用VHDL设计通用异步接收/发送器

Use VHDL to Design Universal Asynchronous Receiver & Transmitter

分析了通用异步接收/发送器(UART)的功能特点,采用VHDL作为硬件功能描述方式,并结合现场可编程逻辑门阵列(FPGA),实现了一个可编程的通用异步接收/发送器UART模块,它完全符合标准的UART通信协议,可以用来连接电脑、微控制器、微处理器、DSP芯片等器件,实现系统的高速串行通信,从而增强系统的通信接口控制能力。

This paper describes the function and characteristic of Universal Asynchronous Receiver & Transmitter (UART) , uses VHDL language to describe the hardware' s function, and implements a model of programmable UART by using the Field Programmable Gate Array ( FPGA). The module thoroughly accords with the communication protocol of standard UART, can be used to connect the device, such as computer, microcontroller, microprocessor, DSP chip, and so on. It can implement high-speed communication between the systems, and increase the control ability of communication interface for the system.