On Thu, 15 Jul 2010, Simon wrote:
> Hi, I've been using the peekpoke instructions as inline assembly and they
> work perfectly. However, I was wondering if there's a way, using inline
> assembly, to use these functions without mmap'ing. Maybe set some flags
> that'd let me control the memory locations directly?
>
> I just want to be able to communicate with the GPIO ports directly
> instead of having to go through virtual memory mapping. Is there a way to
> do this?
Not without having to go through virtual memory mapping.
You can do it without using peekpoke functions.
Once you have addresses mmap'ed, or addresses calculated from mmap'ed base
addresses, you can use them directly. There is example code around.
If stuck check out the ts7200.c file in any of my programs.
cheers
Jim
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HomePage: http://www.comp.leeds.ac.uk/jj
TS7200 Page: http://www.comp.leeds.ac.uk/jj/linux/arm-sbc.html
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