322 lines
9.2 KiB
C
322 lines
9.2 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file PWR/PWR_STANDBY_RTC/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32WLxx PWR HAL API to enter
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* and exit the Standby mode using RTC.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2020 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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/* USER CODE END Header */
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/* Private includes ----------------------------------------------------------*/
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/* USER CODE BEGIN Includes */
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/* USER CODE END Includes */
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/* Private typedef -----------------------------------------------------------*/
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/* USER CODE BEGIN PTD */
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/* USER CODE END PTD */
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/* Private define ------------------------------------------------------------*/
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/* USER CODE BEGIN PD */
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#define LED_TOGGLE_DELAY 100UL
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/* USER CODE END PD */
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/* Private macro -------------------------------------------------------------*/
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/* USER CODE BEGIN PM */
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/* USER CODE END PM */
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/* Private variables ---------------------------------------------------------*/
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RTC_HandleTypeDef hrtc;
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/* USER CODE BEGIN PV */
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static __IO uint32_t TimingDelay;
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/* USER CODE END PV */
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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static void MX_RTC_Init(void);
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/* USER CODE BEGIN PFP */
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/* USER CODE END PFP */
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/* Private user code ---------------------------------------------------------*/
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/* USER CODE BEGIN 0 */
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/* USER CODE END 0 */
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/**
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* @brief The application entry point.
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* @retval int
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*/
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int main(void)
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{
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/* USER CODE BEGIN 1 */
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/* STM32WLxx 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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/* USER CODE END 1 */
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/* MCU Configuration--------------------------------------------------------*/
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/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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HAL_Init();
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/* USER CODE BEGIN Init */
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/* USER CODE END Init */
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/* Configure the system clock */
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SystemClock_Config();
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/* USER CODE BEGIN SysInit */
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/* Configure LED2, LED3 */
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BSP_LED_Init(LED2);
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BSP_LED_Init(LED3);
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/* USER CODE END SysInit */
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/* Initialize all configured peripherals */
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/* USER CODE BEGIN 2 */
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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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MX_RTC_Init();
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}
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else
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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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/* Enable access to RTC domain for following wake-up source configuration */
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HAL_PWR_EnableBkUpAccess();
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__HAL_RCC_RTCAPB_CLK_ENABLE();
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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*/
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HAL_RTCEx_DeactivateWakeUpTimer(&hrtc);
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/* Clear all related wakeup flags */
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__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
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/* Re-enable wakeup source */
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/* ## Setting the Wake up time ############################################*/
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/* RTC Wakeup Interrupt Generation:
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the wake-up counter is set to its maximum value to yield the longest
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stand-by time to let the current reach its lowest operating point.
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The maximum value is 0xFFFF, corresponding to about 33 sec. when
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RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16
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Wakeup Time Base = (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSI))
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Wakeup Time = Wakeup Time Base * WakeUpCounter
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= (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSI)) * WakeUpCounter
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==> WakeUpCounter = Wakeup Time / Wakeup Time Base
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To configure the wake up timer to 33s the WakeUpCounter is set to 0xFFFF:
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Wakeup Time Base = 16 /(~32 kHz RC) = ~0.5 ms
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Wakeup Time = 0.5 ms * WakeUpCounter
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Therefore, with wake-up counter = 0xFFFF = 65,535
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Wakeup Time = 0.5 ms * 65,535 = ~ 33 sec. */
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HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 0xFFFF, RTC_WAKEUPCLOCK_RTCCLK_DIV16, 0);
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/* Enter the Standby mode */
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HAL_PWR_EnterSTANDBYMode();
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/* Program should never reach this point (program restart when exiting from standby mode) */
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Error_Handler();
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/* USER CODE END 2 */
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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while (1)
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{
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/* USER CODE END WHILE */
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/* USER CODE BEGIN 3 */
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}
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/* USER CODE END 3 */
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}
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/**
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* @brief System Clock Configuration
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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_OscInitTypeDef RCC_OscInitStruct = {0};
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RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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/** Configure the main internal regulator output voltage
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*/
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/** Initializes the CPU, AHB and APB buses clocks
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_MSI;
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RCC_OscInitStruct.MSIState = RCC_MSI_ON;
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RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
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RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_8;
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RCC_OscInitStruct.LSIDiv = RCC_LSI_DIV1;
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RCC_OscInitStruct.LSIState = RCC_LSI_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
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RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV4;
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RCC_OscInitStruct.PLL.PLLN = 24;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|RCC_CLOCKTYPE_HCLK
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|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
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|RCC_CLOCKTYPE_PCLK2;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
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{
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Error_Handler();
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}
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}
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/**
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* @brief RTC Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_RTC_Init(void)
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{
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/* USER CODE BEGIN RTC_Init 0 */
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/* USER CODE END RTC_Init 0 */
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/* USER CODE BEGIN RTC_Init 1 */
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/* USER CODE END RTC_Init 1 */
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/** Initialize RTC Only
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*/
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hrtc.Instance = RTC;
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hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
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hrtc.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
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hrtc.Init.SynchPrediv = RTC_SYNCH_PREDIV;
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hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
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hrtc.Init.OutPutRemap = RTC_OUTPUT_REMAP_NONE;
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hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
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hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
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hrtc.Init.OutPutPullUp = RTC_OUTPUT_PULLUP_NONE;
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hrtc.Init.BinMode = RTC_BINARY_NONE;
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if (HAL_RTC_Init(&hrtc) != HAL_OK)
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{
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Error_Handler();
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}
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/* USER CODE BEGIN RTC_Init 2 */
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/* USER CODE END RTC_Init 2 */
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}
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/* USER CODE BEGIN 4 */
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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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if (TimingDelay != 0)
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{
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TimingDelay--;
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}
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else
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{
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/* Toggle LED2 */
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BSP_LED_Toggle(LED2);
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TimingDelay = LED_TOGGLE_DELAY;
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}
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}
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/* USER CODE END 4 */
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/**
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* @brief This function is executed in case of error occurrence.
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* @retval None
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*/
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void Error_Handler(void)
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{
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/* USER CODE BEGIN Error_Handler_Debug */
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/* Turn on the LED3 */
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BSP_LED_On(LED3);
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/* User can add his own implementation to report the HAL error return state */
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while(1)
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{
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}
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/* USER CODE END Error_Handler_Debug */
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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 CODE BEGIN 6 */
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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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/* USER CODE END 6 */
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}
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#endif /* USE_FULL_ASSERT */
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