How to operate GPIO in UEFI?

Discussion in 'UDOO X86' started by binbinboom, Nov 29, 2022.

  1. binbinboom

    binbinboom New Member

    Nov 25, 2022
    Likes Received:
    I have an X86 II board and need to develop an APP on UEFI to operate the touch screen. I see that the X86 II has interfaces (GPOI and I2C of connector CN14) reserved for the touch screen on the Braswell side, but I can't find the API of GPIO. How to operate GPIO under UEFI, such as configuring direction, level and interrupt?

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