AM335x Pin Toggle (Linux)

aly mohamed

Hi,

i m developing on SK AM335x , i m running linux (SDK 05.05.01.00) .. what i want to do is to toggle a pin .. i have a Userspace Application and a Kernel Module working on SPi..

so first i want to toggle a Pin in a Kernel Module

i want to use one of the user leds LED1-3 above the Power on Button beacause they are not blinking and the OS is not using them.. there must be a driver somewhere to use this Leds ?!?!?

i ve no plan what to do beacause i dont find any kernel Source ( gpio Driver or somthing ) accesing the Hardware .. so what can i do ?

Edit:

somewhere i found

gpio_set_value(NFC_PWRUP_GPIO, 0);
gpio_set_value(NFC_PWRUP_GPIO, 1);

i guess this toggles a pin ?!?! ... but what are the PinNummbers for the User Leds ?? Is there a list of all Pin Nummbers of the Microcontroller ?!?

IF YOU HAVE AN IDEA HOW TO TOGGLE ANY OTHER PIN IT WOULD ALSO BE OK .... LIKE (J8 / I2CHeader ) !?!?

thanx a lot

best regards

aly

over 13 years ago

0 Dave Gerlach over 13 years ago

TI__Intellectual 1830 points

Hi Aly,

You can find the documentation on the GPIO driver here: http://processors.wiki.ti.com/index.php/GPIO_Driver_Guide

Regards,

Dave

0 aly mohamed over 13 years ago in reply to Dave Gerlach

Prodigy 110 points

Hi,

how can i find out which pins which nummbers have ?? the Mapping for the AM335x SK .??

gpio_get_value(30);

as example i want to use one of the I2C Pins  (J8 / I2CHeader : AM335X_I2C0_SCL , AM335X_I2C0_SDA)

thanx Dave ,

and best regards,

aly

0 Dave Gerlach over 13 years ago in reply to aly mohamed

TI__Intellectual 1830 points

Aly,

I would recommend reviewing Section 2 of the AM335X DataSheet or downloading the PinMux utility (http://www.ti.com/tool/pinmuxtool). You can download the configuration for the SK board here: http://processors.wiki.ti.com/index.php/AM335xStarterKitHardwareUsersGuide#Pin_Use_Description.

Regards,

Dave

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AM335x Pin Toggle (Linux)