I am trying to access GPIO peripheral registers from Unprivileged Task, but it fails, and goes to hard fault handler. i have setup the MPU regions, there is not MPU fault. I heard something about setting up CSU, but could not find any reference on how to do it.
Are you using FreeRTOS? If you change to privileged access, does the peripheral behave as expected? CSU information is on the security reference manual, for access, please contact your distributor.
