Asynchronous serial data exchange system and method based on FPGA

Abstract

The invention provides an asynchronous serial data exchange system based on an FPGA. The asynchronous serial data exchange system comprises the FPGA, a Schmidt inverter, a differential bus transceiverand a serial peripheral interface, wherein the output end Y1 of the Schmidt inverter is connected with the input end Sin of the FPGA; the output end Y0 of the Schmidt inverter is connected with the input end A1; the output end En of the FPGA is respectively connected with the input end DE and the input end DE _ N of the differential bus transceiver; the output end Sout of the FPGA is connected with the input end D of the differential bus transceiver; the output end G of the differential bus transceiver is connected with the input end A0 of the Schmidt inverter; the VCC end of the differentialbus transceiver is connected with a first input pin of the serial peripheral interface through a first fuse; the output end A of the differential bus transceiver is connected with the second input pin of the serial peripheral interface, the input end B of the differential bus retractor is connected with the third output pin of the serial peripheral interface, and the GND end of the differential bus transceiver is connected with the fourth pin of the serial peripheral interface.

Description

technical field [0001] The invention relates to the technical field of electrical signal transmission, in particular to an FPGA-based asynchronous serial data exchange system and method. Background technique [0002] Asynchronous serial communication requires fewer transmission lines, high reliability, and long transmission distance, and is widely used in data exchange between micro-control systems and peripherals. With the rapid development of FPGA, FPGA plays an increasingly important role in asynchronous serial communication. The FPGA-based asynchronous serial communication system can effectively simplify circuit design, reduce the size of printed boards, improve reliability, and have greater flexibility in design. Asynchronous serial communication needs to handle the data sending and receiving mechanism, bus direction adjustment, data frame verification, etc., and has strict timing control requirements. Therefore, how to better handle the above timing mechanism is to im...

AI Technical Summary

Problems solved by technology

At present, there are many solutions for asynchronous serial communication, but there are more or less problems such as unclear sending and receiving mechanism flow, high bit error rate, and imperfect handling of fault events.

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