新手请教，AD+DMA中断，AD只采集一次是怎么回事？

mthgh0818

我现在使用的5个AD加DMA中断，直接把中断读出的数据发送出来，但只有第一次能读到数据，之后读不到。
 unsigned short ADC_RegularConvertedValueTab[250];
/***********************************************************
*函数名称：void ADC_Configuration(void)
*
*入口参数：无
*
*出口参数：无
*
*功能说明：ADC1初始化配置 
*************************************************************/
void ADC_Configuration(void)
{
ADC_InitTypeDef   ADC_InitStructure;
DMA_InitTypeDef   DMA_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

/* Enable clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
    RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_ADC1, ENABLE);

memset(ADC_RegularConvertedValueTab,0x00,500);
//===============ADC 输入 端口设置 ==================================================
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; 
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; 
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; 
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; 
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; 
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOB, &GPIO_InitStructure);


DMA_DeInit(DMA1_Channel1); //恢复默认值，这个是必要的

/* DMA channel1 configuration ----------------------------------------------*/
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)ADC_RegularConvertedValueTab;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 250;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; // DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);

NVIC_Configuration();
DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);        //DMA通道1传输完成中断
 
/* Enable DMA channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE);

RCC_ADCCLKConfig(RCC_PCLK2_Div8); //AD CLK 5.625k
ADC_DeInit(ADC1);
/* ADC1 configuration ------------------------------------------------------*/
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; // ENABLE;//
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 5;
ADC_Init(ADC1, &ADC_InitStructure);

/* ADC1 regular channels configuration */ 
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 2, ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_9, 3, ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 4, ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 5, ADC_SampleTime_239Cycles5);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);

/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);  

/* Enable ADC1 reset calibaration register */   
ADC_ResetCalibration(ADC1);

/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));

/* Start ADC1 calibaration */
ADC_StartCalibration(ADC1);

/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));

ADC_SoftwareStartConvCmd(ADC1, ENABLE); //使能ADC1软件开始转换

}

void DMA1_Channel1_IRQHandler(void)
{
if(DMA_GetITStatus(DMA1_IT_TC1)== SET)
 {
DMA_ClearITPendingBit(DMA1_IT_GL1); //清除全部中断标志
DMA_Cmd(DMA1_Channel1, DISABLE);
DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, DISABLE);        //DMA通道1传输完成中断
ADC_Corv_Flag=ECO_TRUE;
}
}

static void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

/* Configure one bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
/* Enable DMA channel1 IRQ Channel */
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

结果打印出的数据除了第一次是正确的之外，其余全为0.我为了确认是不是数据问题，在AnalogInputPoll函数中把ADC_RegularConvertedValueTab全置为0了。我没搞明白是因为什么。

mthgh0818

问题解决了，是中断函数里的问题，中断里不用关闭DMA，只要清中断就行