This mode is called Memory to Memory mode. If the MEM2MEM bit in the DMA_CCRx register is set, then the channel initiates transfers as soon as it is enabled by software by setting the Enable bit (EN) in the DMA_CCRx register." //STM32 TIM2 DMA Mem-to-Mem pacing VLDiscovery - ...
RCC_AHB1PeriphClockCmd(DEBUG_ADC_DMA_CLK, ENABLE); /** ADC 数据寄存器地址*/ DMA_InitStructure.DMA_PeripheralBaseAddr = DEBUG_ADC_DR_ADDR; DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&adcConvertedValue; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory; /** buffer size 和需扫描...
DMA_MEM_TO_MEM,memory到memory的传输; DMA_MEM_TO_DEV,memory到设备的传输; DMA_DEV_TO_MEM,设备到memory的传输; DMA_DEV_TO_DEV,设备到设备的传输。 */ enumdma_transfer_direction direction; /* 传输方向是dev2mem或者dev2dev时,读取数据的位置(通常是固定的FIFO地址)。 对mem2dev类型的channel,不需...
③FIFO常用于DMA控制器和Memories之间的缓冲。Memory-to-Memory，是必须使用FIFO模式的。 ④FIFO模式和Dir...
DMA_DEV_TO_MEM,设备到memory的传输; DMA_DEV_TO_DEV,设备到设备的传输。 */ enum dma_transfer_direction direction; /* 传输方向是dev2mem或者dev2dev时,读取数据的位置(通常是固定的FIFO地址)。 对mem2dev类型的channel,不需配置该参数(每次传输的时候会指定); ...
DMA_InitStructure.DMA_Memory0BaseAddr = _BufAddr; DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral; DMA_InitStructure.DMA_BufferSize = _Count; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; DMA_InitStructure.DMA_Periphe...
4.DMA双缓冲模式仅在外设与存储器间进行,不支持memoryto Memory间的传输。 基于DMA双缓冲模式的的特点,不难理解在应用中必须开辟两个存储区以及存放两个存储区首地址的存储寄存器,DMA_SxM0AR和DMA_SxM1AR。 DMA_SxM0AR:指向存储区0,单缓冲模式下默认使用该寄存器做存储区指针。
hdma_memtomem_dma2_stream0.Init.Channel=DMA_CHANNEL_0; hdma_memtomem_dma2_stream0.Init.Direction=DMA_MEMORY_TO_MEMORY; hdma_memtomem_dma2_stream0.Init.PeriphInc=DMA_PINC_ENABLE; hdma_memtomem_dma2_stream0.Init.MemInc=DMA_MINC_ENABLE; ...
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;DMA_InitStructure.DMA_PeripheralDataSize = ...
< memory to memory transfer */ #define DMA_REQUEST_GENERATOR0 1U /*!< DMAMUX1 request generator 0 */ #define DMA_REQUEST_GENERATOR1 2U /*!< DMAMUX1 request generator 1 */ #define DMA_REQUEST_GENERATOR2 3U /*!< DMAMUX1 request generator 2 */...