If you want to use the GPIO PF14 as a gpio you have to desactivate the
led driver at kernel compilation.

Regards,

Fabien Marteau
FPGA expert & Hardware Engineer
Tel: +33 (0)9 72 29 41 44
Fax: +33 (0)9 72 28 79 26
ARMadeus Systems - A new vision of the embedded world
http://www.armadeus.com

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