RTC_Calendar
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Outline
Includes
#include "main.h"
Private variables
RtcHandle
aShowTime
aShowDate
Private function prototypes
main()
SystemClock_Config()
Error_Handler()
RTC_CalendarConfig()
RTC_CalendarShow(uint8_t *, uint8_t *)
Files
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SourceVuSTM32 Libraries and SamplesRTC_CalendarSrc/main.c
 
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/** ****************************************************************************** * @file RTC/RTC_Calendar/Src/main.c * @author MCD Application Team * @brief This sample code shows how to use STM32F4xx RTC HAL API to configure * Time and Date. ****************************************************************************** * @attention * * Copyright (c) 2017 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. * ****************************************************************************** *//* ... */ /* Includes ------------------------------------------------------------------*/ #include "main.h" /** @addtogroup STM32F4xx_HAL_Examples * @{ *//* ... */ /** @addtogroup RTC_Calendar * @{ *//* ... */ Includes /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* RTC handler declaration */ RTC_HandleTypeDef RtcHandle; /* Buffers used for displaying Time and Date */ uint8_t aShowTime[50] = {0}; uint8_t aShowDate[50] = {0}; Private variables /* Private function prototypes -----------------------------------------------*/ static void SystemClock_Config(void); static void RTC_CalendarConfig(void); static void RTC_CalendarShow(uint8_t* showtime, uint8_t* showdate); Private function prototypes /* Private functions ---------------------------------------------------------*/ /** * @brief Main program * @param None * @retval None *//* ... */ int main(void) { /* STM32F4xx HAL library initialization: - Configure the Flash prefetch, instruction and Data caches - Configure the Systick to generate an interrupt each 1 msec - Set NVIC Group Priority to 4 - Global MSP (MCU Support Package) initialization *//* ... */ HAL_Init(); /* Configure LED1, LED2, LED3 and LED4 */ BSP_LED_Init(LED1); BSP_LED_Init(LED2); BSP_LED_Init(LED3); BSP_LED_Init(LED4); /* Configure the system clock to 180 MHz */ SystemClock_Config(); /*##-1- Configure the RTC peripheral #######################################*/ RtcHandle.Instance = RTC; /* Configure RTC prescaler and RTC data registers */ /* RTC configured as follow: - Hour Format = Format 24 - Asynch Prediv = Value according to source clock - Synch Prediv = Value according to source clock - OutPut = Output Disable - OutPutPolarity = High Polarity - OutPutType = Open Drain *//* ... */ RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24; RtcHandle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV; RtcHandle.Init.SynchPrediv = RTC_SYNCH_PREDIV; RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE; RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH; RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN; __HAL_RTC_RESET_HANDLE_STATE(&RtcHandle); if(HAL_RTC_Init(&RtcHandle) != HAL_OK) { /* Initialization Error */ Error_Handler(); }if (HAL_RTC_Init(&RtcHandle) != HAL_OK) { ... } /*##-2- Check if Data stored in BackUp register0: No Need to reconfigure RTC#*/ /* Read the BackUp Register 0 Data */ if(HAL_RTCEx_BKUPRead(&RtcHandle, RTC_BKP_DR0) != 0x32F2) { /* Configure RTC Calendar */ RTC_CalendarConfig(); }if (HAL_RTCEx_BKUPRead(&RtcHandle, RTC_BKP_DR0) != 0x32F2) { ... } else { /* Check if the Power On Reset flag is set */ if(__HAL_RCC_GET_FLAG(RCC_FLAG_PORRST) != RESET) { /* Power on reset occurred: Turn LED2 on */ BSP_LED_On(LED2); }if (__HAL_RCC_GET_FLAG(RCC_FLAG_PORRST) != RESET) { ... } /* Check if Pin Reset flag is set */ if(__HAL_RCC_GET_FLAG(RCC_FLAG_PINRST) != RESET) { /* External reset occurred: Turn LED4 on */ BSP_LED_On(LED4); }if (__HAL_RCC_GET_FLAG(RCC_FLAG_PINRST) != RESET) { ... } /* Clear Reset Flag */ __HAL_RCC_CLEAR_RESET_FLAGS(); }else { ... } /* Infinite loop */ while (1) { /*##-3- Display the updated Time and Date ################################*/ RTC_CalendarShow(aShowTime, aShowDate); }while (1) { ... } }{ ... } /** * @brief System Clock Configuration * The system Clock is configured as follow : * System Clock source = PLL (HSE) * SYSCLK(Hz) = 180000000 * HCLK(Hz) = 