[En-Nut-Discussion] GPIO Level change IRQ problem on SAM7

[Ole Reinhardt]

Hi all,

I just encountered a problem with the GPIO level change interrupt. I use
the IRQ pin to track an RFID signal. Therefore I get level change
interrupts quite fast.

After a short time the interrupt generation now stops.

I could avoid the problem when initalizing the sig_PIOB as level
sensitive instead of edge sensitive.

Had anyone else similar problems before? I remember we just had the same
problem with the USART interrupt on some AT91 derivates.

Most of the interrupt handlers are triggered edge sensitive in NutOS
perhaps we should check again every single case if edge or level
sensitive triggering would be better.

Regards,

Ole Reinhardt

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