Stm32l011 refuses to go into stop mode

[fanfan6966]

Hello everyone,

I have a problem with my STM32L011G4U6, I want to put it in stop mode or in standby mode, but the two modes are not taken into account, only the sleep mode works, I must surely make a mistake but where? here is my function:

	void Enter_MCU_Sleep(void) {
	
        HAL_Delay(1000);
		HAL_UART_Transmit(&huart2, (uint8_t *)"Dort\r\n", 33, 300);

	    // Configurer et lancer le timer
	    __HAL_TIM_SET_COUNTER(&htim2, 0);
	    HAL_TIM_Base_Start_IT(&htim2); // Timer doit générer une IT de réveil

	    // Désactiver les périphériques pour réduire la consommation
	    //HAL_ADC_DeInit(&hadc);
	    HAL_UART_DeInit(&hlpuart1);
	    HAL_UART_DeInit(&huart2);
	    //__HAL_RCC_ADC1_CLK_DISABLE();
	    __HAL_RCC_LPUART1_CLK_DISABLE();
	    HAL_NVIC_DisableIRQ(EXTI4_15_IRQn);
	    HAL_NVIC_DisableIRQ(DMA1_Channel2_3_IRQn);
	    HAL_NVIC_DisableIRQ(DMA1_Channel4_5_IRQn);

	    // Désactiver le RTC et l'oscillateur LSE
	    HAL_RTCEx_DeactivateWakeUpTimer(&hrtc); // Désactiver le wakeup timer
	    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
	    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
	    RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
	    HAL_RCC_OscConfig(&RCC_OscInitStruct);
	    __HAL_RCC_RTC_DISABLE(); // Désactiver l'horloge RTC

	    //__HAL_RCC_USART2_CLK_DISABLE();
	    __HAL_TIM_CLEAR_FLAG(&htim2, TIM_FLAG_UPDATE);
	    __HAL_TIM_CLEAR_IT(&htim2, TIM_IT_UPDATE);
	    // Entrer en STOP mode


	    HAL_SuspendTick();

	    //HAL_PWR_EnterSLEEPMode(PWR_LOWPOWERREGULATOR_ON, PWR_SLEEPENTRY_WFI); // ou STOP
	   HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
	   //HAL_PWR_EnterSTOPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
	    //HAL_PWR_EnterSTANDBYMode();

	    HAL_TIM_Base_Stop_IT(&htim2); // Stopper le timer


	    HAL_ResumeTick();

	    // ⚡️ Après STOP
	    SystemClock_Config();   // Rétablir les clocks


	    HAL_NVIC_EnableIRQ(EXTI4_15_IRQn);
	    HAL_NVIC_EnableIRQ(DMA1_Channel2_3_IRQn);
	    HAL_NVIC_EnableIRQ(DMA1_Channel4_5_IRQn);
	    // Réinitialiser les périphériques
	    MX_GPIO_Init();
	   // MX_ADC_Init();
	    MX_LPUART1_UART_Init();
	   // MX_USART2_UART_Init();

	    HAL_Delay(3000); // Stabilisation modem
	    HAL_UART_Transmit(&huart2, (uint8_t *)"Réveil\r\n", 23, 300);
	    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);  // PA5 à l'état bas
	    HAL_Delay(2000);                                        // Attendre 1 seconde
	    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET);    // PA5 à l'état haut
	    //gps_and_battery_task();
	    //gestion_sms_etat();
	    //boucle1();
	    //check_moduleori_ready();
	    HAL_Delay(1000);



}

[Andrew Neil]

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@fanfan6966 wrote:

buy a ready-made board from the manufacturer?? What will that do for me?

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As explained, it will give you a known-good starting point.

It reduces the number of unknowns - which is always good when when trying to solve a problem.

It will also give a well-known platform - which makes it much easier for complete strangers to help you remotely.

As it stands, you haven't given any details of your custom board at all - so we have no idea what you're running on.

Also, we haven't see the complete code.

How to write your question to maximize your chances to find a solution

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@fanfan6966 wrote:

If the solution is to buy a ready-made product, then we must stop all DIY initiatives, and consume like sheep.

---

No, that is not the solution.

Nobody suggested that it would be the solution.

It is just a well tried & tested approach to help identify the problem.

Especially when you are new to the platform.

[fanfan6966]

Hello, after testing several examples from the GitHub repository, it's the same; it seems something is preventing the module from sleeping. I added a small display function, and it wakes up in a loop:

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