path: root/Projects/P-NUCLEO-WB55.Nucleo/Examples/RTC/RTC_Tamper/Src/main.c

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    RTC/RTC_Tamper/Src/main.c
  * @author  MCD Application Team
  * @brief   This sample code shows how to use STM32WBxx 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) 2019 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
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
RTC_HandleTypeDef hrtc;

/* USER CODE BEGIN PV */

__IO FlagStatus TamperStatus;
__IO uint8_t RTCStatus = 0;

/* 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
};

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_RTC_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
  uint32_t index = 0;


  /* STM32WBxx 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
     */
  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */
  /* Configure LED2, LED3, LED1 */
  BSP_LED_Init(LED2);
  BSP_LED_Init(LED3);
  BSP_LED_Init(LED1);
  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */
    /* Configure User push-button (SW1) button */
  BSP_PB_Init(BUTTON_SW1, BUTTON_MODE_GPIO);
  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_RTC_Init();
  /* USER CODE BEGIN 2 */
  /* Clear the Tamper interrupt pending bit */
  __HAL_RTC_TAMPER_CLEAR_FLAG(&hrtc, RTC_FLAG_TAMP1F);
  /* Write Data on the Back Up registers */
  for (index = 0; index < BACKUP_COUNT; index++)
  {
    HAL_RTCEx_BKUPWrite(&hrtc, aBKPDataReg[index], 0xDF59 + (index * 0x5A));
  }

  /* Check Data is stored on the Back Up registers */
  for (index = 0; index < BACKUP_COUNT; index++)
  {
    if (HAL_RTCEx_BKUPRead(&hrtc, aBKPDataReg[index]) != (0xDF59 + (index * 0x5A)))
    {
      Error_Handler();
    }
  }

  /* Reset flag after writing of backup register in order to wait for new button press */
  TamperStatus = RESET;
  
  /* Turn LED1 on */
  BSP_LED_On(LED1);
  /* Wait for the tamper button is pressed */
  while (TamperStatus != SET)
  {
    /* Toggle LED2 with a period of 1s */
    BSP_LED_Toggle(LED2);

    /* Delay */
    HAL_Delay(1000);
  }

  /* Deactivate the tamper  */
  HAL_RTCEx_DeactivateTamper(&hrtc, RTC_TAMPER_1);

  /* Check Data is cleared on the Back Up registers */
  for (index = 0; index < BACKUP_COUNT; index++)
  {
    if (HAL_RTCEx_BKUPRead(&hrtc, aBKPDataReg[index]) != 0x00)
    {
      Error_Handler();
    }
  }

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
    /* Turn LED2 on */
    BSP_LED_Toggle(LED2);

    /* Delay */
    HAL_Delay(100);

  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
  RCC_OscInitStruct.MSIState = RCC_MSI_ON;
  RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
  RCC_OscInitStruct.PLL.PLLN = 32;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV5;
  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK4|RCC_CLOCKTYPE_HCLK2
                              |RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.AHBCLK2Divider = RCC_SYSCLK_DIV2;
  RCC_ClkInitStruct.AHBCLK4Divider = RCC_SYSCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the peripherals clocks
  */
  /* USER CODE BEGIN Smps */

  /* USER CODE END Smps */
}

/**
  * @brief RTC Initialization Function
  * @param None
  * @retval None
  */
static void MX_RTC_Init(void)
{

  /* USER CODE BEGIN RTC_Init 0 */

  /* USER CODE END RTC_Init 0 */

  RTC_TamperTypeDef sTamper = {0};

  /* USER CODE BEGIN RTC_Init 1 */

  /* USER CODE END RTC_Init 1 */
  /** Initialize RTC Only
  */
  hrtc.Instance = RTC;
  hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
  hrtc.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
  hrtc.Init.SynchPrediv = RTC_SYNCH_PREDIV;
  hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
  hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
  hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
  hrtc.Init.OutPutRemap = RTC_OUTPUT_REMAP_NONE;
  if (HAL_RTC_Init(&hrtc) != HAL_OK)
  {
    Error_Handler();
  }
  /** Enable the RTC Tamper 1
  */
  sTamper.Tamper = RTC_TAMPER_1;
  sTamper.Interrupt = RTC_TAMPER1_INTERRUPT;
  sTamper.Trigger = RTC_TAMPERTRIGGER_FALLINGEDGE;
  sTamper.NoErase = RTC_TAMPER_ERASE_BACKUP_ENABLE;
  sTamper.MaskFlag = RTC_TAMPERMASK_FLAG_DISABLE;
  sTamper.Filter = RTC_TAMPERFILTER_DISABLE;
  sTamper.SamplingFrequency = RTC_TAMPERSAMPLINGFREQ_RTCCLK_DIV32768;
  sTamper.PrechargeDuration = RTC_TAMPERPRECHARGEDURATION_1RTCCLK;
  sTamper.TamperPullUp = RTC_TAMPER_PULLUP_ENABLE;
  sTamper.TimeStampOnTamperDetection = RTC_TIMESTAMPONTAMPERDETECTION_ENABLE;
  if (HAL_RTCEx_SetTamper_IT(&hrtc, &sTamper) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN RTC_Init 2 */

  /* USER CODE END RTC_Init 2 */

}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();

}

/* USER CODE BEGIN 4 */
/**
  * @brief  Tamper event callback function
  * @param  RTC handle
  * @retval None
  */
void HAL_RTCEx_Tamper1EventCallback(RTC_HandleTypeDef *hrtc)
{
  RTCStatus = 1;
  TamperStatus = SET;
}


/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* Turn LED3 on */
  BSP_LED_On(LED3);
  /* User can add his own implementation to report the HAL error return state */
  RTCStatus = 0xE;
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#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 CODE BEGIN 6 */
  /* 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) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/