基于UART的串口扩展设计

Serial Port Expansion Design Based on UART

随着嵌入式的广泛应用,越来越多的产品需要DSP与计算机之间进行协调工作。单片DSP芯片自身提供的FIFO不能满足大数据的通信,所以需要采用UART芯片扩展DSP串口。因此,介绍利用EXAR公司的异步通信收发器XR16C2852扩展串口,实现DSP与计算机之间的串口通信,详细说明了UART寄存器配置,同时提供了详细的硬件电路设计和软件编程设计。

With the extensive application of embedded technology,more and more products need the coordination between DSP and computer.FIFO provided by DSP chip cannot meet the communication demands of big data,so it is necessary to use UART chip to extend DSP serial port.This paper introduces the use of EXAR company’s asynchronous communication transceiver XR16C2852 to expand the serial port,realize the serial port communication between DSP and computer.It offers detailed description of the UART register configuration,detailed hardware circuit design and software programming design.