A General Asynchronous Serial Port Based on FPGA and Its Response Method

Abstract

The invention discloses an FPGA-based universal asynchronous serial port and response method thereof. The asynchronous serial port comprises a register module, a control module, a reception module, atransmission module, a reception memory and a transmission memory. The response method comprises the following steps of: after the universal asynchronous serial port detects a signal, executing a start condition; carrying out data analysis and restoration according to characteristics of a physical layer protocol configured by an interface so as to obtain reception interpretation data; detecting anapplication layer protocol configured by the interface; matching the data with the application layer protocol byte by byte; if all the pieces of data are successfully matched, returning response datato complete asynchronous serial port communication; if the matching fails, recording error information; and no matter whether the matching succeeds or not, storing received asynchronous serial port data for analysis. According to the FPGA-based universal asynchronous serial port and the response method, uniform description of asynchronous serial port communication is realized, the defects that the traditional asynchronous serial port data processing method is bad in universality, long in research period and high in cost are overcome, and the advantages of being standard, strong in reusability, short in research period and low in cost are provided.

Description

technical field [0001] The invention relates to an FPGA-based universal asynchronous serial port and a response method thereof, belonging to the technical field of serial port communication. Background technique [0002] Embedded systems have a specific hardware operating environment, so debugging and testing in the software development process are closely related to hardware timing, and need to rely on a semi-physical simulation platform. The traditional semi-physical simulation platform is customized and developed for the real target system and its application scenarios, and is a special test equipment with strong pertinence. However, in the face of the generally shortened software development cycle and the increasing number of agile development software, the traditional semi-physical simulation platform has gradually exposed the following problems: [0003] (1) The hardware design scheme of the traditional semi-physical simulation platform has poor versatility. It invol...

AI Technical Summary

Problems solved by technology

[0003] (1) The hardware design scheme of the traditional semi-physical simulation platform has poor versatility

It involves different developers, adopts different technical solutions, and the functions and interface standards of various hardware boards are also different, making it difficult to reuse simulation platforms for different projects

[0004] (2) The traditional semi-physical simulation platform has a long development cycle and high cost

The simulation platform of each new research project needs to go through the four processes of "design-production-debugging-use", which is difficult to meet the general shortening of software development cycle and the increasing application requirements of agile development software

[0005] (3) The traditional semi-physical simulation platform has poor maintainability

Under normal circumstances, the on-orbit operation period of space-borne embedded software is 5 to 8 years, and some are even longer; during this period, the flow of platform developers will increase the risk of inadequate management of historical development data, resulting in new development. It is difficult for personnel to quickly and effectively maintain the simulation platform

[0006] (4) It is difficult for the traditional semi-physical simulation platform to realize the generalization of supporting simulation software

There are differences in the hardware and onboard FPGA logic of different project simulation platforms, which directly affect the generalization of supporting simulation software

Images