Data transmission system based on DMA

The invention relates to the technical field of data transmission, in particular to a DMA-based data transmission system, which comprises a software module and a hardware module, and is characterized in that the software module comprises N first storage areas and R second storage areas; the hardware module comprises a DMA engine, N first transmission channels and R second transmission channels; the DMA engine is respectively connected with the software module, the N first transmission channels and the R second transmission channels; the software module is used for storing data Dn in the HMn; the DMA engine is used for acquiring data Dn and caching the Dn into PFn of Pn; the Pn is used for transmitting the Dn in the PFn to the first target equipment; the Qr is used for receiving data Er in the second target equipment and caching the Er to the QFr of the Qr; the DMA engine is used for transmitting the Er to the software module; and the software module is used for storing the Er into the CMr. According to the in