DMA data transmission system based on embedded motion control board card and transmission method thereof

Abstract

The invention discloses a DMA data transmission system based on an embedded motion control board card and a transmission method of the DMA data transmission system, wherein a self-researched embedded motion controller is adopted. The DMA data transmission system comprises an FPGA logical processing module, a DSP module and a motor control module, wherein the DMA function is embedded into the DSP module. According to the DMA data transmission method, by means of cooperative work of an upper computer, an FPGA and a DSP and reasonable distribution of a time period and a program segment, batch data interaction between the upper computer and the motion control board card and batch data interaction between internal modules of the motion control board card are achieved, and therefore accurate control over a servo motor by the motion controller is achieved.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a DMA data transmission system based on an embedded motion control board and a transmission method thereof. Background technique [0002] At present, most embedded motion control boards use the "bus protocol chip + FPGA + DSP" architecture to interact with the host computer for data interaction. The embedded motion control board uses a computer as the upper computer, and uses its advantages of strong computing and processing capabilities for path planning and trajectory point generation. The embedded motion control board is mainly responsible for real-time control of the actuator. At this time, optimizing the collaborative work between the host computer and the embedded motion control board and improving their respective operating efficiency are also important aspects that must be considered in high-performance CNC systems. [0003] The DMA transmission method widely appears in the ...

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Problems solved by technology

The Chinese patent application number is 201210049100.4, titled "A Design Method for Direct Memory Access Interface between DSP System and PC", which mentions the use of dual-port RAM as the data buffer of the upper computer and the lower computer. The advantage of this method is that the DSP uses two There will be no data conflict when each peripheral channel interacts with the host computer data and other peripheral data, but a dual-port RAM chip is required, which virtually increases the hardware cost.

However, this rate is less than half of the 133MB / sec transfer rate specified by the 32-bit PCI bus protocol.

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