苏浅叶 发表于 2015-6-8 09:14:06

STM32F2DAC输出音频有噪声

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


为什么是EEFOCUS小白 发表于 2015-6-8 15:50:54

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