Hi @AlexisL !
Thank you for reply.
The wakeup problem:
So if the RTC is secured, it use the WKUP6 instead of WKUP7. I get it.
The second :
No, we didn't clear the Pending IRQs. I will modify my code.
My standby part of code has an branch, because we decide which mode to use (stop or standy) depending on the battery SOC, so if the MCU can not go to standby or stop, we see it in the log:
Debug("================= ENTER SEEP/STANDBY for %d sec ==========================\n", sec);
// Clear WDT...
HAL_IWDG_Refresh(&hiwdg);
HAL_SuspendTick();
if (battery.soc < 70) {
HAL_PWR_EnterSTANDBYMode();
}
else {
HAL_PWREx_EnterSTOP2Mode(PWR_SLEEPENTRY_WFI);
}
HAL_IWDG_Refresh(&hiwdg);
// After sleep
HAL_Init();
SystemClock_Config();
HAL_ResumeTick();
Debug("================= WAKEUP! ==========================\n");
In the PWR->SR was nothing, all the bits are cleared, but In the RCC_CSR the PINRSTF and the OBLRSTF was set.
And now after an OTA routine, we seen same behavior.
/*************************************
* @brief Apply option bytes
*************************************/
static void prvOptionByteApply( void ){
HAL_IWDG_Refresh(&hiwdg);
Debug( "Option Byte Launch in progress.\n" );
( void ) HAL_FLASH_Unlock();
( void ) HAL_FLASH_OB_Unlock();
/* Generate System Reset to load the new option byte values ***************/
/* On successful option bytes loading the system should reset and control should not return from this function. */
( void ) HAL_FLASH_OB_Launch();
}
After the OB_Launch, the MCU was reseting, and run from the second bank. But after the STOP2, on wakeup time, the MCU was restarted, and the OBLRSTF was set. And repeated again after STOP2.
Only the full FLASH erase was solve that problem.
I use the OTA code from https://github.com/FreeRTOS/iot-reference-stm32u5/blob/main/Projects/b_u585i_iot02a_ntz/Src/ota_pal/ota_pal_stm32u5_ntz.c
The major difference, I need to clear all flash error flags before erase or program the FLASH, like this:
__HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_ALL_ERRORS);
if( HAL_FLASHEx_Erase( &pEraseInit, &pageError ) != HAL_OK )
{
getFlashError();
ERROR( "Failed to erase the flash bank, errorCode = %u, pageError = %u.\n", HAL_FLASH_GetError(), pageError );
xResult = false;
}
Otherwise we alwasy get a HAL_FLASH_ERROR_PGS error.
Best regards
Krisztian
