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STM32CubeWL/Projects/NUCLEO-WL55JC/Examples_LL/PWR/PWR_EnterStopMode/Src/main.c

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/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file Examples_LL/PWR/PWR_EnterStopMode/Src/main.c
* @author MCD Application Team
* @brief This example describes how to enter and exit the Stop 2 mode
* through the STM32WLxx PWR LL API.
******************************************************************************
* @attention
*
* Copyright (c) 2020 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
/* USER CODE BEGIN PFP */
void Configure_PWR(void);
void LED_Off(void);
void LED_Blinking_5s(void);
void EnterStop2Mode(void);
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
/* System interrupt init*/
NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
/* USER CODE BEGIN 2 */
/* Configure Power IP */
Configure_PWR();
/* Led blinking during 5s in RUN mode */
LED_Blinking_5s();
/* Switch OFF LED2 */
LED_Off();
/* Enter Stop 2 mode */
EnterStop2Mode();
/* Here Device is in Stop 2 mode */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
LL_FLASH_SetLatency(LL_FLASH_LATENCY_0);
while(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_0)
{
}
LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE2);
LL_RCC_HSI_Enable();
/* Wait till HSI is ready */
while(LL_RCC_HSI_IsReady() != 1)
{
}
LL_RCC_HSI_SetCalibTrimming(64);
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_HSI);
/* Wait till System clock is ready */
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSI)
{
}
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetAHB3Prescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
LL_Init1msTick(16000000);
/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
LL_SetSystemCoreClock(16000000);
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOB);
/**/
LL_GPIO_ResetOutputPin(LED2_GPIO_Port, LED2_Pin);
/**/
GPIO_InitStruct.Pin = LED2_Pin;
GPIO_InitStruct.Mode = LL_GPIO_MODE_OUTPUT;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
LL_GPIO_Init(LED2_GPIO_Port, &GPIO_InitStruct);
}
/* USER CODE BEGIN 4 */
/**
* @brief Turn-off LED2.
* @param None
* @retval None
*/
void LED_Off(void)
{
/* Turn LED2 off */
LL_GPIO_ResetOutputPin(LED2_GPIO_Port, LED2_Pin);
}
/**
* @brief Set LED2 to Blinking mode during 5s.
* @param None
* @retval None
*/
void LED_Blinking_5s(void)
{
uint32_t i = 0;
/* Toggle IO in during 5s (25*200ms) */
for(i = 0; i < 25; i++)
{
LL_GPIO_TogglePin(LED2_GPIO_Port, LED2_Pin);
LL_mDelay(200);
}
}
/**
* @brief Function to configure and initialize PWR IP.
* @param None
* @retval None
*/
void Configure_PWR(void)
{
/* Ensure that MSI is wake-up system clock */
LL_RCC_SetClkAfterWakeFromStop(LL_RCC_STOP_WAKEUPCLOCK_MSI);
}
/**
* @brief Function to configure and enter in Stop 2 Mode.
* @param None
* @retval None
*/
void EnterStop2Mode(void)
{
LL_GPIO_InitTypeDef gpio_initstruct = {LL_GPIO_PIN_ALL, LL_GPIO_MODE_ANALOG,
LL_GPIO_SPEED_FREQ_HIGH, LL_GPIO_OUTPUT_PUSHPULL,
LL_GPIO_PULL_NO, LL_GPIO_AF_0};
/* Set all GPIO in analog state to reduce power consumption, */
/* Note: Debug using ST-Link is not possible during the execution of this */
/* example because communication between ST-link and the device */
/* under test is done through UART. All GPIO pins are disabled (set */
/* to analog input mode) including UART I/O pins. */
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA |
LL_AHB2_GRP1_PERIPH_GPIOB |
LL_AHB2_GRP1_PERIPH_GPIOC |
LL_AHB2_GRP1_PERIPH_GPIOH);
LL_GPIO_Init(GPIOA, &gpio_initstruct);
LL_GPIO_Init(GPIOB, &gpio_initstruct);
LL_GPIO_Init(GPIOC, &gpio_initstruct);
LL_GPIO_Init(GPIOH, &gpio_initstruct);
LL_AHB2_GRP1_DisableClock(LL_AHB2_GRP1_PERIPH_GPIOA |
LL_AHB2_GRP1_PERIPH_GPIOB |
LL_AHB2_GRP1_PERIPH_GPIOC |
LL_AHB2_GRP1_PERIPH_GPIOH);
/** Request to enter Stop 2 mode
* Following procedure describe in STM32WLxx Reference Manual
* See PWR part, section Low-power modes, Stop 2 mode
*/
/* Set Stop 2 mode when CPU enters deepsleep */
LL_PWR_SetPowerMode(LL_PWR_MODE_STOP2);
/* Set SLEEPDEEP bit of Cortex System Control Register */
LL_LPM_EnableDeepSleep();
/* Request Wait For Interrupt */
__WFI();
}
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d", file, line) */
/* Infinite loop */
while (1)
{
}
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
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