Re: AW: GPIO OF OMAP5912

[Hingkwan Huen <hkh@cypress.com>]

Don't think you can access physical memory directly in user space. You
should use /dev/mem instead.

-kwan

On Tue, 2006-08-29 at 16:08 +0200, LIMITED Nguyen Duong Thanh (CR/AEM
Praktikant) wrote:
> Hello,
> 
> I don't know if my idea help you.
> Maybe the problem is about the libraries in directory /lib/ on OMAP file systems. It doesn't contain the libraries, which your program need.
> 
> Regard,
> Thanh 
> 
> -----Ursprüngliche Nachricht-----
> Von: linux-omap-open-source-bounces@linux.omap.com [mailto:linux-omap-open-source-bounces@linux.omap.com] Im Auftrag von w.b.b
> Gesendet: Dienstag, 29. August 2006 08:44
> An: Linux-omap-open-source@linux.omap.com
> Betreff: GPIO OF OMAP5912
> 
> hi:
> 
>  i want to do some work about OMAP5912'GPIO.but I am failed to do that.
> 
>  the following is a simple program:
> 
> test.c 
> 
> -----------------------------------------------------
> 
> #include <stdio.h>
> #include <unistd.h>
> #include <asm/io.h>
> 
> #define GPIO3_OUT 0xfffbbc40 /* lp1 */
> 
> int main()
> {
>   /* Get access to the ports */
>   
>   
>   /* Set the data signals (D0-7) of the port to all low (0) */
>   outb(0xffff, GPIO3_OUT);
>   
>   /* Sleep for a while (100 ms) */
>   usleep(100000);
> }
> -----------------------------------------------------
> arm-linux-gcc -g test.c -o test.out
> ----------------------------------------------------
> I run the binary file on the omap:./test.out
> -----------------------------------------------------
> but i get the result:segmentation falt!
> ---------------------------------------------------
> who can provide me with information? if you have done work related with gpio,would you like send me some examplefile?                                
>    thanks!
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