STM32F429 standby mode can only enter once, can not enter anymore

[wenbang zheng]

Dear ALL

I got an problem when i use STM32F429 standby mode.

In the first time enter the standby mode it woks fine. I use PA0-WAUP pin to exit the standby mode. But, i make another try to enter the standby mode, it immediate reset。It is seems it entered the mode ok, and immediate exit from the mode. I have no ideal about it.

Here is my code to enter the standby mode

 if(uxBits & BIT_0)

  {

   UART_PutStr(UART_1,"接收到BIT0被设置的消�?�\r\n");

   

   HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1);

     

   HAL_PWR_EnterSTANDBYMode();

}

BYW, i use FreeRtos, and i put the code in a Take with and EverntBit been set

[Tesla DeLorean]

{
 /* Enable Power Clock */
 __HAL_RCC_PWR_CLK_ENABLE();
 
 /* Disable all used wakeup sources: Pin1(PA.0) */
 HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN1);
 
 /* Clear all related wakeup flags */
 __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
 
 /* Re-enable all used wakeup sources: Pin1(PA.0) */
 HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1);
 
 /*## Enter Standby Mode ####################################################*/
 /* Request to enter STANDBY mode */
 HAL_PWR_EnterSTANDBYMode();
}

[wenbang zheng]

Hi Clive

​

Thanks for help. the code __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU); make the problom. very appreciate. : )

[wenbang zheng]

Hi Clive

​

Thanks for help. the code __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU); make the problom. very appreciate. : )

​