STM32wb55 - SHUTDOWN MODE / STANDBY MODE wake up with SYSWKUP pin

[VJani.11]

Hi,

I am currently using stm32wb 55 and I want to achive the shutdown/standby mode with WKUP pin functionality, I tried Several ways but it seems its not working, also there is not any example for the same,Below code is for your reference ....

 BSP_LED_Init(LED2);

 BSP_LED_Init(LED3);

 SystemClock_Config();

 WkupPin1_Config();

 if (__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)

 {

  __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);

 }

 HAL_Delay(5000);

 BSP_LED_DeInit(LED2);

 BSP_LED_DeInit(LED3);

 /* Enable WakeUp Pin PWR_WAKEUP_PIN1 connected to PA0 */

 HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1_LOW);

 /* Clear all related wakeup flags*/

 __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUF1);

 /* Enter the Standby mode */

 HAL_PWR_EnterSTANDBYMode();

======================================

/* USER CODE BEGIN 4 */

static void WkupPin1_Config(void)

{

 /* Configure Button pin and unmask Wakeup with Interrupt request from line 0.*/

 BSP_PB_Init(BUTTON_SW1, BUTTON_MODE_EXTI);

 /* Enable wake-up pin pull-up state in Standby mode.*/

 HAL_PWREx_EnableGPIOPullUp(PWR_GPIO_A, PWR_GPIO_BIT_0);

 HAL_PWREx_EnablePullUpPullDownConfig();

}

[Remy ISSALYS]

Hello,

An example of WKUP pin functionality to wake up the system from standby will be available soon on STM32 Hotspot GitHub with a dedicated wiki page.

Maybe you can try with this code:

BSP_LED_Init(LED2);
BSP_LED_Init(LED3);
 
SystemClock_Config();
 
WkupPin1_Config();
 
if (__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
  __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
}
 
HAL_Delay(5000);
 
BSP_LED_DeInit(LED2);
BSP_LED_DeInit(LED3);
 
/* Disable all used wakeup sources */
HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN1_LOW);
 
/* Clear all wake up Flag */
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUF1);
 
/* Enable pull up on wakeup pin PA0 */
HAL_PWREx_EnableGPIOPullUp(PWR_GPIO_A, PWR_GPIO_BIT_0);
	
 /* Enable pull-up and pull-down configuration for CPU1 */
HAL_PWREx_EnablePullUpPullDownConfig();
 
/* Enable WakeUp Pin PWR_WAKEUP_PIN1 connected to PA0 */
HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1_LOW);
 
/* Clear all related wakeup flags*/
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUF1);
 
/* Enter the Standby mode */
HAL_PWR_EnterSTANDBYMode();
 
======================================
/* USER CODE BEGIN 4 */
static void WkupPin1_Config(void)
{
 /* Configure Button pin and unmask Wakeup with Interrupt request from line 0.*/
 BSP_PB_Init(BUTTON_SW1, BUTTON_MODE_EXTI);
 /* Enable wake-up pin pull-up state in Standby mode.*/
 HAL_PWREx_DisableGPIOPullUp(PWR_GPIO_A, PWR_GPIO_BIT_0);
 HAL_PWREx_EnablePullUpPullDownConfig();
}
 
 

Best Regards

[Remy ISSALYS]

Hello,

A new example is available on STM32 HotSpot Github STM32WB-BLE-standby which allow to wake up the system from standby from wake-up pin.

Best Regards

[VJani.11]

Hi Remy,

Thanks for the reply,

I have downloaded the project and loaded it as it is in P-Nucleo Board, It's advertising the ble, I am also able to discover and connect it through the ST Ble sensor app, furthormore its also able to connect and led blue is also operating as it is expected. When I disconnect the ble its going to Standby mode.....

Now.....

when I am trying to wake it up through the WKUP5 pin (PC5) by grounded it , its not able to wake-up the system.

one more obervation is LED2 is continously flickering when I upload BLE P2P Server Example (It's happning since past couple of days). Is there any anything wrong ???

Thanks in advance

[Piranha]

https://community.st.com/s/question/0D53W00001bnh8dSAA/how-to-enter-standby-or-shutdown-mode-on-stm32

[Remy ISSALYS · Accepted solution]

Hello,

Issue fixed in STM32WB-BLE-standby example available on STM32 HotSpot Github.

Best Regards

[Piranha]

The functions PWR_EnterOffMode(), PWR_EnterStopMode() and PWR_EnterSleepMode() still can have potential issues, which are described in my article, to which I gave a link in the other post.

A question about the PWR_ExitOffMode() function. As Standby/Shutdown modes cannot be exited without a reset, is this function implemented because the other CPU core or radio can block entering those modes?

[VBess.1]

This example will be of great help!

Nonetheless, opening the project in CubeIde it shows an ioc file that isn't in the repository...

[Remy ISSALYS]

Hello,

Indeed, the link to .ioc file will be remove, thanks for your feedback.

Best Regards