Design and Implementation of Multi-interface Protocol Converter Based on ZYNQ
To meet the dramatic increase in the number of various types of drive devices in the car and the demand for high reliability of the in-vehicle network,a multi-interface protocol converter was designed based on ZYNQ.A star connection was used between the converter and the underlying devices,and the Ethernet and CAN communication interface circuits were constructed with the ZYNQ chip as the core.The Ethernet and TTCAN soft cores were designed based on the FPGA using the Verilog HDL language,and the data conversion program between Ethernet and multiple TTCAN was designed based on the ARM.Data interac-tions between the ARM and the FPGA were realized based on the BRAM transmission mechanism.Experiments show that the pro-tocol converter can recognize the protocol conversion between Ethernet and multiple TTCAN,the time-triggered function of TTCAN was realized,and real-time communication was improved.The use of a star TTCAN connection instead of bus architecture improves communication reliability,which is of significance for the development of an in-vehicle network.
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