輸入數(shù)據(jù)沒后USART沒有出現(xiàn)空閑，DMA沒有接受到數(shù)據(jù)，DMA1_Channel5沒有接收到數(shù)據(jù)觸

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#include "stm32f10x.h"
u8 USART1_SEND_DATA[512];
u8 USART1_RECEIVE_DATA[512];
u8 USART1_TX_Finish=1;// USART1發(fā)送完成標志量
void USART1_Init(void); //串口1的初始化函數(shù), TX1(PA9), RX1(PA10)
void DAM_Init(void);
void NVIC_Configuration(void);
void GPIO_Configuration(void);
int main(void)
{
USART1_Init();
DAM_Init();
NVIC_Configuration();
GPIO_Configuration();

while(1)
{
}
}
void USART1_Init(void)  
{
   USART_InitTypeDef USART_InitStruct;
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
   USART_Cmd(USART1, ENABLE);
USART_InitStruct.USART_BaudRate = 9600;
USART_InitStruct.USART_WordLength = USART_WordLength_8b;
USART_InitStruct.USART_StopBits = USART_StopBits_1;
USART_InitStruct.USART_Parity = USART_Parity_No;
USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStruct);
USART_Cmd(USART1, ENABLE);
}
void DAM_Init(void)
{
   DMA_InitTypeDef DMA_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
//DMA初始化配置
    DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t)&USART1->DR; //0x40013804;
// DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)USART1_SEND_DATA;;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;    //外設(shè)作為傳輸?shù)哪康?br /> // DMA_InitStructure.DMA_BufferSize = 512;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel4, &DMA_InitStructure);

/*使USART1 DMA RX 打開*/
USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);
DMA_Cmd(DMA1_Channel4, ENABLE);
//如果使能了DMA接收
DMA_InitStructure.DMA_PeripheralBaseAddr =  (uint32_t)&USART1->DR;//  0x40013804;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)USART1_RECEIVE_DATA;;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;   //外設(shè)作為傳輸?shù)膩碓?br /> DMA_InitStructure.DMA_BufferSize = 512;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel5, &DMA_InitStructure);         
/* 使USART1 DMA TX 打開 */
USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE);
DMA_Cmd(DMA1_Channel5, ENABLE);
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure1;
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//接收中斷使能,此步驟很重要!!!
//  USART_ITConfig(USART1, USART_IT_IDLE , ENABLE);//開啟空閑,幀錯,噪聲,校驗錯中斷
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

  //DMA發(fā)送中斷配置
NVIC_InitStructure1.NVIC_IRQChannel = DMA1_Channel4_IRQn;
NVIC_InitStructure1.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure1.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure1.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure1);
//開啟DMA中斷
DMA_ITConfig(DMA1_Channel4, DMA_IT_TC, ENABLE);
// DMA_ITConfig(DMA1_Channel4, DMA_IT_TE, ENABLE);
  //DMA接收中斷配置
NVIC_InitStructure1.NVIC_IRQChannel = DMA1_Channel5_IRQn;
NVIC_InitStructure1.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure1.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure1.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure1);
//開啟DMA中斷
DMA_ITConfig(DMA1_Channel5, DMA_IT_TC, ENABLE);
// DMA_ITConfig(DMA1_Channel5, DMA_IT_TE, ENABLE);
}
void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;
//使能串口1和GPIOA時鐘
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
//配置管腳
//TX(PA9)配置為復(fù)用推挽輸出
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
// GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStruct);
//RX(PA10)配置為浮空輸入
GPIO_StructInit(&GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;
// GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStruct);
}
//DMA1_Channel4中斷服務(wù)函數(shù)
//USART1使用DMA發(fā)數(shù)據(jù)中斷服務(wù)程序
void DMA1_Channel4_IRQHandler(void)
{
  DMA_ClearITPendingBit(DMA1_IT_TC4);  //清除DMA通道x中斷待處理標志位、傳輸完成中斷
  DMA_ClearITPendingBit(DMA1_IT_TE4); //清除DMA通道x中斷待處理標志位、傳輸錯誤中斷
  DMA_Cmd(DMA1_Channel4, DISABLE);//關(guān)閉DMA
  USART1_TX_Finish=1;//置DMA傳輸完成
}
//DMA1_Channel5中斷服務(wù)函數(shù)
void DMA1_Channel5_IRQHandler(void)       //   問題是   接受中斷沒有接收到數(shù)據(jù)完成觸發(fā)
{
  DMA_ClearITPendingBit(DMA1_IT_TC5); //清除DMA通道x中斷待處理標志位、傳輸完成中斷
  DMA_ClearITPendingBit(DMA1_IT_TE5);
  DMA_Cmd(DMA1_Channel5, DISABLE);//關(guān)閉DMA,防止處理其間有數(shù)據(jù)
  DMA1_Channel5->CNDTR = 580;//重裝填
  DMA_Cmd(DMA1_Channel5, ENABLE);//處理完,重開DMA
}
void USART1_IRQHandler(void)
{
u16 DATA_LEN;
u16 i;
  if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)//如果為空閑總線中斷      //程序到這里無法往下執(zhí)行
    {
  DMA_Cmd(DMA1_Channel5, DISABLE);//關(guān)閉DMA,防止處理其間有數(shù)據(jù)
    DATA_LEN=512-DMA_GetCurrDataCounter(DMA1_Channel5);   //512-剩余待傳數(shù)量=數(shù)據(jù)數(shù)量
  if(DATA_LEN > 0)
        {   
   while(USART1_TX_Finish==0);//等待數(shù)據(jù)傳輸完成才下一次
   
            for(i=0;i             {
               USART1_SEND_DATA[i]= (uint8_t)USART_ReceiveData(USART1);
      // USART1_SEND_DATA[i]=USART1_RECEIVE_DATA[i];
            }
            //USART用DMA傳輸替代查詢方式發(fā)送，克服被高優(yōu)先級中斷而產(chǎn)生丟幀現(xiàn)象。
            DMA_Cmd(DMA1_Channel4, DISABLE); //改變datasize前先要禁止通道工作
            DMA1_Channel4->CNDTR=DATA_LEN; //DMA1,傳輸數(shù)據(jù)量   DMA_SetCurrDataCounter(DMA1_Channel4,DATA_LEN);  
            USART1_TX_Finish=0;//DMA傳輸開始標志量
            DMA_Cmd(DMA1_Channel4, ENABLE);   
  }
  //DMA_Cmd(DMA1_Channel5, DISABLE);//關(guān)閉DMA,防止處理其間有數(shù)據(jù)
  DMA_ClearFlag(DMA1_FLAG_GL5 | DMA1_FLAG_TC5 | DMA1_FLAG_TE5 | DMA1_FLAG_HT5);//清標志
  DMA1_Channel5->CNDTR = 512;//重裝填
  DMA_Cmd(DMA1_Channel5, ENABLE);//處理完,重開DMA
  i = USART1->SR;  
        i = USART1->DR; //清USART_IT_IDLE標志
}
if(USART_GetITStatus(USART1, USART_IT_PE | USART_IT_FE | USART_IT_NE) != RESET)//出錯
{
  USART_ClearITPendingBit(USART1, USART_IT_PE | USART_IT_FE | USART_IT_NE);  //奇偶錯誤中斷
}
   USART_ClearITPendingBit(USART1, USART_IT_TC);  //清除USARTx的中斷待處理位,傳輸完成中斷
   USART_ClearITPendingBit(USART1, USART_IT_IDLE);  //清除USARTx的中斷待處理位,空閑總線中斷
}