mirror of
https://github.com/STMicroelectronics/STM32CubeF4.git
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310 lines
9.8 KiB
C
310 lines
9.8 KiB
C
/**
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******************************************************************************
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* @file RTC/RTC_Calendar/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32F4xx RTC HAL API to configure
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* Time and Date.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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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 STM32F4xx_HAL_Examples
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* @{
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*/
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/** @addtogroup RTC_Calendar
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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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/* RTC handler declaration */
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RTC_HandleTypeDef RtcHandle;
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/* Buffers used for displaying Time and Date */
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uint8_t aShowTime[50] = {0};
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uint8_t aShowDate[50] = {0};
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/* Private function prototypes -----------------------------------------------*/
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static void SystemClock_Config(void);
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static void RTC_CalendarConfig(void);
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static void RTC_CalendarShow(uint8_t *showtime, uint8_t *showdate);
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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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/* STM32F4xx 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 100 MHz */
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SystemClock_Config();
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/* Configure LED1, LED2, LED3 and LED4 */
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BSP_LED_Init(LED1);
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BSP_LED_Init(LED2);
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BSP_LED_Init(LED3);
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BSP_LED_Init(LED4);
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/*##-1- Configure the RTC peripheral #######################################*/
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/* Configure RTC prescaler and RTC data registers */
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/* RTC configured as follows:
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- Hour Format = Format 24
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- Asynch Prediv = Value according to source clock
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- Synch Prediv = Value according to source clock
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- OutPut = Output Disable
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- OutPutPolarity = High Polarity
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- OutPutType = Open Drain */
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RtcHandle.Instance = RTC;
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RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
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RtcHandle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
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RtcHandle.Init.SynchPrediv = RTC_SYNCH_PREDIV;
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RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
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RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
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RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
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__HAL_RTC_RESET_HANDLE_STATE(&RtcHandle);
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if (HAL_RTC_Init(&RtcHandle) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/* Turn on LED1 */
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BSP_LED_On(LED1);
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/*##-2- Check if Data stored in BackUp register1: No Need to reconfigure RTC#*/
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/* Read the Back Up Register 1 Data */
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if (HAL_RTCEx_BKUPRead(&RtcHandle, RTC_BKP_DR1) != 0x32F2)
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{
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/* Configure RTC Calendar */
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RTC_CalendarConfig();
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}
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else
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{
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/* Check if the Power On Reset flag is set */
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if (__HAL_RCC_GET_FLAG(RCC_FLAG_PORRST) != RESET)
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{
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/* Turn on LED2: Power on reset occured */
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BSP_LED_On(LED2);
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}
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/* Check if Pin Reset flag is set */
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if (__HAL_RCC_GET_FLAG(RCC_FLAG_PINRST) != RESET)
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{
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/* Turn on LED4: External reset occured */
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BSP_LED_On(LED4);
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}
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/* Clear source Reset Flag */
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__HAL_RCC_CLEAR_RESET_FLAGS();
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}
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/* Infinite loop */
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while (1)
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{
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/*##-3- Display the updated Time and Date ################################*/
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RTC_CalendarShow(aShowTime, aShowDate);
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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 (HSE)
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* SYSCLK(Hz) = 100000000
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* HCLK(Hz) = 100000000
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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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* HSE Frequency(Hz) = 8000000
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* PLL_M = 8
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* PLL_N = 200
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* PLL_P = 2
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* PLL_Q = 7
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* PLL_R = 2
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* VDD(V) = 3.3
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* Main regulator output voltage = Scale1 mode
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* Flash Latency(WS) = 3
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* @param None
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* @retval None
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*/
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static void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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HAL_StatusTypeDef ret = HAL_OK;
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/* Enable Power Control clock */
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__HAL_RCC_PWR_CLK_ENABLE();
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/* The voltage scaling allows optimizing the power consumption when the device is
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clocked below the maximum system frequency, to update the voltage scaling value
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regarding system frequency refer to product datasheet. */
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/* Enable HSE Oscillator and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 8;
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RCC_OscInitStruct.PLL.PLLN = 200;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = 7;
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RCC_OscInitStruct.PLL.PLLR = 2;
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ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
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if(ret != HAL_OK)
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{
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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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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | 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_DIV2;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3);
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if(ret != HAL_OK)
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{
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while(1) { ; }
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}
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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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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/* Turn LED3 on */
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BSP_LED_On(LED3);
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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 Configure the current time and date.
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* @param None
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* @retval None
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*/
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static void RTC_CalendarConfig(void)
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{
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RTC_DateTypeDef sdatestructure;
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RTC_TimeTypeDef stimestructure;
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/*##-1- Configure the Date #################################################*/
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/* Set Date: Friday April 22th 2016 */
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sdatestructure.Year = 0x16;
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sdatestructure.Month = RTC_MONTH_APRIL;
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sdatestructure.Date = 0x22;
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sdatestructure.WeekDay = RTC_WEEKDAY_FRIDAY;
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if(HAL_RTC_SetDate(&RtcHandle,&sdatestructure,RTC_FORMAT_BCD) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/*##-2- Configure the Time #################################################*/
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/* Set Time: 02:18:00 */
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stimestructure.Hours = 0x02;
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stimestructure.Minutes = 0x18;
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stimestructure.Seconds = 0x00;
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stimestructure.TimeFormat = RTC_HOURFORMAT12_AM;
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stimestructure.DayLightSaving = RTC_DAYLIGHTSAVING_NONE ;
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stimestructure.StoreOperation = RTC_STOREOPERATION_RESET;
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if (HAL_RTC_SetTime(&RtcHandle, &stimestructure, RTC_FORMAT_BCD) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/*##-3- Writes a data in a RTC Backup data Register1 #######################*/
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HAL_RTCEx_BKUPWrite(&RtcHandle, RTC_BKP_DR1, 0x32F2);
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}
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/**
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* @brief Display the current time and date.
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* @param showtime : pointer to buffer
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* @param showdate : pointer to buffer
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* @retval None
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*/
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static void RTC_CalendarShow(uint8_t *showtime, uint8_t *showdate)
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{
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RTC_DateTypeDef sdatestructureget;
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RTC_TimeTypeDef stimestructureget;
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/* Get the RTC current Time */
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HAL_RTC_GetTime(&RtcHandle, &stimestructureget, RTC_FORMAT_BIN);
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/* Get the RTC current Date */
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HAL_RTC_GetDate(&RtcHandle, &sdatestructureget, RTC_FORMAT_BIN);
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/* Display time Format : hh:mm:ss */
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sprintf((char *)showtime, "%2d:%2d:%2d", stimestructureget.Hours, stimestructureget.Minutes, stimestructureget.Seconds);
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/* Display date Format : mm-dd-yy */
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sprintf((char *)showdate, "%2d-%2d-%2d", sdatestructureget.Month, sdatestructureget.Date, 2000 + sdatestructureget.Year);
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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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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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