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。 问题网址:https://www.stmcu.org.cn/faq/index/detail/id-70549 |
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