DMA_PeripheralBurst = DMA_PeripheralBurst_Single;//外设突发模式选择,可选单次模式、 4 节拍的增量突发模式、 8 节拍的增量突发模式或 16 节拍的增量突发模式。 DMA_Init(DMA2_Stream2, &DMA_InitStructure); /* DMA Stream enable */ DMA_Cmd(DMA2_Stream2, ENABLE); } 除了配置DMA外设外,我们还需要...
#define DMA_PeripheralBurst_Single ((uint32_t)0x00000000) #define DMA_PeripheralBurst_INC4 ((uint32_t)0x00200000) #define DMA_PeripheralBurst_INC8 ((uint32_t)0x00400000) #define DMA_PeripheralBurst_INC16 ((uint32_t)0x00600000) #define IS_DMA_PERIPHERAL_BURST(BURST) (((BURST) == DMA_...
DMA_MemoryInc = DMA_MemoryInc_Enable; // DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; // DMA_Mode_Circular DMA_Mode_Normal DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t) (&(USART3->DR)) ; DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; DMA_InitStructure.DMA_...
#define DMA_MemoryBurst_INC16 ((uint32_t)0x01800000) 1. 2. 3. 4. DMA_PeripheralBurst: 配置外设突发传输配置。跟前面一个参数DMA_MemoryBurst 作用类似,只不过一个针对的是存储器。取值有: #define DMA_PeripheralBurst_Single ((uint32_t)0x00000000) #define DMA_PeripheralBurst_INC4 ((uint32_t)...
MemoryBurst = DMA_MemoryBurst_INC8，DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_INC...
(15) DMA_PeripheralBurst:外设突发模式选择,可选单次模式、4节拍的增量突发模式、8节拍的增量突发模式或16节拍的增量突发模式。该值在标准库中可供选择的参数值如下: DMA_PeripheralBurst_Single //单次 DMA_PeripheralBurst_INC4 //4节拍 DMA_PeripheralBurst_INC8 //8节拍 DMA_PeripheralBurst_INC16 //16节拍...
每次DMA请求就传输4/8/16个(取决于MBURST[1:0])字节/半字/字(取决于MSIZE)数据突发传输与FIFO密切相关,突发传输需要结合FIFO使用,具体要求FIFO阈值一定要是内存突发传输数据量的整数倍。FIFO阈值选择和存储器突发大小必须配合使用,具体参考表 215。表 215 FIFO阈值配置M...
SINGLE表示每个DMA请求进行1次,INC4表示每个DMA请求进行4次DMA传输。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #define DMA_PBURST_SINGLE ((uint32_t)0x00000000U) #define DMA_PBURST_INC4 ((uint32_t)DMA_SxCR_PBURST_0) #define DMA_PBURST_INC8 ((uint32_t)DMA_SxCR_PBURST_1) #...
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;DMA_InitStructure.DMA_Peripheral...
DMA_PeripheralBurst = DMA_PeripheralBurst_Single;//存储器突发单次传输 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;//外设数据长度:8位 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//外设非增量模式 DMA_InitStructure.DMA_Priority = DMA_Priority_Low; //低...