mirror of
https://github.com/STMicroelectronics/STM32CubeF0.git
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270 lines
8.2 KiB
C
270 lines
8.2 KiB
C
/**
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******************************************************************************
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* @file RTC/RTC_Tamper/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32F0xx RTC HAL API to write/read
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* data to/from RTC Backup data registers and demonstrates the Tamper
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* detection feature.
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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 STM32F0xx_HAL_Examples
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* @{
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*/
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/** @addtogroup RTC_Tamper
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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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__IO FlagStatus TamperStatus;
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/* Backup registers table */
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uint32_t aBKPDataReg[BACKUP_COUNT] =
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{
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RTC_BKP_DR0, RTC_BKP_DR1, RTC_BKP_DR2,
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RTC_BKP_DR3, RTC_BKP_DR4
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};
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/* Private function prototypes -----------------------------------------------*/
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static void SystemClock_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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uint32_t index = 0;
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RTC_TamperTypeDef stamperstructure;
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/* STM32F0xx 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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- Low Level Initialization
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*/
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HAL_Init();
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/* Configure LED2 */
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BSP_LED_Init(LED2);
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/* Configure User push-button button */
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BSP_PB_Init(BUTTON_USER, BUTTON_MODE_GPIO);
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/* Configure the system clock to 48 MHz */
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SystemClock_Config();
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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.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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RtcHandle.Instance = RTC;
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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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/*##-2- Configure RTC Tamper ###############################################*/
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stamperstructure.Tamper = RTC_TAMPER_1;
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stamperstructure.Trigger = RTC_TAMPERTRIGGER_FALLINGEDGE;
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stamperstructure.Filter = RTC_TAMPERFILTER_DISABLE;
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stamperstructure.SamplingFrequency = RTC_TAMPERSAMPLINGFREQ_RTCCLK_DIV32768;
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stamperstructure.PrechargeDuration = RTC_TAMPERPRECHARGEDURATION_1RTCCLK;
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stamperstructure.TamperPullUp = RTC_TAMPER_PULLUP_ENABLE;
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stamperstructure.TimeStampOnTamperDetection = RTC_TIMESTAMPONTAMPERDETECTION_DISABLE;
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if (HAL_RTCEx_SetTamper_IT(&RtcHandle, &stamperstructure) != 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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/* Clear the Tamper interrupt pending bit */
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__HAL_RTC_TAMPER_CLEAR_FLAG(&RtcHandle,RTC_FLAG_TAMP1F);
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/*##-3- Write Data on the Back Up registers ################################*/
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for (index = 0; index < BACKUP_COUNT; index++)
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{
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HAL_RTCEx_BKUPWrite(&RtcHandle, aBKPDataReg[index], 0xDF59 + (index * 0x5A));
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}
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/*##-4- Check Data is stored on the Back Up registers ######################*/
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for (index = 0; index < BACKUP_COUNT; index++)
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{
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if (HAL_RTCEx_BKUPRead(&RtcHandle, aBKPDataReg[index]) != (0xDF59 + (index * 0x5A)))
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{
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Error_Handler();
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}
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}
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/* Reset flag after writing of backup register in order to wait for new button press */
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TamperStatus = RESET;
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/*##-5- Wait for the tamper button is pressed ##############################*/
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while (TamperStatus != SET)
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{
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/* Toggle LED2 with a period of 1s */
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BSP_LED_Toggle(LED2);
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/* Delay */
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HAL_Delay(1000);
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}
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/*##-6- Deactivate the tamper ##############################*/
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HAL_RTCEx_DeactivateTamper(&RtcHandle, RTC_TAMPER_1);
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/*##-7- Check Data is cleared on the Back Up registers #####################*/
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for (index = 0; index < BACKUP_COUNT; index++)
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{
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if (HAL_RTCEx_BKUPRead(&RtcHandle, aBKPDataReg[index]) != 0x00)
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{
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Error_Handler();
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}
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}
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/* Infinite loop */
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while (1)
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{
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/* Turn LED2 on */
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BSP_LED_Toggle(LED2);
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/* Delay */
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HAL_Delay(100);
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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 (HSI48)
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* SYSCLK(Hz) = 48000000
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* HCLK(Hz) = 48000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 1
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* HSI Frequency(Hz) = 48000000
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* PREDIV = 2
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* PLLMUL = 2
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* Flash Latency(WS) = 1
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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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/* Select HSI48 Oscillator as PLL source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
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RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI48;
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RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV2;
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RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL2;
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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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/* Select PLL as system clock source and configure the HCLK and PCLK1 clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1);
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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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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1)!= 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 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 LED2 on */
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BSP_LED_On(LED2);
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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 Tamper event callback function
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* @param RTC handle
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* @retval None
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*/
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void HAL_RTCEx_Tamper1EventCallback(RTC_HandleTypeDef *hrtc)
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{
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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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