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work with GPIO omap-138 it seems impossible

Hello world

Am using omapl138EVm and I want to write the values to the gpio only OUTPUT pins , I do not see any application ( project) where is shown how use this ones ,I sow under bsp of EVM some project but it only use input gpio (GPI) and under interrpt condtion ,I want use output to toggle these ones and check timing , can you tell me the way to set the  gp out.

I used the link "BIOS PSP Release version 01.30.00.05". I will also post the link here:
http://software-dl.ti.com/dsps/dsps_registered_sw/sdo_sb/targetcontent/psp/bios_psp/1.30.xx/1.30.00.05/BIOSPSP_01_30_00_05

I  download  the folow example it only  contains the GPIO's functions belonging to the driver of the BIOS operating system, I do not understand why  is  so complicated to use the GPIO peripheral. Can someone help me or send me a project of source code about how toggle the GPIO7.12 it is connected to J15 connector of EVM omap-138

your help will be greatly appreciated!!!!!!!

Shush..