imx53 quick start board

[victorsaldaña]

Estoy aprendiendo a usar la iMX53 QSB con s.o ubuntu, que viene con el kit.

Quisiera conseguir algun ejemplo, sencillo de como usar los interruptores de usuario 1 y 2, para manipular el encendido del LED para usuario (D16), para hacer un ejemplo de como programarlos.

Saludos

[igorpadykov]

Hi Victor

please start with link below

FAQ All Boards GPIO Test

In file mx53_loco.c file the  GPIO2_14 and GPIO2_15 are

configured and registered under gpio-keys. If you want to control

this GPIO using SYS interface you need to comment out the next lines

static struct gpio_keys_button loco_buttons[] = {

        GPIO_BUTTON(MX53_nONKEY, KEY_POWER, 1, "power", 0),

/*      GPIO_BUTTON(USER_UI1, KEY_VOLUMEUP, 1, "volume-up", 0),

        GPIO_BUTTON(USER_UI2, KEY_VOLUMEDOWN, 1, "volume-down", 0), */

};

Moreover, be sure that you have selected

--Device Drivers

   ---GPIO Support

     -- /sys/class/gpio (sysfs interface)

Recompile your kernel and replace it by the current one and you would

control these GPIO as the LED on the QSB.

Using KEY_ROW4  GPIO4[15] :  32*3 +15=111

echo 111 > /sys/class/gpio/export

echo "out" > /sys/class/gpio/gpio111/direction

value=/sys/class/gpio/gpio111/value

echo 1 > $value;

echo 0 > $value ;

Best regards

chip

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"In theory there is no difference between theory and practice, but in practice there is."  [Murphy's laws]

[victorsaldaña]

Por ser principiante en el uso del iMX53 QSB tengo preguntas muy básicas, a la respuesta dada.

1.- Donde se encuentran los archivos In file mx53_loco.c file?

2.- Lo referente a "Moreover, be sure that you have selected"  en que parte lo tengo que seleccionar?.

3.- "Recompile your kernel and replace it by the current one" Como se debe realizar, con que instrucción y si esta es ejecutada desde la terminal de Ubuntu,  ?

4.- Using KEY_ROW4  GPIO4[15] :  32*3 +15=111   a que se refiere?

[igorpadykov]

Sorry, Victor

seems you chose incorrect

selection in your google translator.

Please select "english" tab. :smileyhappy:

Best regards

chip

[victorsaldaña]

Due to I'm begginer in imx53 i have some basic question.

1.- Where can I found files mx53_loco.c file?

2.- About  "Moreover, be sure that you have selected"  in which part I have to select this?.

3.- "Recompile your kernel and replace it by the current one"  As you must realize, that if this instruction is executed from the terminal of Ubuntu?

4.- Using KEY_ROW4  GPIO4[15] :  32*3 +15=111   referred to this instruction? Where can i to do this?

Best Regards

[igorpadykov]

Hi Victor

I would suggest to start with 1) [Where can I found files mx53_loco.c file]

and build ltib.

L2.6.35_11_09_ER_SOURCE : Linux 2.6.35 Source Code Files and documentation

11.09. Supports MCIMX53-START and MCIMX53-START-R.

http://cache.freescale.com/files/dsp/doc/app_note/AN3875.pdf

Building a Linux Image and Downloading onto i.MX Processors Using a Virtual ... (REV 1)

Please read documentation and try to build ltib, in sources you will find

mx53_loco.c file. AN3875 explains how to use ltib.

Best regards

chip