209 lines
6.4 KiB
C
209 lines
6.4 KiB
C
/**
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******************************************************************************
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* @file PWR/PWR_STANDBY/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32F1xx PWR HAL API to enter
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* and exit the standby mode with a wakeup pin or external reset.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F1xx_HAL_Examples
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* @{
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*/
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/** @addtogroup PWR_STANDBY
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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static __IO uint32_t TimingDelay;
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void SystemClock_Config(void);
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/* Private function prototypes -----------------------------------------------*/
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static void SystemPower_Config(void);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program
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* @param None
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* @retval None
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*/
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int main(void)
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{
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/* STM32F103xB HAL library initialization:
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- Configure the Flash prefetch
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- Systick timer is configured by default as source of time base, but user
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can eventually implement his proper time base source (a general purpose
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timer for example or other time source), keeping in mind that Time base
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duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
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handled in milliseconds basis.
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- Set NVIC Group Priority to 4
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- Low Level Initialization
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*/
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HAL_Init();
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/* Configure the system clock to 64 MHz */
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SystemClock_Config();
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/* Configure the system Power */
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SystemPower_Config();
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/* Check and handle if the system was resumed from Standby mode */
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if (__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
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{
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/* Clear Standby flag */
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__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
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}
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/* Insert 5 seconds delay */
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HAL_Delay(5000);
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/* The Following Wakeup sequence is highly recommended prior to each Standby mode entry
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mainly when using more than one wakeup source this is to not miss any wakeup event.
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- Disable all used wakeup sources,
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- Clear all related wakeup flags,
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- Re-enable all used wakeup sources,
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- Enter the Standby mode.
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*/
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/* Disable all used wakeup sources: PWR_WAKEUP_PIN1 */
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HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN1);
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/* Clear all related wakeup flags*/
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__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
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/* Enable WakeUp Pin PWR_WAKEUP_PIN1 connected to PA.00 */
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HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1);
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/* Enter the Standby mode */
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HAL_PWR_EnterSTANDBYMode();
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/* This code will never be reached! */
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while (1)
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{
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}
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSI)
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* SYSCLK(Hz) = 64000000
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* HCLK(Hz) = 64000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 2
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* APB2 Prescaler = 1
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* PLLMUL = 16
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* Flash Latency(WS) = 2
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* @param None
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef clkinitstruct = {0};
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RCC_OscInitTypeDef oscinitstruct = {0};
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/* Configure PLL ------------------------------------------------------*/
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/* PLL configuration: PLLCLK = (HSI / 2) * PLLMUL = (8 / 2) * 16 = 64 MHz */
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/* PREDIV1 configuration: PREDIV1CLK = PLLCLK / HSEPredivValue = 64 / 1 = 64 MHz */
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/* Enable HSI and activate PLL with HSi_DIV2 as source */
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oscinitstruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
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oscinitstruct.HSEState = RCC_HSE_OFF;
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oscinitstruct.LSEState = RCC_LSE_OFF;
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oscinitstruct.HSIState = RCC_HSI_ON;
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oscinitstruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
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oscinitstruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
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oscinitstruct.PLL.PLLState = RCC_PLL_ON;
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oscinitstruct.PLL.PLLSource = RCC_PLLSOURCE_HSI_DIV2;
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oscinitstruct.PLL.PLLMUL = RCC_PLL_MUL16;
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if (HAL_RCC_OscConfig(&oscinitstruct)!= HAL_OK)
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{
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/* Initialization Error */
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while(1);
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}
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
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clocks dividers */
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clkinitstruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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clkinitstruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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clkinitstruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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clkinitstruct.APB2CLKDivider = RCC_HCLK_DIV1;
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clkinitstruct.APB1CLKDivider = RCC_HCLK_DIV2;
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if (HAL_RCC_ClockConfig(&clkinitstruct, FLASH_LATENCY_2)!= HAL_OK)
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{
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/* Initialization Error */
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while(1);
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}
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}
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/**
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* @brief System Power Configuration
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* The system Power is configured as follow :
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* + VREFINT OFF, with fast wakeup enabled
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* + No IWDG
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* + Wakeup using PWR_WAKEUP_PIN1
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* @param None
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* @retval None
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*/
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static void SystemPower_Config(void)
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{
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/* Enable Power Control clock */
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__HAL_RCC_PWR_CLK_ENABLE();
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}
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/**
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* @brief SYSTICK callback
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* @param None
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* @retval None
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*/
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void HAL_SYSTICK_Callback(void)
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{
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HAL_IncTick();
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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