Re: [Gumstix-users] gpio regs from user space

[<tim...@co...>]

Hi Chuck,

Let me know if this works and I will update the wiki.

Thanks
Tim

 -------------- Original message ----------------------
From: "Sam Green" <sam...@gm...>
> Hi Chuck,
> 
> Try modifying the mmap() calls in gpregs.c to look like:
> 
>     map = mmap(0,
>               MAP_SIZE,
>               PROT_READ | PROT_WRITE,
>               MAP_SHARED,
>               fd,
>               #ifdef __ARM_EABI__
>                   0x40E00000 / MAP_SIZE
>               #else
>                   0x40E00000 & ~MAP_MASK
>               #endif
>              );
> 
> Comes from 
> http://thread.gmane.org/gmane.linux.distributions.gumstix.general/21437/focus=21
> 476
> 
> -Sam
> 
> On 3/10/07, chuck kamas <chu...@ya...> wrote:
> > Hi all,
> >
> > I compiled the code for the gpio registers found at:
> > http://docwiki.gumstix.org/Sample_code/C/gpregs
> >
> > but when I run it I get:
> > Unhandled fault: imprecise external abort (0xc16) at 0x40000060
> > Bus error
> >
> > when I ported this into my own code I get a segfault when I try to set a
> > GPIO register.
> >
> > Has anyone else compiled this code and gotten it to work?  My build_root is
> > 1200.
> >
> > Chuck
> >
> >
> >
> >
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