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/**
******************************************************************************
* @file RTC/RTC_Tamper/Src/main.c
* @author MCD Application Team
* @brief This sample code shows how to use STM32F4xx RTC HAL API to write/read
* data to/from RTC Backup data registers and demonstrates the Tamper
* detection feature.
******************************************************************************
* @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_Tamper
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* RTC handler declaration */
RTC_HandleTypeDef RtcHandle;
__IO FlagStatus TamperStatus;
/* Backup registers table */
uint32_t aBKPDataReg[BACKUP_COUNT] =
{
RTC_BKP_DR0, RTC_BKP_DR1, RTC_BKP_DR2,
RTC_BKP_DR3, RTC_BKP_DR4, RTC_BKP_DR5,
RTC_BKP_DR6, RTC_BKP_DR7, RTC_BKP_DR8,
RTC_BKP_DR9, RTC_BKP_DR10, RTC_BKP_DR11,
RTC_BKP_DR12, RTC_BKP_DR13, RTC_BKP_DR14,
RTC_BKP_DR15, RTC_BKP_DR16, RTC_BKP_DR17,
RTC_BKP_DR18, RTC_BKP_DR19
};
/* Private function prototypes -----------------------------------------------*/
static void SystemClock_Config(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
uint32_t index = 0;
RTC_TamperTypeDef stamperstructure;
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock to 100 MHz */
SystemClock_Config();
/* Configure LED1, LED1, LED2 and LED1 */
BSP_LED_Init(LED1);
BSP_LED_Init(LED1);
BSP_LED_Init(LED2);
BSP_LED_Init(LED1);
/* Configure User push-button button */
BSP_PB_Init(BUTTON_USER,BUTTON_MODE_GPIO);
/*##-1- Configure the RTC peripheral #######################################*/
/* Configure RTC prescaler and RTC data registers */
/* RTC configured as follows:
- 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.Instance = RTC;
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();
}
/*##-2- Configure RTC Tamper ###############################################*/
stamperstructure.Tamper = RTC_TAMPER_1;
/* Use PC13 as Tamper 1 with interrupt mode */
stamperstructure.PinSelection = RTC_TAMPERPIN_PC13;
stamperstructure.Trigger = RTC_TAMPERTRIGGER_FALLINGEDGE;
stamperstructure.Filter = RTC_TAMPERFILTER_DISABLE;
stamperstructure.SamplingFrequency = RTC_TAMPERSAMPLINGFREQ_RTCCLK_DIV32768;
stamperstructure.PrechargeDuration = RTC_TAMPERPRECHARGEDURATION_1RTCCLK;
stamperstructure.TamperPullUp = RTC_TAMPER_PULLUP_ENABLE;
stamperstructure.TimeStampOnTamperDetection = RTC_TIMESTAMPONTAMPERDETECTION_DISABLE;
if (HAL_RTCEx_SetTamper_IT(&RtcHandle, &stamperstructure) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Clear the Tamper interrupt pending bit */
__HAL_RTC_TAMPER_CLEAR_FLAG(&RtcHandle,RTC_FLAG_TAMP1F);
/*##-3- Write Data on the Back Up registers ################################*/
for (index = 0; index < BACKUP_COUNT; index++)
{
HAL_RTCEx_BKUPWrite(&RtcHandle, aBKPDataReg[index], 0xDF59 + (index * 0x5A));
}
/*##-4- Check Data is stored on the Back Up registers ######################*/
for (index = 0; index < BACKUP_COUNT; index++)
{
if (HAL_RTCEx_BKUPRead(&RtcHandle, aBKPDataReg[index]) != (0xDF59 + (index * 0x5A)))
{
Error_Handler();
}
}
/* Turn LED1 on */
BSP_LED_On(LED1);
/* Reset flag after writing of backup register in order to wait for new button press */
TamperStatus = RESET;
/*##-5- Wait for the tamper button is pressed ##############################*/
while (TamperStatus != SET);
/*##-6- Deactivate the tamper ##############################*/
HAL_RTCEx_DeactivateTamper(&RtcHandle, RTC_TAMPER_1);
/*##-7- Check Data is cleared on the Back Up registers #####################*/
for (index = 0; index < BACKUP_COUNT; index++)
{
if (HAL_RTCEx_BKUPRead(&RtcHandle, aBKPDataReg[index]) != 0x00)
{
Error_Handler();
}
}
/* Infinite loop */
while (1)
{
/* Turn LED1 on */
BSP_LED_Toggle(LED1);
/* Delay */
HAL_Delay(100);
}
}
/**
* @brief System Clock Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (HSE)
* SYSCLK(Hz) = 100000000
* HCLK(Hz) = 100000000
* AHB Prescaler = 1
* APB1 Prescaler = 2
* APB2 Prescaler = 1
* HSE Frequency(Hz) = 8000000
* PLL_M = 8
* PLL_N = 200
* PLL_P = 2
* PLL_Q = 7
* PLL_R = 2
* VDD(V) = 3.3
* Main regulator output voltage = Scale1 mode
* Flash Latency(WS) = 3
* @param None
* @retval None
*/
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
HAL_StatusTypeDef ret = HAL_OK;
/* 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_BYPASS;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 200;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
RCC_OscInitStruct.PLL.PLLR = 2;
ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
if(ret != HAL_OK)
{
while(1) { ; }
}
/* 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_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3);
if(ret != HAL_OK)
{
while(1) { ; }
}
}
/**
* @brief This function is executed in case of error occurrence.
* @param None
* @retval None
*/
void Error_Handler(void)
{
/* Turn LED2 on */
BSP_LED_On(LED2);
while (1)
{
}
}
/**
* @brief Tamper event callback function
* @param RTC handle
* @retval None
*/
void HAL_RTCEx_Tamper1EventCallback(RTC_HandleTypeDef *hrtc)
{
/* LED1 On: Tamper button pressed */
BSP_LED_On(LED1);
}
#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)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/
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