Extended module and extended method based on fpga multi-channel uart

Abstract

The invention provides an expansion module based on FPGA multipath UARTs. The expansion module comprises a power supply module, a signal processing module, a bus communication module, a level conversion module and a signal receiving and sending module. According to the expansion module based on the FPGA multipath UARTs, through integration of an FPGA chip and an RS485 chip, the problem of incapability of high-speed communication of a serial expansion module is solved, at the same time, such a plate member employs a standard 3U plug (165mm*100mm) in terms of structure and is thus suitable for a 3U cabinet, the versatility is quite high, and expansion of the multipath high-speed UARTs is realized.

Description

technical field [0001] The present invention relates to an expansion module based on FPGA multi-channel UART, in particular to a high-speed UART expansion module in power distribution automation, especially for use in MAX10 FPGA, bus, UART, RS485, and power systems. Background technique [0002] The full name of UART in English is "Universal Asynchronous Receiver / Transmitter", and the full name of UART in Chinese is Universal Asynchronous Receiver Transmitter, an asynchronous transceiver transmitter, which converts data from serial communication to parallel communication, and usually inherits the connection with the communication interface. Because the CPU uses parallel data internally, the data cannot be sent directly to the Modem, and must be converted asynchronously through serial-to-parallel conversion. Because the UART bus has the characteristics of strong anti-interference, wide working range, simple connection and high stability, it is widely used. in the field of dis...

AI Technical Summary

Problems solved by technology

In the power distribution automation system, a host device often needs to communicate with multiple slave devices. Since the CPU of the host device has fewer UART ports integrated, it is necessary to expand the UART port. The traditional method is to expand the multi-channel serial port by SPI. , due to the limitation of the SPI communication speed, the extended UART baud rate is relatively slow. Taking 1 SPI to expand 8 UARTs as an example, the baud rate of the UART is below 10K, and it is difficult to realize the high-speed communication of the UART.

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