配置为                          DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR12R1_Address;        .DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;          .DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;          .DMA_Memory0BaseAddr = Memory0BaseAddr;          .DMA_DIR = DMA_DIR_MemoryToPeripheral;          .DMA_BufferSize =bufferSize;          .DMA_PeripheralInc = DMA_PeripheralInc_Disable;          .DMA_MemoryInc = DMA_MemoryInc_Enable;//¶ÁÈ¡Êý¾ÝµÄÄÚ´æµØÖ·µÝÔö          .DMA_Mode = DMA_Mode_Circular;          .DMA_Priority = DMA_Priority_High;          .DMA_FIFOMode = DMA_FIFOMode_Disable;        .DMA_FIFOThreshold = DMA_FIFOThreshold_Full;        .DMA_MemoryBurst = DMA_MemoryBurst_Single;        .DMA_PeripheralBurst = DMA_PeripheralBurst_Single;        DMA_Init(DMA_STREAM_DAC, &DMA_InitStructure);}以0x0800填充memory,会有“嘀”的一声，按我设置的缓存大小应该是在DMA 传输一半跟结束的时候出现的。请问有没有人遇到过这种情况？之前在STM32F1上用过是可以的，没有这种噪声。

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