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RE: How to handle IRQ0 interrupt?
Hi,
I have confiured the interrupt as positive edge triggered interrupt
using the api
cyg_interrupt_configure(interrupt,level,up);
Then it stopped giving interrupt continuously and not interrupting even
when the button is pressed.
This is the code I am using to set up the PIO
*AT91C_PIOB_PDR = 0x20000000; //PB29 - corresponds to IRQ0
*AT91C_PIOB_ASR = 0x20000000;
*AT91C_PIOB_BSR = 0x0;
Is there any thing that I am missing? Any suggestions what else can be done?
Regards,
Neeraja.
Paul D. DeRocco wrote:
>
>> From: Neeraja
>>
>> I am working on at91rm9200 board. I want to catch the
>> interrupt when the button is pressed which is connected to IRQ0 line.
>> But what is happening is that when I run the application
>> the interrupt isr is being called always irrespective of the
>> button press.
>
> Do you mean it interrupts over and over, and never leaves time for the
> application? This can happen if it's programmed to be level-sensitive
> instead of edge-sensitive.
>
> Also, remember that mechanical switches need debouncing. This is why I
> prefer polling switches at a 10ms-20ms rate, since that's fast enough for
> human input, and slow enough not to see the bounce.
>
> --
>
> Ciao, Paul D. DeRocco
> Paul mailto:pderocco@ix.netcom.com
>
>
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