Data receiving/sending method and device
A data receiving method and a receiving chain technology, which are applied in the field of data receiving/sending methods of direct memory access in devices, can solve the problems of loss of data in header identification transmission, difficulty in taking into account system burden and transmission efficiency at the same time in fixed-length transmission, and the like. Data loss, taking into account system load and transmission efficiency, and reducing the effect of load
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[0046] When using the fixed-length transmission method for DMA operation, if the length of the data frame is set shorter and the length of the transmitted data is greater than the length of the data frame, the more times the DMA transmission is required, the receiver DMA is completed during the data transmission process. The higher the number of interrupts, the more times the processor responds to interrupts, and the greater the burden on the processor. Conversely, if the length of the data frame is set longer and the length of the transmitted data is smaller than the length of the data frame, more invalid data needs to be filled, and the transmission efficiency of valid data will be lower. Therefore, when the DMA operation is performed in a fixed-length transmission mode, it is difficult to balance system burden and transmission efficiency at the same time.
[0047] When the DMA operation is performed by using the header identification transmission method, because only the le...
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