Re: TR: interfacing FPGA to AT91RM9200

[arasv@xxxxxxxxxxxxxx]

> Sorry, everything looks fine,
> just looking at irq setup i think it is not necessary to set the pin to
> input and after that immediately to peripheral.
> Wouldn't it be correct just to use:
>
> at91_set_A_periph( reader_irq, 1);
> at91_set_deglitch( reader_irq, 1);
>
> Deglitch will work with peripherals too (looking at figure 27-3, page
> 348 in AT91RM9200 datasheet).

I generally prefer to assume that the pin is in an unknown state, so I
make sure I set everything up so that it is electrically safe.

Does setting the pin as a peripheral automatically make it an input and
disable any prior output setting?

Aras




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