1 Reply Latest reply on Jul 11, 2015 5:04 AM by xbolshe

    How to disable completely the pull up resistors on intel edison arduino on the I2C line

    ByReaL

      i tried changing values in /sys/kernel/debug/gpio_debug/gpioXYZ/available_pullmode

      and setting it to nopull

      but either i'm not getting the right GPIO number corresponding to the pins labeled A4 and A5 on intel edison

      or when i use lib mraa to communicate via I2c the pull up resistors are activated again.

       

      how do you deactivate the pull up resistors ?

      what are the correct gpio numbers for the pins corresponding to A4 A5 (based on documentation should have been either 19 and 20 or 27 and 28) i changed those with no luck.

       

      asking this because my I2C sensor has also pull up resistors and i want to disable the edison internal ones.