Disable sleep on STM32F4 as an workaround for stability issues.

teetak01 · teetak01 · commit c3ef3cac0944 · 2020-02-26T13:48:19.000+02:00
This workaround is related to Mbed OS issue #12294
diff --git a/targets/TARGET_STM/TARGET_STM32F4/device/stm32f4xx_hal_pwr.c b/targets/TARGET_STM/TARGET_STM32F4/device/stm32f4xx_hal_pwr.c
@@ -391,7 +391,7 @@ void HAL_PWR_EnterSLEEPMode(uint32_t Regulator, uint8_t SLEEPEntry)
   if(SLEEPEntry == PWR_SLEEPENTRY_WFI)
   {   
     /* Request Wait For Interrupt */
-    __WFI();
+    __NOP();
   }
   else
   {

Original file line number	Diff line number	Diff line change
`@@ -391,7 +391,7 @@ void HAL_PWR_EnterSLEEPMode(uint32_t Regulator, uint8_t SLEEPEntry)`
`391`	`391`	`if(SLEEPEntry == PWR_SLEEPENTRY_WFI)`
`392`	`392`	`{`
`393`	`393`	`/* Request Wait For Interrupt */`
`394`		`- __WFI();`
	`394`	`+ __NOP();`
`395`	`395`	`}`
`396`	`396`	`else`
`397`	`397`	`{`