Hi Sebastian ! You have suggested me following i2c drivers which follows /dev/i2c framwork : https://git.rtems.org/rtems/tree/c/src/lib/libbsp/arm/atsam/i2c/atsam_i2c_bus.c https://git.rtems.org/rtems/tree/c/src/lib/libbsp/arm/xilinx-zynq/i2c/cadence-i2c.c Can you please provide link to the test case application code for any of above driver ? Thanks, Punit Vara