OMAP5912 OSK & GPIO

OMAP5912 OSK & GPIO

[Richard Copeman]

Hi,

Does anybody have any examples for configuring and using the GPIO pins?
I'm trying to toggle GPIO7. I set the data direction bit to output and set
the output pin register bit to high. I have not changed the default pin
muxing, so I assume I should be getting a signal on pin L15, which according
to my schematics is pin 25 on connector P12. I put a scope on there and
don't see anything ;-(

Am I missing some vital part of the puzzle?

Thanks,

Richard.

Re: OMAP5912 OSK & GPIO

[Dirk Behme]

Richard Copeman wrote:
> Hi,
> 
> Does anybody have any examples for configuring and using the GPIO pins?
> I'm trying to toggle GPIO7. I set the data direction bit to output and set
> the output pin register bit to high. I have not changed the default pin
> muxing, so I assume I should be getting a signal on pin L15, which according
> to my schematics is pin 25 on connector P12. I put a scope on there and
> don't see anything ;-(

Try to use GPIO framework. See for example

/arch/arm/mach-omap1/leds.c
/arch/arm/mach-omap1/leds-osk.c

#include <asm/arch/gpio.h>
#include <asm/arch/mux.h>

omap_cfg_reg(P18_1610_GPIO3);  // request pin from pinmux, 
depends on chip
if (omap_request_gpio(3) == 0)      // request GPIO
    omap_set_gpio_direction(3, 0);   // set it to output
omap_set_gpio_dataout(3, 1);        // set it

Regards

Dirk