基于FPGA的UART扩展总线设计和应用

The Design and Implementation of UART Expansion Bus base on FPGA

现在嵌入式系统的功能越来越集合化,需要控制大量外设。外设模块普遍采用UART作为通信接口,但是通常处理器都会自带一个UART串口。实际应用中一个串口往往不够用,需要对系统进行扩展。本文所介绍的就是以FPGA为实现方式的UART扩展总线设备的逻辑设计以及相关的驱动程序的设计。

Now embedded system need to control the large number of peripherals for its more multipurpose function. Peripherals module commonly used UART as a communication interface, but a processor usually comes with one UART serial port .Only one UART is not enough in actual application so we need to expand the system. This paper introduced the logic design and driver design of UART expansion bus achieved with FPGA.