DMA_CYCLIC使用 DMA传输类型: enumdma_transaction_type { DMA_MEMCPY,//内存拷贝DMA_XOR,//异或操作DMA_PQ,//乘方操作DMA_XOR_VAL,//异或值操作DMA_PQ_VAL,//乘方值操作DMA_INTERRUPT,//DMA中断?DMA_SG,//散射-聚集(Scatter-Gather)传输DMA_PRIVATE,//私有的DMA传输DMA_ASYNC_TX,//异步传输DMA_SLAVE,/...
I ran into the same problem answered by Alexander in your linked post. In addition, I found there is a 255 buffer descriptor limit defined in xilinx_axidma.c that will return NULL if you exceed it. Therefore, in: dmaengine_prep_dma_cyclic( struct dma_chan *chan, dma_...
In the link http://www.wiki.xilinx.com/AXI\+DMA\+Standalone\+Driver, Xilinx add support for cyclic DMA mode , then I downloaded the xaxidma_example_sgcyclic_intr.c from github( I'm using vivado 2017.3), however, it did't work well(I don't know why it is). As a newbie in FP...
/* DMAEND */ off+=_emit_END(dry_run,&buf[off]); }else{ /* Error if xfer length is not aligned at burst size */ if(x->bytes% (BRST_SIZE(pxs->ccr)*BRST_LEN(pxs->ccr))) return-EINVAL; off+=_setup_xfer_cyclic(pl330,dry_run,&buf[off], ...
--- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -935,8 +935,12 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( else d->ccr |= CCR_SYNC_ELEMENT; - if (dir == DMA_DEV_TO_MEM) + if (dir == DMA_DEV_TO_MEM) { ...
方法 NewMasterDmaChannel 會為主要裝置建立 DMA 通道物件。 若要為次級裝置建立 DMA 通道物件,請改為呼叫 IPortWaveCyclic::NewAlleDmaChannel 方法。 如需主要和次級裝置的詳細資訊,請參閱 IDmaChannel 和IDmaChannel一文。 DmaChannel、OuterUnknown 和ResourceList 參數會遵循 COM 物件的參考計數慣...
方法 NewSlaveDmaChannel 为从属设备创建 DMA 通道对象。 若要为主设备创建 DMA 通道对象,请改为调用 IPortWaveCyclic::NewMasterDmaChannel 方法。 Microsoft Windows 驱动程序工具包 (WDK) 中的 sb16 示例音频驱动程序是次级设备的 WaveCyclic 微型端口驱动程序的一个示例。 有关主设备和从属设备的详细...
32 +2692,19 @@ static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic( size_t period_len, enum dma_transfer_direction direction, unsigned long flags, void *context) { - struct dma_pl330_desc *desc; + struct dma_pl330_desc *desc = NULL, *first = NULL; struct dma_pl330_...
US6209046 Jul 24, 1998 Mar 27, 2001 International Business Machines Corporation DMA transfer from a storage unit to a host using at least two transfer rates and cyclic error detectionUS6209046 1998年7月24日 2001年3月27日 International Business Machines Corporation DMA transfer from a storage ...
Direct Repair of the Exocyclic DMA Adduct 1,N~6-Ethenoadenine by the DMA Repair AlkB Proteins 来自 掌桥科研 喜欢 0 阅读量: 28 作者:Y Mishina,CG Yang,C He 摘要: DNA is challenged by endogenous or environmental alkylation agents that modify heterocyclic bases and backbones.Many of these ...