为什么我配置的DMA一直产生中断啊？而且标志位都置一了

wmh19910511 · 发表于 2015-5-31 03:00:48

void ADC_DMA_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
DMA_DeInit(DMA1_Channel1); //DMA??
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&g_DSO.buffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 1024; //ADC?????
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //ADC?????16?
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //????????16?
// DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
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);
DMA_Cmd(DMA1_Channel1,ENABLE); //DMA??

DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE);
DMA1->IFCR|=1<<1;
}

void DMA_Enable(DMA_Channel_TypeDef*DMA_CHx)
{
DMA_CHx->CCR&=~(1<<0);
DMA_CHx->CNDTR=1024;
DMA_CHx->CCR|=1<<0;
}
void DMA1_Channel1_IRQHandler(void)
{
if((DMA1->ISR)&(1<<1))
{
TIM_Cmd(TIM2, DISABLE);
SD_flag=1;
}
DMA1->IFCR|=1<<1;
// DMA_Enable(DMA1_Channel1);
DMA1->IFCR|=1<<0;
DMA1->IFCR|=1<<2;
}

我设置的是正常模式，为什么中断还是一直产生嗯？