StackRduino
diff --git a/‎stmhal/system_stm32.c‎
Lines changed: 8 additions & 0 deletions b/‎stmhal/system_stm32.c‎
Lines changed: 8 additions & 0 deletions
@@ -307,4 +307,12 @@ void SystemClock_Config(void)
   {
     __fatal_error("HAL_RCC_ClockConfig");
   }
+
+#if defined(STM32F7)
+  // The DFU bootloader changes the clocksource register from its default power
+  // on reset value, so we set it back here, so the clocksources are the same
+  // whether we were started from DFU or from a power on reset.
+
+  RCC->DCKCFGR2 = 0;
+#endif
 }
Original file line number	Diff line number	Diff line change
`@@ -307,4 +307,12 @@ void SystemClock_Config(void)`
`307`	`307`	`{`
`308`	`308`	`__fatal_error("HAL_RCC_ClockConfig");`
`309`	`309`	`}`
	`310`	`+`
	`311`	`+#if defined(STM32F7)`
	`312`	`+ // The DFU bootloader changes the clocksource register from its default power`
	`313`	`+ // on reset value, so we set it back here, so the clocksources are the same`
	`314`	`+ // whether we were started from DFU or from a power on reset.`
	`315`	`+`
	`316`	`+ RCC->DCKCFGR2 = 0;`
	`317`	`+#endif`
`310`	`318`	`}`