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STM32CubeF1/Projects/STM3210E_EVAL/Examples/RTC/RTC_Tamper/Src/main.c

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/**
******************************************************************************
* @file RTC/RTC_Tamper/Src/main.c
* @author MCD Application Team
* @brief This sample code shows how to use STM32F1xx RTC HAL API to write/read
* data to/from RTC Backup data registers and demonstrates the Tamper
* detection feature.
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32F1xx_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_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, RTC_BKP_DR20,
RTC_BKP_DR21, RTC_BKP_DR22, RTC_BKP_DR23,
RTC_BKP_DR24, RTC_BKP_DR25, RTC_BKP_DR26,
RTC_BKP_DR27, RTC_BKP_DR28, RTC_BKP_DR29,
RTC_BKP_DR30, RTC_BKP_DR31, RTC_BKP_DR32,
RTC_BKP_DR33, RTC_BKP_DR34, RTC_BKP_DR35,
RTC_BKP_DR36, RTC_BKP_DR37, RTC_BKP_DR38,
RTC_BKP_DR39, RTC_BKP_DR40, RTC_BKP_DR41,
RTC_BKP_DR42
};
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
uint32_t index = 0;
RTC_TamperTypeDef stamperstructure;
/* STM32F103xG 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 72 MHz */
SystemClock_Config();
/* Configure LED1, LED2, LED3 and LED4 */
BSP_LED_Init(LED1);
BSP_LED_Init(LED2);
BSP_LED_Init(LED3);
BSP_LED_Init(LED4);
/* Configure Key push-button button */
BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_GPIO);
/*##-1- Configure the RTC peripheral #######################################*/
/* Configure RTC prescaler and RTC data registers */
/* RTC configured as follow:
- Asynch Prediv = Calculated automatically by HAL */
RtcHandle.Instance = RTC;
RtcHandle.Init.AsynchPrediv = RTC_AUTO_1_SECOND;
if (HAL_RTC_Init(&RtcHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure RTC Tamper ###############################################*/
stamperstructure.Tamper = RTC_TAMPER_1;
stamperstructure.Trigger = RTC_TAMPERTRIGGER_LOWLEVEL;
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 LED2 on */
BSP_LED_On(LED2);
/* 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 LED4 on */
BSP_LED_Toggle(LED4);
/* Delay */
HAL_Delay(100);
}
}
/**
* @brief System Clock Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (HSE)
* SYSCLK(Hz) = 72000000
* HCLK(Hz) = 72000000
* AHB Prescaler = 1
* APB1 Prescaler = 2
* APB2 Prescaler = 1
* HSE Frequency(Hz) = 8000000
* HSE PREDIV1 = 1
* PLLMUL = 9
* Flash Latency(WS) = 2
* @param None
* @retval None
*/
void SystemClock_Config(void)
{
RCC_ClkInitTypeDef clkinitstruct = {0};
RCC_OscInitTypeDef oscinitstruct = {0};
/* Enable HSE Oscillator and activate PLL with HSE as source */
oscinitstruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
oscinitstruct.HSEState = RCC_HSE_ON;
oscinitstruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
oscinitstruct.PLL.PLLState = RCC_PLL_ON;
oscinitstruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
oscinitstruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&oscinitstruct)!= HAL_OK)
{
/* Initialization Error */
while(1);
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
clocks dividers */
clkinitstruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
clkinitstruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
clkinitstruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
clkinitstruct.APB2CLKDivider = RCC_HCLK_DIV1;
clkinitstruct.APB1CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&clkinitstruct, FLASH_LATENCY_2)!= HAL_OK)
{
/* Initialization Error */
while(1);
}
}
/**
* @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)
{
}
}
/**
* @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
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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