6 Replies Latest reply on Jul 8, 2016 12:06 PM by 0andriy

    GPIO Pins - I2C IO Expanders

    NicolaUB

      Hi All,

       

      I'm using Edison with kit for Arduino board. I cannot find where are defined/mapped pins as GPIO pins while they are IO Expanders outputs.

      For example GPIO243 is the IO1.3 pin of U16 chip (an IO Expander).

       

      Then, in which point kernel is learned to search IO expanders at I2C addresses 0x20, 0x21, 0x22 and 0x23.

       

      Thank you in advance,

       

      Nicola