STM32F4 ADC config

SystemClock_Config(void)

{

    RCC_OscInitTypeDef RCC_OscInitStruct;

    RCC_ClkInitTypeDef RCC_ClkInitStruct;

    __HAL_RCC_PWR_CLK_ENABLE();

    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

    RCC_OscInitStruct.HSIState = RCC_HSI_ON;

    RCC_OscInitStruct.HSICalibrationValue = 16;

    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;

    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

    {

      Error_Handler();

    }

    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK

                                |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;

    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;

    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_0) != HAL_OK)

    {

      Error_Handler();

    }

    HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

    HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

    /* SysTick_IRQn interrupt configuration */

    HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);

}

void ConfigureADC(ADC_HandleTypeDef g_AdcHandle)

{

   GPIO_InitTypeDef gpioInit;

      __GPIOC_CLK_ENABLE();

      __ADC1_CLK_ENABLE();

      gpioInit.Pin = GPIO_PIN_1;

      gpioInit.Mode = GPIO_MODE_ANALOG;

      gpioInit.Pull = GPIO_NOPULL;

      HAL_GPIO_Init(GPIOC, &gpioInit);

      HAL_NVIC_SetPriority(ADC_IRQn, 0, 0);

         HAL_NVIC_EnableIRQ(ADC_IRQn);

         ADC_ChannelConfTypeDef adcChannel;

         g_AdcHandle.Instance = ADC1;

         g_AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;

         g_AdcHandle.Init.Resolution = ADC_RESOLUTION_12B;

         g_AdcHandle.Init.ScanConvMode = DISABLE;

         g_AdcHandle.Init.ContinuousConvMode = ENABLE;

         g_AdcHandle.Init.DiscontinuousConvMode = DISABLE;

         g_AdcHandle.Init.NbrOfDiscConversion = 0;

         g_AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;

         g_AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;

         g_AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;

         g_AdcHandle.Init.NbrOfConversion = 1;

         g_AdcHandle.Init.DMAContinuousRequests = ENABLE;

         g_AdcHandle.Init.EOCSelection = DISABLE;

         HAL_ADC_Init(&g_AdcHandle);

         adcChannel.Channel = ADC_CHANNEL_11;

         adcChannel.Rank = 1;

         adcChannel.SamplingTime = ADC_SAMPLETIME_480CYCLES;

         adcChannel.Offset = 0;

         if (HAL_ADC_ConfigChannel(&g_AdcHandle, &adcChannel) != HAL_OK)

         {

             asm("bkpt 255");

         }

}

int main(int argc, char* argv[])

{

  ADC_HandleTypeDef g_AdcHandle;

  g_ADCValue = 0;

... 

  ConfigureADC(&g_AdcHandle);

  HAL_ADC_Start(&g_AdcHandle);

while (1)

  {

    if (HAL_ADC_PollForConversion(&g_AdcHandle, 100) == HAL_OK)

    {

      g_ADCValue = HAL_ADC_GetValue(&g_AdcHandle);

      g_MeasurementNumber++;

    }

my_printf("ADC %u\r\n", g_ADCValue);

}