DMA Stream与Peripheral Address Register之间的关系密切。每个DMA Stream都可以配置一个或多个外设地址寄存器,用于指定该流传输数据的源地址和目标地址。 源地址寄存器:指定DMA传输的数据来源地址,通常是外设的数据寄存器。 目标地址寄存器:指定DMA传输的数据目标地址,通常是内存中的某个位置。 通过配置这些地址寄存器,DMA...
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对于STM32F4来讲,每个DMAstream都有4个字(word)的FIFO可用。它用来暂存来自DMA源端的数据。1个字(word)=32bit=4byte threshold:,每当FIFO里存放的数据达到设定的阈值后,数据就会被移走。阈值可以设置为从1个字到4个字的深度。 Burst size:DMA的节拍。即几个数据【4/8 ...
*p++ =0;// Off - finishing delay// Enable DMAuint8_tCountToTx = p - TxPwrBuf;dmaStreamSetTransactionSize(IR_TX_DMA_STREAM, CountToTx); dmaStreamEnable(IR_TX_DMA_STREAM);// Start master timerModulator.GenerateUpdateEvt();// Generate update: clear counter and request DMAModulator.Enable(...
dmaStreamDisable(uart->dmarx); dmaStreamDisable(uart->dmatx); iomcu.process_io_packet(); num_total_rx++; num_dma_complete_rx = num_total_rx - num_idle_rx; dmaStreamSetMemory0(uart->dmarx, &iomcu.rx_io_packet); dmaStreamSetTransactionSize(uart->dmarx,sizeof(iomcu.rx_io_packet)...
StreamBaseAddress DMA 数据流基地址是 datastream数据库 概述 数据流不同于数据库,有几个特点:数据流的实时性,导致其需要被立即处理,否则会永远消失。同时一般数据量太大太快,动态存储无法存储全部数据。所以在处理数据流的时候,一般会采用两种算法:1、利用采样和过滤的思想对流实时处理,去除不必要的元素。2、存储...
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使用 DMA2_Stream5，通道0可以，但是使用DMA2_Stream4，通道1 却不行，查看资料也没有发现还有其他的...
I would like to know if it is possible to set up a stream-to-memory transfer for an SG-DMA controller, set the 'bytes_to_transfer' value in a descriptor to a non-zero value, and have the descriptor complete when either the specified number of bytes is transferred or an EO...
I use the streaming test dma_streaming_test.sh to transmit small bytes, however it failed, the result is as follows. /dev/xdma0_h2c_0, write 0x88 @ 0x0 failed -1. write file: Unknown error 512 /dev/xdma0_c2h_0, read 0x80 @ 0x0 failed -1...