STM32F4 ADC config

[gulli (Gast)]

Hallo zusammen,

ich bekomme meinen SMT32F411RE leider nicht so configuriert, dass er den 
ADC-Wert an PC1 misst.

ich hoffe es kann jemand helfen...

_init_Hardware.c

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");
         }
}

main.c

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);
}

[hp-freund (Gast)]

Da fehlt aber noch etwas.

ADC_EXTERNALTRIGCONV_T1_CC1;
DMAContinuousRequests = ENABLE;

Wo wird Timer 1 eingestellt? Wo DMA?

Schau dir das in CubeMX an, dann wird vieles klarer.