STM32 单ADC,多通道，DMA传输的多路数据采集

版权声明：仅供学习参考 https://blog.csdn.net/qq_27747359/article/details/86483698

一、简介

ADC相关配置分为：时钟使能，GPIO配置，ADC功能配置，DMA功能配置以及定时触发的相关配置。

二、程序

main(void) 
{	
    RCC_Configuration(); //时钟初始化 
    GPIO_Config(); //GPIO初始化 
    NVIC_Configuration(); //设置NVIC中断优先级 
    DMA_init(); //DMA传输初始化 
    IWDG_Init(6,2048); //看门狗 13.1 S 
    TIM3_Init(); //定时器初始化 
    TIM4_Init(); 
    HY14432_Init();	//液晶显示初始化 
    Adc_Init(); //ADC初始化 
    delay_ms(50); 
    while(1) 
    {	
        SYS_Mainpage(SYS_Page_Num); //显示 
        DisPic((u8 *)LCD1_array); 
        IWDG_Feed(); //喂狗 
        delay_ms(2); 
    } 
}

void Adc_Init(void)
{ 	
		ADC_InitTypeDef ADC_InitStructure; 
		GPIO_InitTypeDef GPIO_InitStructure;
            //IO设置为模拟输入		           
            GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;  
            GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;        
            GPIO_Init(GPIOA, &GPIO_InitStructure); 
		GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;  
            GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;      
            GPIO_Init(GPIOA, &GPIO_InitStructure);   
		GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5;  
            GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;      
            GPIO_Init(GPIOC, &GPIO_InitStructure);  
	
		RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1  , ENABLE );    //使能adc通道时钟
		RCC_ADCCLKConfig(RCC_PCLK2_Div4);   //设置adc分频系数，72M/4=18M(不超过14M)
	 
		ADC_DeInit(ADC1);  
		ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;  //独立模式
		ADC_InitStructure.ADC_ScanConvMode = ENABLE; //多通道
		ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;  //单次转换
		ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T3_TRGO; 
        //定时器3触发 
		ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;  //数据右对齐
		ADC_InitStructure.ADC_NbrOfChannel = 10; //顺序进行规则转化的ADC通道数目
		ADC_Init(ADC1, &ADC_InitStructure);  

		ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_7Cycles5 );  
        ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 2, ADC_SampleTime_7Cycles5 );  
        ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 3, ADC_SampleTime_7Cycles5 );  
        ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 4, ADC_SampleTime_7Cycles5 ); 
		ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 5, ADC_SampleTime_7Cycles5 );  
        ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 6, ADC_SampleTime_7Cycles5 );  
        ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 7, ADC_SampleTime_7Cycles5 );  
        ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 8, ADC_SampleTime_7Cycles5 ); 
		ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 9, ADC_SampleTime_7Cycles5 );  
        ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 10, ADC_SampleTime_7Cycles5 );  
 
		ADC_DMACmd(ADC1, ENABLE);//使能ADC1 DMA传输
		ADC_Cmd(ADC1, ENABLE);  //使能ADC1
		ADC_ExternalTrigConvCmd(ADC1, ENABLE);
		ADC_ResetCalibration(ADC1);  // 使能复位校准
		while(ADC_GetResetCalibrationStatus(ADC1));  //等待校准完成
		
		ADC_StartCalibration(ADC1);   //开启AD校准
		while(ADC_GetCalibrationStatus(ADC1));   //等待校准完成

		DMA_Cmd(DMA1_Channel1, ENABLE);//使能DMA
}	

void DMA_init(void)
{
  DMA_InitTypeDef DMA_InitStructure;
  ADC_DMACmd(ADC1, ENABLE);
  DMA_DeInit(DMA1_Channel1);
  DMA_InitStructure.DMA_PeripheralBaseAddr =(u32) &(ADC1->DR); 
  DMA_InitStructure.DMA_MemoryBaseAddr = (u32) &AD_Value; 
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize =10;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;// DMA_Mode_Normal;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(DMA1_Channel1, &DMA_InitStructure);

}