Hi Lissandro,
I am interested in how you did it.
Can I have some hint about your method to achieve such high speed?
I don't use a 7300 board, but a 7500 board instead.
Perhaps your method could be applied on the 7500 too?
Thanks.
--- In Lissandro <> wrote:
>
> Hi
>
> I´ve being struggling with the 7300 board in order to make a small software
> that
> would make a faster use of GPIOs.
>
> Well maybe I should try other interfaces, but anyway my question is.
>
> - While having a 200 MHz ARM running in the board, so far I was able to make
> I/O
> changes using the sample code and mmap that have reached nearly 13MHz speed
> (say, a 7MHz or so "square" wave output). I think one should be able to put
> out
> something like a 50 MHz sq wave or even more, doing some direct I/O. In order
> to
> accomplish that, I should run the software in kernel mode? Or is there any
> other
> way.
>
> Thanks :-)
>
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