Dear all, I am using qdma driver software and firmwares with two different Versal kits, VPK120 and VCK190 on different PCs.Both of the boards showed the same problem in the streaming mode readout (dma-from-device).I have re
(sc->dev, bf->bf_buf_addr, common->rx_bufsize, DMA_FROM_DEVICE); return false; } and it's worth noting how that first DMA sync: dma_sync_single_for_cpu(..DMA_FROM_DEVICE); is there to make sure the CPU can read the DMA buffer (possibly by copying it from the bounce buffer ...
b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma, dest_idx * sizeof(*dest_desc), DMA_BIDIRECTIONAL); - - dma_sync_single_for_device(bp->sdev->dma_dev, dest_map->mapping, - RX_PKT_BUF_SZ, - DMA_FROM_DEVICE); } static int b44_rx(struct b44 *bp, int budget) di...
Have a great day , Yes DMA_MR register fields address hold enable (SAHE/DAHE) and transfer size (SAHTS/DAHTS) are right for task like yours. For
When the data bus is cut off from the CPU () and the transmission ready signal (TXRDY) is activated, the DMA control circuit () reads bits of data at once according to the lead address of the destined area for storage in the DRAM () and the address width that are set by the CPU...
detected. A transfer request can be triggered from software, from an external trigger source (peripheral) or from an event. There are dedicated source trigger selections for each DMA channel. The available trigger sources may vary from one device to anoth 当DMA调动请求被查出时, DMA调动可能只...
Single dma transfers from device drivers to network adapters.Methods and arrangements of data communications are discussed. Embodiments include transformations, code, state machines or other logic to provide data communications. An embodiment may involve receiving from a protocol stack a request for a ...
We are using the MKE15Z256xxx7 controller for transfer and receive the data through SPI with DMA for Pmod-sf3 flash( Customized SPI driver) . The communication is fine, Read/Write too is also fine, however the data is read from index 4 instead of 0th index, ie first we...
common type of DMA found in systems based on PCI Express. BMD implementations reside within the Endpoint device and are called Bus Masters because they initiate the movement of data to (Memory Writes) and from (Memory Reads) system memory. BMD实施显然是在系统发现的DMA的最共同的类型根据PCI明确...
司机:dma接触:从设备树增加初始化 2013-05-23 12:23:18 回答:匿名司机: dma接触: 从设备树增加初始化 2013-05-23 12:24:58 回答:匿名驱动程序: dma 连续: 从设备树中添加初始化 2013-05-23 12:26:38 回答:匿名驱动程序:DMA-连续:添加初始化设备树 2013-05-23 12:28:18 回答:匿名mmM...