An FPGA-based serial port switching device, method and storage medium

Abstract

The invention discloses an FPGA-based serial port switching device, method and storage medium, including: a first serial port channel, an SPI interface and a JTAG interface for connecting with a main control MCU; A second serial port channel, and the FPGA serial port switching module, the FPGA serial port switching module is connected with the first serial port channel, SPI interface, JTAG interface and the second serial port channel, the FPGA serial port switching module can receive the logic switching sent by the main control MCU through the SPI interface Command to switch the serial port connection mode according to the logic switching command to realize the connection between the main control MCU and the target peripheral module; the FPGA serial port switching module can receive the serial port connection setting update command sent by the main control MCU through the JTAG interface to increase according to the serial port connection setting update command New serial connection mode. The device realizes the switching of the serial port channel through the FPGA, which can realize the nanosecond delay of port switching. At the same time, when there is a new serial port connection requirement, the serial port connection mode in the FPGA serial port switching module can be updated.

Description

technical field [0001] The invention relates to the technical field of serial port switching, in particular to an FPGA-based serial port switching device, method and storage medium. Background technique [0002] At present, in the surveying and mapping industry and the driving test and driving training industry, the whole instrument and equipment usually contain multiple modules. In the process of multi-module stacking integration, communication between modules and between modules and the main control CPU is required. , the most common way of communication is RS232 serial port. ARM embedded processors (such as STM32) have a limited number of serial port peripherals, which cannot cover the number of serial ports required by the design of the peripherals; at the same time, in the era of rapid development of technology updates, each module module exists The need for software upgrades and updates, and with the miniaturization of highly integrated devices, there are fewer and fe...

AI Technical Summary

Problems solved by technology

ARM embedded processors (such as STM32) have a limited number of serial port peripherals, which cannot cover the number of serial ports required by the design of the peripherals; at the same time, in the era of rapid development of technology updates, each module module exists The need for software upgrades and updates, and with the miniaturization of highly integrated devices, there are fewer and fewer external interfaces for products. When encountering a bug in the corresponding peripheral firmware or a function update that needs to be upgraded, it is often necessary to disassemble the device. This has caused a lot of trouble for product upgrades and maintenance

[0003] To solve this problem in traditional industries, relays or analog switches are generally used to switch serial ports. Due to their large size, relays cannot be used on platforms with many interfaces. The frequency is too slow; and the use of analog switches cannot meet the needs of platforms with high communication speed requirements due to the large turn-on and turn-off delays.

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