DMA data transfer 存储器直接存取数据传送 DMA Data Transfer 直接记忆器存取资料转移使用直接记忆器存取方法所进行的资料移转作业。 DMA Transfer Cycle 直接记忆器存取移转周期一般而言,所有的直接记忆器存取移转作业在一个记忆周期里面完成,起动和控制DMA移转作业信号的建立则在前一记忆周期里面发生。 data transfer...
The invention relates to a DMA (direct memory access)-based SPI (serial peripheral interface) data transmission method and a DMA-based SPI data transmission device. The method includes the steps: configuring a DMA controller for an SPI; and loading/downloading bootstrap program codes by means of...
transfer a current transfer block of compressed data into one or more storage blocks of the electronic memory; and a transfer block size estimator configured to select a transfer block size for the current transfer block based on previous DMA transfers of compressed data, the selected transfer ...
The CPU gets the DMA controller to begin a data transfer and associate a memory address to use. The DMA controller sets the destination addresses and read/write lines to the system memory. It then changes the internal memory address with each transferred byte of data until a full block of d...
The processor uses DMA to transfer data within memory spaces or between a memory space and a peripheral are introduced by the examples, and it is based on the embedded processor ADSP-BF561, newly published by ADI. Efficiently data transfers is carried out by DMA controller in fact, and the...
DMA permits the peripheral, such as a UART, to transfer data directly to or from memory without having each byte (or word) han... S Ball - 《Embedded Systems Programming》 被引量: 0发表: 2003年 A Processor-DMA-Based Memory Copy Hardware Accelerator This is accomplished by taking advantage...
based on the dma_map_ops implementation. Thedefaultallocatorfromarm_dma_ops gives you uncached, buffered memory. Itisexpected that the driver uses a barrier (whichisimplied by readl/writel but not __raw_readl/__raw_writel or readl_relaxed/writel_relaxed) ...
STM32 GPIO fast data transfer with DMA AN2548 -- 使用 STM32F101xx 和 STM32F103xx 的 DMA 控制器 DMA控制器 DMA是AMBA的先进高性能总线(AHB)上的设备,它有2个AHB端口: 一个是从端口,用于配置DMA,另一个是主端口,使得DMA可以在不同的从设备之间传输数据。
void DMA_Start_Transfer(uint32_t srcAddr, uint32_t desAddr, uint32_t size) { HAL_DMA_Start(&hdma_memtomem_dma1_channel1, srcAddr, desAddr, size); } 2. 确认数据已正确写入内存 2.1 使用DMA传输完成中断 为了确认数据已正确写入内存,可以使用DMA传输完成中断。当DMA传输完成时,中断服务函数会...
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