本帖最后由 AoXintech 于 2019-2-27 17:09 编辑

初始化函数如下:
#include "adc.h"
#include "usart.h"
#include "delay.h"                 

vu16 ADC1ConvertedValue[256];
float adc_Value[NPT*2];
u16 adc_Count=0;
_Bool adc_sample = DISABLE;


//ADC_DMA初始化配置
void Adc_DMA_Init(void)
{
        GPIO_InitTypeDef  GPIO_InitStructure;
        ADC_CommonInitTypeDef ADC_CommonInitStructure;
        ADC_InitTypeDef       ADC_InitStructure;
        DMA_InitTypeDef        DMA_InitStructure;
        NVIC_InitTypeDef NVIC_InitStructure;
        
        RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC|RCC_AHB1Periph_DMA2, ENABLE);//使能GPIOA时钟
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); //使能ADC1时钟
        
        DMA_DeInit(DMA2_Stream0);
        DMA_InitStructure.DMA_Channel =DMA_Channel_0;
  DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
  DMA_InitStructure.DMA_Memory0BaseAddr =(uint32_t)&ADC1ConvertedValue;//内存存储基地址
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  DMA_InitStructure.DMA_BufferSize = 256;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//关闭接收一次数据后，目标内存地址后移
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//DMA搬移数据尺寸
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;         
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_Init(DMA2_Stream0, &DMA_InitStructure);
  DMA_Cmd(DMA2_Stream0, ENABLE);
        
        NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn;
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);
        
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;//PC3 通道13
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;//模拟输入
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;//不带上下拉
  GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化  

        RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,ENABLE);          //ADC1复位
        RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,DISABLE);        //复位结束
        
        ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;//独立模式
  ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;//两个采样阶段之间的延迟5个时钟
  ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1; //DMA失能(默认模式)
  ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div4;//预分频4分频。ADCCLK=PCLK2/4=84/4=21Mhz,ADC时钟最好不要超过36Mhz
  ADC_CommonInit(&ADC_CommonInitStructure);//初始化
        
  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;//12位模式
  ADC_InitStructure.ADC_ScanConvMode = DISABLE;//非扫描模式        
  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;//关闭连续转换
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;//禁止触发检测，使用软件触发
        ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//右对齐        
  ADC_InitStructure.ADC_NbrOfConversion = 13;//1个转换在规则序列中 也就是只转换规则序列1
  ADC_Init(ADC1, &ADC_InitStructure);//ADC初始化
        ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 1, ADC_SampleTime_3Cycles);
        
//         /* Enable DMA request after last transfer (Single-ADC mode) */
  ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);

  ADC_DMACmd(ADC1, ENABLE);  
        
        ADC_Cmd(ADC1, ENABLE);//开启AD转换器
}

void DMA_Configuration(void)
{
  DMA_InitTypeDef DMA_InitStructure;

        RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);

        DMA_InitStructure.DMA_Channel = DMA_Channel_0;  
  DMA_InitStructure.DMA_PeripheralBaseAddr =((u32)0x40012400+0x4c);
  DMA_InitStructure.DMA_Memory0BaseAddr =(uint32_t)&ADC1ConvertedValue;//内存存储基地址
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  DMA_InitStructure.DMA_BufferSize = 256;//DMA_BufferSize 就是要传输的次数
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//关闭接收一次数据后，目标内存地址后移
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//DMA搬移数据尺寸
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;         
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_Init(DMA2_Stream0, &DMA_InitStructure);
  DMA_Cmd(DMA2_Stream0, ENABLE);
}

void DMA2_Stream0_IRQHandler(void)
{                        
        if(DMA_GetITStatus(DMA2_Stream0, DMA_IT_TCIF0))
  {
                adc_sample = ENABLE;
                //USART_SendString(USART2,"mark");
  }
        DMA_ClearITPendingBit(DMA2_Stream0, DMA_IT_TCIF0);
}