HAL PWR typical use cases for migration

HAL PWR Enter Stop Mode with RTC Wakeup

HAL1 sequence diagram HAL2 sequence diagram

	HAL1	HAL2
Usage	// RTC handle RTC_HandleTypeDef hrtc; void SystemClock_Config(void) { // Reinitialize the system clock after waking up // (Implementation depends on your specific clock configuration) // Example: Re-enable HSE or HSI and configure PLL } int main(void) { // HAL initialization HAL_Init(); // Configure the system clock SystemClock_Config(); // Initialize RTC hrtc.Instance = RTC; HAL_RTC_Init(&hrtc); // Enable PWR clock __HAL_RCC_PWR_CLK_ENABLE(); // Configure Voltage Scaling (Scale 1 for low-power modes) HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1); // Configure the RTC as a wakeup source HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 0xFFFF, RTC_WAKEUPCLOCK_RTCCLK_DIV16 , 0); // Enter Stop Mode (Stop 0 with low-power regulator) HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI); // System resumes here after wakeup SystemClock_Config(); // Reconfigure the system clock while (1) { // Main loop } }	hal_rtc_wakeup_config_t config_wakeup; hal_rtc_time_t period_reload; hal_rtc_time_t period_autoclear; void SystemClock_Config(void) { // Reinitialize the system clock after waking up // (Implementation depends on your specific clock configuration) // Example: Re-enable HSE or HSI and configure PLL } int main(void) { // HAL initialization HAL_Init(); // Configure the system clock SystemClock_Config(); // Initialize RTC HAL_RTC_DisableWriteProtection() HAL_RTC_EnterInitMode() // Enable PWR clock HAL_RCC_PWR_EnableClock(); // Configure Voltage Scaling (Scale 1 for low-power modes) HAL_PWR_SetMainRegulatorVoltageScalingRange(HAL_PWR_VOLT_SCALE_1); // Configure the RTC as a wakeup source config_wakeup.clock = HAL_RTC_WAKEUP_TIMER_CLOCK_RTCCLK_DIV16; period_reload.sec = 1U; HAL_RTC_WAKEUP_SetConfig(&config_wakeup); HAL_RTC_WAKEUP_SetPeriod(&period_reload, &period_autoclear); HAL_RTC_WAKEUP_Start(HAL_RTC_WAKEUP_IT_ENABLE); // Enter Stop Mode (Stop 0 with low-power regulator) HAL_PWR_EnterSTOPMode(HAL_PWR_LOW_PWR_MODE_WFI, HAL_PWR_STOP0_MODE); // System resumes here after wakeup SystemClock_Config(); // Reconfigure the system clock while (1) { // Main loop } }

