Re: AW: GPIO OF OMAP5912

["w.b.b" <rememberme_2000@126.com>]

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 i'm glad to receive your letter. the example gived by http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/#at91gpio 
is not based on the linux operation system. i think it can be debugged in ADS environment.
 how to operate the OMAP5912's gpio pins in embedded linux system? i'v try to apply for resource to linux kernel in my application, but i failed.
    give me a hand!
                                                                          thanks
----- Original Message ----- 
From: "LIMITED Nguyen Duong Thanh (CR/AEM Praktikant)" <DuongThanh.Nguyen@de.bosch.com>
To: "w.b.b" <rememberme_2000@126.com>
Sent: Wednesday, August 30, 2006 4:44 PM
Subject: AW: AW: GPIO OF OMAP5912


Maybe you can find the example here:

http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/#at91gpio 

Cheer
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: Mittwoch, 30. August 2006 04:16
An: Linux-omap-open-source@linux.omap.com
Betreff: Re: AW: GPIO OF OMAP5912

 thanks.
  I get information about how to get use of the hardware in linux,but I am still confused about it.
-----------------------------------------------------------
the following steps about it:
 1. apply for the resource to linux kernel
 2. if you have applied ,then you can do some work about it.
 3.if you have finished ,release the resouce.
-------------------------------------------------------------
 i can only get the physical memory of the registers from the omap process guide.but I don't know their address in linux.
though it's a very basical question,i have to apply for help.
 maybe a simple example can make me understand quickly!
                         thanks
                                    w.b.b

 I 
----- Original Message ----- 
From: "Hingkwan Huen" <hkh@cypress.com>
To: "LIMITED Nguyen Duong Thanh (CR/AEM Praktikant)" <DuongThanh.Nguyen@de.bosch.com>
Cc: "w.b.b" <rememberme_2000@126.com>; <Linux-omap-open-source@linux.omap.com>
Sent: Wednesday, August 30, 2006 12:50 AM
Subject: Re: AW: GPIO OF OMAP5912


> 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!
>> _______________________________________________
>> Linux-omap-open-source mailing list
>> Linux-omap-open-source@linux.omap.com
>> http://linux.omap.com/mailman/listinfo/linux-omap-open-source
>> 
>> 
> 
>


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