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STM32 nucleo board internal rtc problem.

Question asked by AVINASH PATHAK on Aug 28, 2017
Latest reply on Aug 30, 2017 by AVINASH PATHAK

I am using stm32 nucleo-l073rz for a project.Currently I am working on internal rtc.I am facing some problems with this peripheral i am getting nothing on lcd but 00 as time filelds.I want to see a digital clock on lcd using internal rtc.I am using keil and stmcubemx with board.I have attached images with this post.Please have a look at it.

This is the main.c file programme.

 

/**
  ******************************************************************************
  * File Name          : main.c
  * Description        : Main program body
  ******************************************************************************
  *
  * 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 "stm32l0xx_hal.h"
#include "lcd_hd44780_stm32l0.h"

 

/* USER CODE BEGIN Includes */

 

/* USER CODE END Includes */

 

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

 

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
 uint8_t sec;
/* USER CODE END PV */

 

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Error_Handler(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 */

 

/* 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();

 

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

 

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

 

  /* USER CODE BEGIN 2 */
    RTC_TimeTypeDef RTC_Time;
    HAL_RTC_GetTime(&hrtc,&RTC_Time,RTC_FORMAT_BCD);
    sec=RTC_Time.Seconds;
    LCDInit(0X01);
    RTC_Time.Hours=0X05;
    RTC_Time.Minutes=0x05;
    RTC_Time.Seconds=0x00;
    HAL_RTC_SetTime(&hrtc,&RTC_Time,RTC_FORMAT_BCD);

 

  /* USER CODE END 2 */

 

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

 

  /* USER CODE BEGIN 3 */
        HAL_RTC_GetTime(&hrtc,&RTC_Time,RTC_FORMAT_BCD);
      sec=RTC_Time.Seconds;
        LCDGotoXY(5,1);
        LCDWriteInt(sec,2);
        HAL_Delay(500);
        LCDCmd(0X01);

 

  }
  /* USER CODE END 3 */

 

}

 

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

 

  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_PeriphCLKInitTypeDef PeriphClkInit;

 

    /**Configure the main internal regulator output voltage
    */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

 

    /**Initializes the CPU, AHB and APB busses clocks
    */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_LSE;
  RCC_OscInitStruct.LSEState = RCC_LSE_ON;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = 16;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_4;
  RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

 

    /**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_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

 

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
  {
    Error_Handler();
  }

 

  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_RTC;
  PeriphClkInit.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    Error_Handler();
  }

 

    /**Configure LSE Drive Capability
    */
  __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);

 

    /**Configure the Systick interrupt time
    */
  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

 

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

 

  /* SysTick_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}

 

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

 

  RTC_TimeTypeDef sTime;
  RTC_DateTypeDef sDate;

 

    /**Initialize RTC Only
    */
  hrtc.Instance = RTC;
  hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
  hrtc.Init.AsynchPrediv = 127;
  hrtc.Init.SynchPrediv = 255;
  hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
  hrtc.Init.OutPutRemap = RTC_OUTPUT_REMAP_NONE;
  hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
  hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
  if (HAL_RTC_Init(&hrtc) != HAL_OK)
  {
    Error_Handler();
  }

 

    /**Initialize RTC and set the Time and Date
    */
  sTime.Hours = 0x0;
  sTime.Minutes = 0x0;
  sTime.Seconds = 0x0;
  sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
  sTime.StoreOperation = RTC_STOREOPERATION_RESET;
  if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BCD) != HAL_OK)
  {
    Error_Handler();
  }

 

  sDate.WeekDay = RTC_WEEKDAY_MONDAY;
  sDate.Month = RTC_MONTH_JANUARY;
  sDate.Date = 0x1;
  sDate.Year = 0x0;

 

  if (HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BCD) != HAL_OK)
  {
    Error_Handler();
  }

 

    /**Enable the WakeUp
    */
  if (HAL_RTCEx_SetWakeUpTimer(&hrtc, 0, RTC_WAKEUPCLOCK_RTCCLK_DIV16) != HAL_OK)
  {
    Error_Handler();
  }

 

    /**Enable the TimeStamp
    */
  if (HAL_RTCEx_SetTimeStamp(&hrtc, RTC_TIMESTAMPEDGE_RISING, RTC_TIMESTAMPPIN_DEFAULT) != HAL_OK)
  {
    Error_Handler();
  }

 

}

 

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

 

  GPIO_InitTypeDef GPIO_InitStruct;

 

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

 

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_2|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12
                          |GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15, GPIO_PIN_RESET);

 

  /*Configure GPIO pins : PB2 PB10 PB11 PB12
                           PB13 PB14 PB15 */
  GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12
                          |GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

 

}

 

/* USER CODE BEGIN 4 */

 

/* USER CODE END 4 */

 

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler */
  /* User can add his own implementation to report the HAL error return state */
  while(1)
  {
  }
  /* USER CODE END Error_Handler */
}

 

#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****/

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