HAL PWR Enter Stop Mode with External Wakeup

HAL1 sequence diagram HAL2 sequence diagram

	HAL1	HAL2
Usage	// Define the GPIO pin for external wakeup (e.g., PA0) #define WAKEUP_PIN GPIO_PIN_0 #define WAKEUP_PORT GPIOA void SystemClock_Config(void); int main(void) { // Initialize the HAL Library HAL_Init(); // Configure the system clock SystemClock_Config(); // Enable the PWR clock __HAL_RCC_PWR_CLK_ENABLE(); // Configure Voltage Scaling (Scale 1 for low-power modes) HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1); // Initialize the GPIO pin for external wakeup GPIO_InitTypeDef GPIO_InitStruct = {0}; // Enable the GPIO clock for the wakeup pin __HAL_RCC_GPIOA_CLK_ENABLE(); // Configure the GPIO pin as an external interrupt GPIO_InitStruct.Pin = WAKEUP_PIN; GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING; // Trigger on falling edge GPIO_InitStruct.Pull = GPIO_NOPULL; // No pull-up or pull-down HAL_GPIO_Init(WAKEUP_PORT, &GPIO_InitStruct); // Enable and set the EXTI interrupt priority HAL_NVIC_SetPriority(EXTI0_IRQn, 0, 0); HAL_NVIC_EnableIRQ(EXTI0_IRQn); // Enter Stop Mode HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI); // System resumes here after wakeup SystemClock_Config(); // Reconfigure the system clock while (1) { // Main loop } } // EXTI interrupt handler for the wakeup pin void EXTI0_IRQHandler(void) { // Handle the interrupt HAL_GPIO_EXTI_IRQHandler(WAKEUP_PIN); } // Callback function for EXTI interrupt void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) { // Wakeup event occurred // Add any additional logic here if needed } void SystemClock_Config(void) { // Reinitialize the system clock after waking up // (Implementation depends on your specific clock configuration) // Example: Re-enable HSE or HSI and configure PLL }	// Define the GPIO pin for external wakeup (e.g., PA0) #define WAKEUP_PIN HAL_GPIO_PIN_0 #define WAKEUP_PORT GPIOA void SystemClock_Config(void); int main(void) { // Initialize the HAL Library HAL_Init(); // Configure the system clock SystemClock_Config(); // Enable the PWR clock HAL_RCC_PWR_EnableClock(); // Configure Voltage Scaling (Scale 1 for low-power modes) HAL_PWR_SetMainRegulatorVoltageScalingRange(HAL_PWR_VOLT_SCALE_1); // Initialize the GPIO pin for external wakeup hal_gpio_config_t GPIO_ConfigStructure; hal_exti_handle_t hexti; hal_exti_config_t EXTI_ConfigStructure; GPIO_ConfigStructure.mode = HAL_GPIO_MODE_INPUT; GPIO_ConfigStructure.pull = HAL_GPIO_PULL_NO; HAL_GPIO_Init(WAKEUP_PORT, WAKEUP_PIN, &GPIO_ConfigStructure); HAL_EXTI_Init(&hexti, HAL_EXTI_LINE_0); EXTI_ConfigStructure.trigger = HAL_EXTI_TRIGGER_FALLING; EXTI_ConfigStructure.gpio_port = HAL_EXTI_GPIOA; HAL_EXTI_SetConfig(&hexti, &EXTI_ConfigStructure); HAL_EXTI_Enable(&hexti, HAL_EXTI_MODE_INTERRUPT) HAL_NVIC_SetPriority(EXTI0_IRQn, 0, 0); HAL_NVIC_EnableIRQ(EXTI0_IRQn); // Enter Stop Mode HAL_PWR_EnterSTOPMode(HAL_PWR_LOW_PWR_MODE_WFI, HAL_PWR_STOP0_MODE); // System resumes here after wakeup SystemClock_Config(); // Reconfigure the system clock while (1) { // Main loop } } // EXTI interrupt handler for the wakeup pin void EXTI0_IRQHandler(void) { // Handle the interrupt HAL_EXTI_IRQHandler(&hexti); } // Callback function for EXTI interrupt void HAL_EXTI_TriggerCallback(uint16_t GPIO_Pin) { // Wakeup event occurred // Add any additional logic here if needed } void SystemClock_Config(void) { // Reinitialize the system clock after waking up // (Implementation depends on your specific clock configuration) // Example: Re-enable HSE or HSI and configure PLL }

Power Voltage Detector (PVD) with EXTI wakeup

HAL1 sequence diagram HAL2 sequence diagram

	HAL1	HAL2
Usage	#include "stm32u5xx_hal.h" // Function Prototypes void SystemClock_Config(void); // Main Function int main(void) { // Initialize the HAL Library HAL_Init(); // Configure the System Clock SystemClock_Config(); // Configure the Power Voltage Detector (PVD) PWR_PVDTypeDef sConfigPVD; // Enable the PWR Clock HAL_RCC_PWR_EnableClock(); // Configure the PVD Level and Mode sConfigPVD.PVDLevel = PWR_PVDLEVEL_3; // Set threshold (e.g., 2.5V) sConfigPVD.Mode = PWR_PVD_MODE_IT_RISING_FALLING; // Interrupt on both rising and falling edges // Initialize the PVD HAL_PWR_ConfigPVD(&sConfigPVD); // Enable the PVD Interrupt HAL_PWR_EnablePVD(); // Configure the EXTI Line for PVD HAL_NVIC_SetPriority(PVD_AVD_IRQn, 0, 0); // Set priority HAL_NVIC_EnableIRQ(PVD_AVD_IRQn); // Enable the interrupt // Enter Sleep Mode and wait for PVD interrupt HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI); // Main loop (should not reach here unless woken up) while (1) { // Add your application code here } } // PVD Interrupt Handler void HAL_PWR_PVDCallback(void) { // This callback is triggered when the PVD detects a voltage threshold crossing if (__HAL_PWR_GET_FLAG(PWR_FLAG_PVDO)) { // Voltage is below the threshold } else { // Voltage is above the threshold } } // System Clock Configuration (Example for STM32U5) void SystemClock_Config(void) { } // PVD IRQ Handler void PVD_AVD_IRQHandler(void) { HAL_PWR_PVD_IRQHandler(); }	#include "stm32u5xx_hal.h" // Function Prototypes void SystemClock_Config(void); // Main Function int main(void) { // Initialize the HAL Library HAL_Init(); // Configure the System Clock SystemClock_Config(); // Enable the PWR Clock HAL_RCC_PWR_EnableClock(); // Configure the PVD Level and Mode HAL_PWR_SetProgrammableVoltageDetectorLevel(HAL_PWR_PVD_LEVEL_3); // Initialize the PVD EXTI_ConfigStructure.trigger = HAL_EXTI_TRIGGER_RISING_FALLING; EXTI_ConfigStructure.gpio_port = HAL_EXTI_GPIOA; HAL_EXTI_SetConfig(&hexti, &EXTI_ConfigStructure); HAL_EXTI_Enable(&hexti, HAL_EXTI_MODE_INTERRUPT); // Enable the PVD Interrupt HAL_PWR_EnableProgrammableVoltageDetector(); // Configure the EXTI Line for PVD HAL_NVIC_SetPriority(PVD_AVD_IRQn, 0, 0); // Set priority HAL_NVIC_EnableIRQ(PVD_AVD_IRQn); // Enable the interrupt // Enter Sleep Mode and wait for PVD interrupt HAL_PWR_EnterSLEEPMode(HAL_PWR_LOW_PWR_MODE_WFI); // Main loop (should not reach here unless woken up) while (1) { // Add your application code here } } // PVD Interrupt Handler void HAL_EXTI_TriggerCallback(void) { // This callback is triggered when the PVD detects a voltage threshold crossing if (LL_PWR_IsActiveFlag_PVDO(LL_PWR_FLAG_PVDO)) { // Voltage is below the threshold } else { // Voltage is above the threshold } } // System Clock Configuration (Example for STM32U5) void SystemClock_Config(void) { } void EXTI0_IRQHandler(void) { HAL_EXTI_IRQHandler(&hexti); }

