用CPLD实现同步串口与异步串口的转换  

Interfacing from Synchronous to Asynchronous Serial Port with Complex Programmable Logic Device

作　　者：简思平[1] 周学才[2] 张基宏[2] 

机构地区：[1]深圳大学信息工程学院,广东深圳518060 [2]深圳信息职业技术学院,广东深圳518029

出　　处：《深圳信息职业技术学院学报》2004年第1期5-10,共6页Journal of Shenzhen Institute of Information Technology

摘　　要：常用串口通信标准种类繁多,系统设计者必须解决不同串行接口标准之间的转换问题。业界常用串口分为同步串口和异步串口。该文以常用DSP芯片的McBSP同步串口与UART异步串口之间的转换为例,探讨以CPLD来实现串行接口标准之间相互转换的低成本方案,并详细论述了该方案的软、硬件实现。该方案硬件连接简单,成本低廉,软件编程方便,可用于DSP与PC机间的串行通信等工程场合。There are several kinds of serial port interface standards in industry. The system designers usually encounter how to interface between the different serial port standards. The conventional serial ports are classified as Synchronous Serial Port and Asynchronous Serial Port. With low cost in mind, this paper presents a scheme for interfacing from Synchronous to Asynchronous Serial Port with Complex Programmable Logic Device (CPLD) on Digital Signal Processor (DSP) chip. This scheme features of low cost, simple connection in hardware and easy programming. It can be widely used in those cases which request for interfacing between DSP and PC.

关 键 词：CPLD 复杂可编程逻辑器件 异步串行接口 同步串行接口 数字信号处理器 标准串 DSP 

分 类 号：TP336[自动化与计算机技术—计算机系统结构] TM571.61[自动化与计算机技术—计算机科学与技术]