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GD32107C-EVAL的内部资源灰常滴丰富啊，这个ADC资源用处也非常广泛。看到板子上有个电位器就总是手痒去扭扭，那干脆做个实验来感受一下。

PC3是ADC的13通道。采用连续转换模式。这次实验作为初步体验ADC，下一个实验准备结合通道16来测试温度，并用上DMA功能。

void  AdcInit()
{
    GPIO_InitTypeDef    GPIO_InitStruct;
	  ADC_InitTypeDef     ADC_InitStruct;
	  NVIC_InitTypeDef    NVIC_InitStruct;
	  RCC_APB2PeriphClockCmd (RCC_APB2Periph_ADC1, ENABLE);
	  RCC_ADCCLKConfig (RCC_PCLK2_Div6);
	  RCC_APB2PeriphClockCmd (RCC_APB2Periph_GPIOC,ENABLE);
	  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AIN ;
	  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_3;
	  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz ;
	  GPIO_Init (GPIOC,&GPIO_InitStruct);
	
	  ADC_InitStruct.ADC_ContinuousConvMode = ENABLE ;
	  ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
	  ADC_InitStruct.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
	  ADC_InitStruct.ADC_Mode = ADC_Mode_Independent;
	  ADC_InitStruct.ADC_NbrOfChannel = 1;
	  ADC_InitStruct.ADC_ScanConvMode = ENABLE ;
	  ADC_Init (ADC1,&ADC_InitStruct);
	  ADC_Cmd (ADC1,ENABLE);
	  ADC_ResetCalibration(ADC1);
	  while(ADC_GetResetCalibrationStatus(ADC1) == SET)
		{
         ;
    }
    ADC_StartCalibration(ADC1);	
		while(ADC_GetCalibrationStatus(ADC1) == SET)
		{
         ;
    }
	  
	  ADC_RegularChannelConfig(ADC1,ADC_Channel_13,1,ADC_SampleTime_239Cycles5);
		ADC_ITConfig (ADC1,ADC_IT_EOC,ENABLE);
		
		
		NVIC_InitStruct.NVIC_IRQChannel = ADC1_2_IRQn;
		NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
		NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 2;
		NVIC_InitStruct.NVIC_IRQChannelSubPriority = 2;
		NVIC_Init(&NVIC_InitStruct);
    ADC_SoftwareStartConvCmd (ADC1,ENABLE);
}

void  ADC1_2_IRQHandler()
{
    if(ADC_GetITStatus(ADC1,ADC_IT_EOC) == SET)
		{
        gAdcVal = ADC_GetConversionValue(ADC1);
        ADC_ClearITPendingBit (ADC1,ADC_IT_EOC);
    }


}