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How to identify GPIO no.

vasu vallabhaneni
Prodigy 250 points

Hi

      How can we identify the GPIO number of particular GPIO bank pin. For example GPIO bank(7), pin no 4. I would like to know the gpio no for requesting the status of gpio. I am using gpio_get_value(gpio no) function.

  • 0
    TI__Genius 14405 points

    Vasu,

    It appears that the gpio_get_value function is a linux function. Am I correct? Please also provide basic information such as device, software version, etc.

    regards,

    Paul

  • 0
    Guru 26430 points

    The board files (board-da830-evm.c, board-da850-evm.c, etc.) use a macro call GPIO_TO_PIN to map from bank/pin to ordinal pin. In your example, GPIO_TO_PIN(7,4). The macro is defined in the arch/arm/mach-davinci/include/mach/gpio.h. Including linux/gpio.h should eventually include the other gpio.h. All this might not apply to your processor. Check your specific board.c for examples.