ADC采集DMA传输出现问题

只看该作者 · 2024-10-24 10:55

我用ADC采集三路电压，然后用DMA传输，但是我对DMA传输一半和传输完成设置了中断，但是似乎并没有进入到中断函数中，以下是我的程序，大神们请看看哪里出错了？
NVIC_InitTypeDef NVIC_InitStructure;
  DMA_InitTypeDef DMA_InitStructure;
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);       //ê1ÄüDMA′«êä

      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);

  DMA_DeInit(DMA1_Channel1); //½«DMAμÄí¨μà1¼Ä′æÆ÷ÖØéèÎaè±ê¡Öμ
      //DMA1_MEM_LEN=cndtr;
      DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR;  //DMAíaéè»ùμØÖ·
      DMA_InitStructure.DMA_MemoryBaseAddr = (u32)AD_Value;  //DMAÄú′æ»ùμØÖ·
      DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;  //êy¾Y′«êä·½Ïò￡¬′óÄú′æ¶áè¡·￠Ëíμ½íaéè
      DMA_InitStructure.DMA_BufferSize = M*N;  //DMAí¨μàμÄDMA»o′æμÄ′óD¡
      DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;  //íaéèμØÖ·¼Ä′æÆ÷2»±ä
      DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;  //Äú′æμØÖ·¼Ä′æÆ÷μYÔö
      DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;  //êy¾Y¿í¶èÎa8Î»
      DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word; //êy¾Y¿í¶èÎa8Î»
      DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;  //1¤×÷ÔúÕy3￡Ä￡ê½
      DMA_InitStructure.DMA_Priority = DMA_Priority_High; //DMAí¨μà xóμóDÖDóÅÏè¼¶
      DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;  //DMAí¨μàxÃ»óDéèÖÃÎaÄú′æμ½Äú′æ′«êä
      DMA_Init(DMA1_Channel1, &DMA_InitStructure);  //¸ù¾YDMA_InitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉDMAμÄí¨μàUSART1_Tx_DMA_ChannelËù±êê¶μÄ¼Ä′æÆ÷

      DMA_ITConfig(DMA1_Channel1, DMA_IT_HT,ENABLE);//′«êä1y°ë
      DMA_ITConfig(DMA1_Channel1, DMA_IT_TC,ENABLE);//′«êäíê3éÖD¶Ï

   DMA_Cmd(DMA1_Channel1, ENABLE);
以上是我的DMA设置，
void DMA1_Channel1_IRQHandler(void)
{
      if(DMA_GetITStatus(DMA1_IT_HT1)!=RESET)
      {
            DMA_ClearITPendingBit(DMA1_IT_HT1);//′«êäò»°ë
            DMA_ClearFlag(DMA1_FLAG_HT1);
            flag=1;
      }
      if(DMA_GetITStatus(DMA1_IT_TC1)!=RESET)
      {
            DMA_ClearITPendingBit(DMA1_IT_TC1);//′«êäíê3é±êÖ¾
DMA_ClearFlag(DMA1_FLAG_TC1);
            flag=2;
      }

}

这是我的中断函数，设置在STM32f10x_it.c.，然后adc我也都设置好了，但是这个flag似乎一直不变为1，我设置是传输到一半就变为1 啊