Abstract
A multi-channel Direct Memory Access (DMA) transmission mechanism based on embedded multi-axis motion system is proposed in this paper. The motion control system comprises of a computer and a motion controller based on DSP and FPGA. DSP is vital important in transferring data sets among servo driver modules, FPGA module and itself. The PCI protocol module and DMA buffer pool are integrated in FPGA to set up DMA channels between the computer and the motion controller, which simplifies the address mapping of local bus and increases the efficiency of data transmission. Experiments are conducted on the self-designed motion control system and the results demonstrate that the DMA transmission mechanism has distinct advantages, such as simple hardware structure, excellent low transmission fluctuation and high hard real-time performance.
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