disable/reset the MPU leaving openblt

FOME-Tech · Feb 17, 2025 · 02440ff · 02440ff
1 parent 553e42f
commit 02440ff
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/firmware/bootloader/openblt_chibios/openblt_chibios.cpp b/firmware/bootloader/openblt_chibios/openblt_chibios.cpp
@@ -75,6 +75,15 @@ void CpuStartUserProgram(void)
 #endif
   /* reset the HAL */
   chSysDisable();
+
+  // Clear all MPU settings, as they may immediately cause a fault after the jump to firmware
+  mpuDisable();
+  for (int i = 0; i < 8; i++) {
+    mpuConfigureRegion(i, 0, 0);
+  }
+  __DSB();
+  __ISB();
+
   /* reset the timer */
   TimerReset();
   /* remap user program's vector table */