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Trying to toggle gpio0_26 on the header 14

Imran Khan14
Intellectual 290 points

Hi Forum,

 

I am trying to toggle BBB pin at U-Boot stage; at it offer gpio utility at the u-boot prompt.

The pin is selected there were a LED installed. By toggling this pin the LED should on/off state?

At the u-boot session. but not happening... ANY clue...please

  • 0
    TI__Guru**** 161600 points
    Hi,

    GPIO0_26 is muxed on the expansion header P8 -> pin 14. If you connect a led on that header pin, then yes when toggling the gpio you should see the led blink.

    However, make sure that gpio0_26 is not used by any other module, check dts files. Also you may need to toggle some device pads from kernel space (due to access rights).
    Another thing to check is if the corresponding am335x pad/ball is not used by another module: GPMC, MMC, PRU etc.. (see all possibilities for ball T11).

    Best Regards,
    Yordan