STM32CubeMX ile STM32F4 ADC Polling Method Örneği

Konu, 'Geliştirme Kartları' kısmında Veysel Gökdemir tarafından paylaşıldı.

Etiketler:
  1. Veysel Gökdemir

    Veysel Gökdemir MB Üyesi

    Kayıt:
    3 Nisan 2017
    Mesajlar:
    11
    Beğeniler:
    5
    Meslek:
    Elektrik Elektronik Mühendisi
    En İyi Cevap:
    0
    Değerlendiriler:
    +5 / 0 / -0
    Üniversite:
    KTÜ , SÜ
    Kod:
    #include "main.h"
    #include "stm32f4xx_hal.h"
    
    #define VREFIN_CAL ((uint16_t*)((uint32_t)0x1FFF7A2A))   //Vrefin calibration degeri memoriden okunuyor
    /* USER CODE BEGIN Includes */
    
    uint16_t adc_raw[2];
    float Vadc=0, Vrefin=0, VDDA;
    int count=0;
    /* USER CODE END Includes */
    
    /* Private variables ---------------------------------------------------------*/
    ADC_HandleTypeDef hadc1;
    
    /* USER CODE BEGIN PV */
    /* Private variables ---------------------------------------------------------*/
    
    /* USER CODE END PV */
    
    /* Private function prototypes -----------------------------------------------*/
    void SystemClock_Config(void);
    void Error_Handler(void);
    static void MX_GPIO_Init(void);
    static void MX_ADC1_Init(void);
    
    /* USER CODE BEGIN PFP */
    /* Private function prototypes -----------------------------------------------*/
    void ADC_Calculation()
    {
        //Poll conversion için atadigimiz timeout degeri sürekli kontrol edilir
        //ta ki ADC single kanal çevrimi tamamlanana kadar. Bir tane kanal degeri okundugunda
        //Poll Conversion içinde yazdigimiz islemler gerceklesir. Sonra yine set edilir timeout degeri.
        //Polling süresi yani timeout süresi içinde ADC islemi, çevrimi bitmedigi zaman baska bir isleme mcu geçmez.
        if(HAL_ADC_PollForConversion(&hadc1, 1000000) == HAL_OK)
        {
            adc_raw[count] = HAL_ADC_GetValue(&hadc1);     //ADC verisini adc_raw dizisine kaydet         
            count++;                                           //count=0 ise ADC1 channel 2 raw degerini oku
            if(count == 2)                                    //count=1 ise ADC1 vrefin raw degerini oku
                count = 0;                                     //count resetlensin
    
            VDDA = (float)3.3*(*VREFIN_CAL)/adc_raw[1];  //real Vref degeri
            Vrefin = VDDA*adc_raw[1]/4095;               //Vrefin degeri
            Vadc = VDDA*adc_raw[0]/4095;                     //Vadc degeri
        }       
    }
       
       
       
             
       
         
    
    /* 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_ADC1_Init();
    
      /* USER CODE BEGIN 2 */
      HAL_ADC_Start(&hadc1);   //ADC islemini baslat
      /* USER CODE END 2 */
    
      /* Infinite loop */
      /* USER CODE BEGIN WHILE */
      while (1)
      {
     
      ADC_Calculation();       
      
    
      }
      /* USER CODE END 3 */
    
    }
    
    /** System Clock Configuration
    */
    void SystemClock_Config(void)
    {
    
      RCC_OscInitTypeDef RCC_OscInitStruct;
      RCC_ClkInitTypeDef RCC_ClkInitStruct;
    
        /**Configure the main internal regulator output voltage
        */
      __HAL_RCC_PWR_CLK_ENABLE();
    
      __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
    
        /**Initializes the CPU, AHB and APB busses clocks
        */
      RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
      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.PLLM = 8;
      RCC_OscInitStruct.PLL.PLLN = 120;
      RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
      RCC_OscInitStruct.PLL.PLLQ = 4;
      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_DIV4;
      RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
    
      if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
      {
        Error_Handler();
      }
    
        /**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);
    }
    
    /* ADC1 init function */
    static void MX_ADC1_Init(void)
    {
    
      ADC_ChannelConfTypeDef sConfig;
    
        /**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
        */
      hadc1.Instance = ADC1;
      hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
      hadc1.Init.Resolution = ADC_RESOLUTION_12B;
      hadc1.Init.ScanConvMode = ENABLE;
      hadc1.Init.ContinuousConvMode = ENABLE;
      hadc1.Init.DiscontinuousConvMode = DISABLE;
      hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
      hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
      hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
      hadc1.Init.NbrOfConversion = 2;
      hadc1.Init.DMAContinuousRequests = DISABLE;
      hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
      if (HAL_ADC_Init(&hadc1) != HAL_OK)
      {
        Error_Handler();
      }
    
        /**Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
        */
      sConfig.Channel = ADC_CHANNEL_2;
      sConfig.Rank = 1;
      sConfig.SamplingTime = ADC_SAMPLETIME_144CYCLES;
      if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
      {
        Error_Handler();
      }
    
        /**Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
        */
      sConfig.Channel = ADC_CHANNEL_VREFINT;
      sConfig.Rank = 2;
      if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
      {
        Error_Handler();
      }
    
    }
    
    /** Pinout Configuration
    */
    static void MX_GPIO_Init(void)
    {
    
      /* GPIO Ports Clock Enable */
      __HAL_RCC_GPIOA_CLK_ENABLE();
    
    }
    
    /* 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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