180000000 * AHB Prescaler = 1 * APB1 Prescaler = 4 * APB2 Prescaler = 2 * HSE Frequency(Hz) = 25000000 * PLL_M = 25 * PLL_N = 360 * PLL_P = 2 * PLL_Q = 7 * VDD(V) = 3.3 * Main regulator output voltage = Scale1 mode * Flash Latency(WS) = 5 * @param None * @retval None *//* ... */ static void SystemClock_Config(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_OscInitTypeDef RCC_OscInitStruct; /* Enable Power Control clock */ __HAL_RCC_PWR_CLK_ENABLE(); /* The voltage scaling allows optimizing the power consumption when the device is clocked below the maximum system frequency, to update the voltage scaling value regarding system frequency refer to product datasheet. *//* ... */ __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); /* Enable HSE Oscillator and activate PLL with HSE as source */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 25; RCC_OscInitStruct.PLL.PLLN = 360; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 7; if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { Error_Handler(); }if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { ... } /* Activate the Over Drive feature (available only for STM32F42xxx/43xxx devices)*/ if(HAL_PWREx_EnableOverDrive() != HAL_OK) { /* Initialization Error */ Error_Handler(); }if (HAL_PWREx_EnableOverDrive() != HAL_OK) { ... } /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers *//* ... */ RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { Error_Handler(); }if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { ... } }{ ... } /** * @brief This function is executed in case of error occurrence. * @param None * @retval None *//* ... */ void Error_Handler(void) { /* Turn LED3 on */ BSP_LED_On(LED3); while(1) { }while (1) { ... } }{ ... } /** * @brief Configure the current time and date. * @param None * @retval None *//* ... */ static void RTC_CalendarConfig(void) { RTC_DateTypeDef sdatestructure; RTC_TimeTypeDef stimestructure; /*##-1- Configure the Date #################################################*/ /* Set Date: Tuesday February 18th 2014 */ sdatestructure.Year = 0x14; sdatestructure.Month = RTC_MONTH_FEBRUARY; sdatestructure.Date = 0x18; sdatestructure.WeekDay = RTC_WEEKDAY_TUESDAY; if(HAL_RTC_SetDate(&RtcHandle,&sdatestructure,RTC_FORMAT_BCD) != HAL_OK) { /* Initialization Error */ Error_Handler(); }if (HAL_RTC_SetDate(&RtcHandle,&sdatestructure,RTC_FORMAT_BCD) != HAL_OK) { ... } /*##-2- Configure the Time #################################################*/ /* Set Time: 02:00:00 */ stimestructure.Hours = 0x02; stimestructure.Minutes = 0x00; stimestructure.Seconds = 0x00; stimestructure.TimeFormat = RTC_HOURFORMAT12_AM; stimestructure.DayLightSaving = RTC_DAYLIGHTSAVING_NONE; stimestructure.StoreOperation = RTC_STOREOPERATION_RESET; if(HAL_RTC_SetTime(&RtcHandle,&stimestructure,RTC_FORMAT_BCD) != HAL_OK) { /* Initialization Error */ Error_Handler(); }if (HAL_RTC_SetTime(&RtcHandle,&stimestructure,RTC_FORMAT_BCD) != HAL_OK) { ... } /*##-3- Writes a data in a RTC Backup data Register0 #######################*/ HAL_RTCEx_BKUPWrite(&RtcHandle,RTC_BKP_DR0,0x32F2); }{ ... } /** * @brief Display the current time and date. * @param showtime : pointer to buffer * @param showdate : pointer to buffer * @retval None *//* ... */ static void RTC_CalendarShow(uint8_t* showtime, uint8_t* showdate) { RTC_DateTypeDef sdatestructureget; RTC_TimeTypeDef stimestructureget; /* Get the RTC current Time */ HAL_RTC_GetTime(&RtcHandle, &stimestructureget, RTC_FORMAT_BIN); /* Get the RTC current Date */ HAL_RTC_GetDate(&RtcHandle, &sdatestructureget, RTC_FORMAT_BIN); /* Display time Format : hh:mm:ss */ sprintf((char*)showtime,"%02d:%02d:%02d",stimestructureget.Hours, stimestructureget.Minutes, stimestructureget.Seconds); /* Display date Format : mm-dd-yy */ sprintf((char*)showdate,"%02d-%02d-%02d",sdatestructureget.Month, sdatestructureget.Date, 2000 + sdatestructureget.Year); }{ ... } #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 can add his own implementation to report the file name and line number, ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) *//* ... */ /* Infinite loop */ while (1) { }while (1) { ... } }assert_failed (uint8_t* file, uint32_t line) { ... } /* ... */#endif /** * @} *//* ... */ /** * @} *//* ... */
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