HAL PWR Enter Standby Mode with External Wakeup

HAL1 sequence diagram HAL2 sequence diagram

	HAL1	HAL2
Usage	// Function prototypes void SystemClock_Config(void); int main(void) { // HAL initialization HAL_Init(); SystemClock_Config(); // Initialize GPIO for EXTI GPIO_InitTypeDef GPIO_InitStruct = {0}; // Enable GPIOA clock __HAL_RCC_GPIOA_CLK_ENABLE(); // Configure PA0 as input with EXTI interrupt GPIO_InitStruct.Pin = GPIO_PIN_0; GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING; // Trigger on rising edge GPIO_InitStruct.Pull = GPIO_NOPULL; // No pull-up or pull-down HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); // Enable and set EXTI line 0 interrupt priority HAL_NVIC_SetPriority(EXTI0_IRQn, 0, 0); HAL_NVIC_EnableIRQ(EXTI0_IRQn); // Enter standby mode // Enable Power Control clock __HAL_RCC_PWR_CLK_ENABLE(); // Clear the Wakeup flag __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU); // Enable EXTI wakeup source HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1_HIGH); // Enter Standby mode HAL_PWR_EnterSTANDBYMode(); // Code should never reach here after entering standby mode while (1) { } } // System Clock Configuration (example for STM32U5) void SystemClock_Config(void) { // Reinitialize the system clock after waking up // (Implementation depends on your specific clock configuration) // Example: Re-enable HSE or HSI and configure PLL }	// Function prototypes void SystemClock_Config(void); int main(void) { // HAL initialization HAL_Init(); SystemClock_Config(); // Enable GPIOA clock HAL_RCC_GPIOA_CLK_ENABLE(); EXTI_ConfigStructure.trigger = HAL_EXTI_TRIGGER_RISING_FALLING; EXTI_ConfigStructure.gpio_port = HAL_EXTI_GPIOA; HAL_EXTI_SetConfig(&hexti, &EXTI_ConfigStructure); HAL_EXTI_Enable(&hexti, HAL_EXTI_MODE_INTERRUPT); // Enable and set EXTI line 0 interrupt priority HAL_NVIC_SetPriority(EXTI0_IRQn, 0, 0); HAL_NVIC_EnableIRQ(EXTI0_IRQn); // Enter standby mode // Enable Power Control clock HAL_RCC_PWR_EnableClock(); // Clear the Wakeup flag LL_PWR_ClearFlag_WU1(); // Enable EXTI wakeup source HAL_PWR_LP_SetConfigWakeupPin(HAL_PWR_WAKEUP_PIN_1, HAL_PWR_WAKEUP_PIN_POLARITY_HIGH) // Enter Standby mode HAL_PWR_EnterSTANDBYMode(); // Code should never reach here after entering standby mode while (1) { } } // System Clock Configuration (example for STM32U5) void SystemClock_Config(void) { // Reinitialize the system clock after waking up // (Implementation depends on your specific clock configuration) // Example: Re-enable HSE or HSI and configure PLL }