On 19/11/2020 09:51, Christian Mauderer wrote:
+  mpu = _ARMV7M_MPU;
+  scb = _ARMV7M_SCB;
+
+  scb->shcsr &= ~ARMV7M_SCB_SHCSR_MEMFAULTENA;
I think it is not necessary to touch the shcsr. Disabling the MPU should be enough.
+  mpu->ctrl = 0;
+
+  _ARM_Data_synchronization_barrier();
+  _ARM_Instruction_synchronization_barrier();

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