| 摘要 |
An embodiment of the present invention relates to the field of data transmission, in particular to a data transmission method and device, for solving the problems of low data transmission efficiency and poor DMA performance in the method of arbitrating each DMA channel in a round-robin mode and transmitting data according to the arbitration result. The method provided in the embodiment of the present invention comprises: for each direct memory access (DMA) channel, determining the arbitration unit corresponding to the channel among a plurality of arbitration units according to the transmission performance corresponding to the data in the channel; and when the data in the channels corresponding to at least two arbitration units needs to be transmitted, transmitting the data according to the priorities of the at least two arbitration units. The embodiment of the present invention first transmits the data corresponding to the channel having good transmission performance corresponding to the data in the channel, and keeps a bus unblocked, thus improving data transmission efficiency and improving DMA performance. |
