我现在在做一个ADC规则通道采集多路感应电压（ADC1和ADC2），我用的是软件自身触发的方式，我一共有八个通道，ADC1，ADC2各四个，用的是软件触发，我也设置一个中断标志sign(初始为0)，进入DMA（DMA1_Channel1）后sign=1，同时进行相应的数据处理，在DMA_ClearITPendingBit(DMA_IT_TC)后sign置0，出DMA中断后继续进行AD采集，但我发现ADC就采集过一次，DMA中断也只进入过一次，我也不知问题在哪里
 
#include "ADC12.h"
#include "UART.h"
#include "systick.h"

// ****************************************************************************
// 常 数 宏 定 义  *
#define ADC1_DR_Address    ((uint32_t)0x4001244C)
__IO uint32_t ADC12_ValueBuffer[4];
#define   N  7

// ****************************************************************************
// 函数名称: 
// 功能描述: 
// 输　  入: 
// 输  　出: 
// 全局变量:
// 调用模块: 
void ACD12Init(void)
{ 
  ADC_InitTypeDef  ADC_InitStructure;
  DMA_InitTypeDef  DMA_InitStructure;
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;
  NVIC_InitTypeDef NVIC_InitStructure ;
  GPIO_InitTypeDef GPIO_InitStructure;
 
  /* GPIOC Configurationin6, 7, 8 and 9 as alternate function AIN */ 
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC, ENABLE);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3| GPIO_Pin_4| GPIO_Pin_5| GPIO_Pin_6| GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure); 

  //DMA
  /* Enable DMA1 and DMA2 clocks */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* DMA1 channel1 configuration ----------------------------------------------*/
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ADC12_ValueBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 4;   //控制每次ADC采集的数据个数,由于是双通道，即每个通道采集4*2/N个数据,N为通道个数
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_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
/* Enable DMA1 Channel1 */
//DMA_Cmd(DMA1_Channel1, ENABLE);
DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE) ;
/* ADC1 configuration ------------------------------------------------------*/
RCC_ADCCLKConfig(RCC_PCLK2_Div6);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE );
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC2, ENABLE );  //ADC1,ADC2时钟使能

ADC_InitStructure.ADC_Mode = ADC_Mode_RegSimult;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 4;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channels configuration */ 
ADC_RegularChannelConfig(ADC1, AD_Channel,1, ADC_SampleTime_7Cycles5 );   //PB1,配置为同步规则模式，ADC1，ADC2，转换顺序为1,2,3,4.。。。
ADC_RegularChannelConfig(ADC1, AD_Channe3,2, ADC_SampleTime_7Cycles5 );   //PA7
ADC_RegularChannelConfig(ADC1, AD_Channe5,3, ADC_SampleTime_7Cycles5 );   //PA5
ADC_RegularChannelConfig(ADC1, AD_Channe7,4, ADC_SampleTime_7Cycles5 );   //PA4
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* ADC2 configuration ------------------------------------------------------*/
ADC_InitStructure.ADC_Mode = ADC_Mode_RegSimult;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 4;
ADC_Init(ADC2, &ADC_InitStructure);
/* ADC2 regular channels configuration */ 
ADC_RegularChannelConfig(ADC2, AD_Channe8,4, ADC_SampleTime_7Cycles5 );   //Vref
ADC_RegularChannelConfig(ADC2, AD_Channe6,3, ADC_SampleTime_7Cycles5 );   //PA4
ADC_RegularChannelConfig(ADC2, AD_Channe4,2, ADC_SampleTime_7Cycles5 );   //PA6
ADC_RegularChannelConfig(ADC2, AD_Channe2,1, ADC_SampleTime_7Cycles5 );   //PC5
/* Enable ADC2 external trigger conversion */
ADC_ExternalTrigConvCmd(ADC2, ENABLE);  //外部触发源来自ADC1的规则组多路器(由/* Enable ADC2 */
ADC_Cmd(ADC2, ENABLE);
/* Enable ADC2 reset calibration register */   
ADC_ResetCalibration(ADC2);
/* Check the end of ADC2 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC2));
/* Start ADC2 calibration */
ADC_StartCalibration(ADC2);
/* Check the end of ADC2 calibration */
while(ADC_GetCalibrationStatus(ADC2));
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Enable Vrefint channel17 */
ADC_TempSensorVrefintCmd(ENABLE);
/* Enable ADC1 reset calibration register */   
ADC_ResetCalibration(ADC1);
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));
/* Start ADC1 calibration */
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));
/* Start ADC1 Software Conversion */ 
//ADC_ExternalTrigConvCmd(ADC1, ENABLE);
/* Test on DMA1 channel1 transfer complete flag */
//while(RESET==DMA_GetFlagStatus(DMA1_FLAG_TC1));   //容易卡在这里我就屏蔽了
/* Clear DMA1 channel1 transfer complete flag */
//DMA_ClearFlag(DMA1_FLAG_TC1);
//while(RESET==DMA_GetFlagStatus(DMA1_FLAG_TC1));       
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn ;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0 ;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE ;
NVIC_Init(&NVIC_InitStructure);
//TIM_Cmd(TIM4,ENABLE);
return;
 }
// *****************************************************************************
// 函数名称: 
// 功能描述:  
// 输　  入:
// 输　  出: 
// 全局变量:
// 调用模块: 
extern uint8_t sign ; // 将7路外部AD口的数据分为七组，依次编号为0,1,2,3.....
uint16_t p,j,k=0;
uint16_t Value1[N],Value2[N],Value3[N],Value4[N],Value5[N],Value6[N],Value7[N];
uint32_t Sum0=0,Sum1=0,Sum2=0,Sum3=0,Sum4=0,Sum5=0,Sum6=0,Sum7=0;
void DMA1_Channel1_IRQHandler(void)
{ if(DMA_GetITStatus(DMA_IT_TC)!= RESET)
   { 
       p++;                      //想看看进入过中断几次
      sign = 1;                 //sign=1,表示七通道采集轮询一次完成  
  DMA_Cmd(DMA1_Channel1, DISABLE);
  //ADC_SoftwareStartConvCmd(ADC1, DISABLE);
      for(k=0,j=0;k>16)&0x0000ffff))|0x1000; 
              Sum2+=Value2[j];
              Value3[j]=((ADC12_ValueBuffer[k+1]&0x0000ffff))|0x2000;
              Sum3+=Value3[j];
              Value4[j]=((ADC12_ValueBuffer[k+1]>>16)&0x0000ffff)|0x3000; 
              Sum4+=Value4[j];
  Value5[j]=(ADC12_ValueBuffer[k+2]&0x0000ffff)|0x4000;
              Sum5+=Value5[j];
              Value6[j]=((ADC12_ValueBuffer[k+2]>>16)&0x0000ffff)|0x5000; 
              Sum6+=Value6[j];
  Value7[j]=(ADC12_ValueBuffer[k+3]&0x0000ffff)|0x6000;
              Sum7+=Value7[j]; 
    }          
    //DMA_Configuration() ;
   //DelayMS(100);
   }               
DMA_Cmd(DMA1_Channel1, ENABLE);
//ADC_SoftwareStartConvCmd(ADC1, ENABLE);
DMA_ClearITPendingBit(DMA_IT_TC); 
sign = 0 ;
 }
 

清除中断标志位了吗？