STM32 DMA中断进不去，请指教

b1011263649

 TIM_TimeBaseInitTypeDef    TIM_TimeBaseStructure;
 
 /* 使能TIM2时钟 */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
 
  /* TIM2基本定时器配置 */
 // TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
  TIM_TimeBaseStructure.TIM_Period = 999;                //定时周期 20 
  TIM_TimeBaseStructure.TIM_Prescaler = 0x0;              //预分频，不分频
  TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;          //时钟分频系数
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;   //向上计数模式
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

  /* 配置TIM2触发源 */
  TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update);

 /* 使能TIM2 */
  TIM_Cmd(TIM2, ENABLE);

}

/**
  * @brief  配置DMA
  * @param  无
  * @retval 无
  */
static void DAC_DMA_Config(void)
{ 
 DMA_InitTypeDef  DMA_InitStructure;

 /* 使能DMA2时钟 */
 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);
 
 /* 配置DMA2 */
  DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR12RD_Address;     //外设数据地址
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&DualSine12bit ;    //内存数据地址 DualSine12bit
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;           //数据传输方向内存至外设
  DMA_InitStructure.DMA_BufferSize = 32;                 //缓存大小为32字节 
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;    //外设数据地址固定 
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;         //内存数据地址自增
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word; //外设数据以字为单位
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;     //内存数据以字为单位 
 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;             //循环模式
 // DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;           //高DMA通道优先级
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;              //非内存至内存模式
 
  DMA_Init(DMA2_Channel4, &DMA_InitStructure);

 //DMA_ITConfig(DMA2_Channel4,DMA_IT_HT,ENABLE);
 DMA_ITConfig(DMA2_Channel4,DMA_IT_TC,ENABLE);
// DMA_ITConfig(DMA2_Channel4,DMA_IT_TE,ENABLE);
// DMA_SetCurrDataCounter(DMA2_Channel4,32);
 
  /* 使能DMA2-14通道 */
  DMA_Cmd(DMA2_Channel4, ENABLE);

void DMA2_Channel4_5_IRQHandler(void)
{
 if(DMA2->ISR&(1<<14)) //传输完成一半
 { 
  DMA2->IFCR|=1<<14;
  
 }
 if(DMA2->ISR&(1<<13)) //传输完成了
 { 
  //MYDMA2_Enable(DMA2_Channel3); //重新启动DMA
  DMA2->IFCR|=1<<13;
  
 }

}

正点原子

你这中断分组都没设置哦。