使用STM32CubeMX生成RTC工程[闹钟中断]

使用的硬件为正点原子的MINISTM32。

需要主要注意：

STM32F1系列

<UM1850 User manual Description of STM32F1xx HAL drivers >

WARNING: Drivers Restrictions
RTC version used on STM32F1 families is version V1. All the features supported by V2(other families) will be not supported on F1.
As on V2, main RTC features are managed by HW. But on F1, date feature is completely managed by SW.

好了我们开始吧

工程测试代码

/**
  ******************************************************************************
  * File Name          : main.c
  * Description        : Main program body
  ******************************************************************************
  ** This notice applies to any and all portions of this file
  * that are not between comment pairs USER CODE BEGIN and
  * USER CODE END. Other portions of this file, whether
  * inserted by the user or by software development tools
  * are owned by their respective copyright owners.
  *
  * COPYRIGHT(c) 2017 STMicroelectronics
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f1xx_hal.h"

/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

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

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
/* Buffer used for displaying Time */
uint8_t aShowTime[50] = {0};
uint8_t rtc_alarm_flag = 0;
/* 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 */
/* Private function prototypes -----------------------------------------------*/

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */

uint8_t BIN2BCD(uint8_t byte)
{
    uint8_t low, high;
    low = byte & 0x0F;
    high = ((byte >> ) & 0x0F) * ;
    return high + low;
}

uint8_t BCD2BIN(uint8_t byte)
{
    return ((byte/)<<) + (byte%);
}

/**
  * @brief  Configure the current time and date.
  * @param  None
  * @retval None
  */
static void RTC_AlarmConfig(void)
{

    RTC_AlarmTypeDef salarmstructure;

    /*##-1- Configure the RTC Alarm peripheral #################################*/
    /* Set Alarm to 01:17:30
       RTC Alarm Generation: Alarm on Hours, Minutes and Seconds */
    salarmstructure.Alarm = RTC_ALARM_A;
    salarmstructure.AlarmTime.Hours = 0x1;
    salarmstructure.AlarmTime.Minutes = 0x17;
    salarmstructure.AlarmTime.Seconds = 0x30;

    if(HAL_RTC_SetAlarm_IT(&hrtc,&salarmstructure,RTC_FORMAT_BCD) != HAL_OK)
    {
        /* Initialization Error */
        Error_Handler();
    }
}

/**
  * @brief  Display the current time.
  * @param  showtime : pointer to buffer
  * @retval None
  */
static void RTC_TimeShow(uint8_t* showtime)
{
    RTC_DateTypeDef sdatestructureget;
    RTC_TimeTypeDef stimestructureget;

    /* Get the RTC current Time */
    HAL_RTC_GetTime(&hrtc, &stimestructureget, RTC_FORMAT_BIN);
    /* Get the RTC current Date */
    HAL_RTC_GetDate(&hrtc, &sdatestructureget, RTC_FORMAT_BIN);
    /* Display time Format : hh:mm:ss */
    sprintf((char*)showtime,"%02d:%02d:%02d",stimestructureget.Hours, stimestructureget.Minutes, stimestructureget.Seconds);
}
/* USER CODE END 0 */

int main(void)
{

    /* USER CODE BEGIN 1 */

    /* USER CODE END 1 */

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

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

    /* USER CODE BEGIN Init */

    /* USER CODE END Init */

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

    /* USER CODE BEGIN SysInit */

    /* USER CODE END SysInit */

    /* Initialize all configured peripherals */
    MX_GPIO_Init();
    MX_RTC_Init();

    /* USER CODE BEGIN 2 */

    /*##-1- Configure Alarm ####################################################*/
    /* Configure RTC Alarm */
    RTC_AlarmConfig();
    /* USER CODE END 2 */

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

        /* USER CODE BEGIN 3 */
        /*##-2- Display the updated Time #########################################*/
        RTC_TimeShow(aShowTime);
    }
    /* USER CODE END 3 */

}

/** System Clock Configuration
*/
void SystemClock_Config(void)
{

    RCC_OscInitTypeDef RCC_OscInitStruct;
    RCC_ClkInitTypeDef RCC_ClkInitStruct;
    RCC_PeriphCLKInitTypeDef PeriphClkInit;

    /**Initializes the CPU, AHB and APB busses clocks
    */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.LSIState = RCC_LSI_ON;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    /**Initializes the CPU, AHB and APB busses clocks
    */
    RCC_ClkInitStruct.ClockType = 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_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_RTC;
    PeriphClkInit.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    /**Configure the Systick interrupt time
    */
    HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/);

    /**Configure the Systick
    */
    HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

    /* SysTick_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(SysTick_IRQn, , );
}

/* RTC init function */
static void MX_RTC_Init(void)
{

    RTC_TimeTypeDef sTime;
    RTC_DateTypeDef DateToUpdate;

    /**Initialize RTC Only
    */
    hrtc.Instance = RTC;
    hrtc.Init.AsynchPrediv = RTC_AUTO_1_SECOND;
    hrtc.Init.OutPut = RTC_OUTPUTSOURCE_NONE;
    if (HAL_RTC_Init(&hrtc) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    /**Initialize RTC and set the Time and Date
    */
    if(HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR1) != 0x32F2)
    {
        sTime.Hours = 0x1;
        sTime.Minutes = 0x17;
        sTime.Seconds = 0x0;

        if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BCD) != HAL_OK)
        {
            _Error_Handler(__FILE__, __LINE__);
        }

        DateToUpdate.WeekDay = RTC_WEEKDAY_FRIDAY;
        DateToUpdate.Month = RTC_MONTH_JULY;
        DateToUpdate.Date = 0x14;
        DateToUpdate.Year = 0x17;

        if (HAL_RTC_SetDate(&hrtc, &DateToUpdate, RTC_FORMAT_BCD) != HAL_OK)
        {
            _Error_Handler(__FILE__, __LINE__);
        }

        HAL_RTCEx_BKUPWrite(&hrtc,RTC_BKP_DR1,0x32F2);
    }

}

/** Configure pins as
        * Analog
        * Input
        * Output
        * EVENT_OUT
        * EXTI
*/
static void MX_GPIO_Init(void)
{

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

}

/* USER CODE BEGIN 4 */
/**
  * @brief  Alarm callback
  * @param  hrtc : RTC handle
  * @retval None
  */
void HAL_RTC_AlarmAEventCallback(RTC_HandleTypeDef *hrtc)
{
    rtc_alarm_flag++;
}
/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void _Error_Handler(char * file, int line)
{
    /* USER CODE BEGIN Error_Handler_Debug */
    /* User can add his own implementation to report the HAL error return state */
    while()
    {
    }
    /* 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

/**
  * @}
  */

/**
  * @}
*/

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