基于MSP430的输入输出模块设计与实现

摘要

Monitoring system has been widely used in marine engineering.The data acquisition and output control are the core functions of the monitoring system.A digital I/O module based on MSP430F149 is designed to meet the requirements of monitoring system.The module transfers the data through RS485,and controls three analog inputs,one analog output,eight digital inputs,eight digital outputs and one PWM output through serial commands.The whole developing process of the module is introduced,including hardware circuit diagram,software flow diagrams,prototype of module software program and computer program based on Visual C ++.Experiments show that the whole module is stable and easy to operate,and can be well applied to various monitoring system designs.%监控系统的应用范围已扩展至海洋工程装备领域,数据采集与输出控制是监控系统的核心功能.针对监控系统需求,设计出一种基于MSP430F149单片机,通过RS485总线传递数据控制模拟量输入输出、数字量输入输出及PWM输出的功能模块,完成了硬件电路设计与焊制,下位机软件编程及基于Vis-ual C++的上位机程序设计.系统试验表明整个模块功能稳定、操作简单,实现8个数字输出、8个数字输入、1个模拟输出、3个模拟输入及1个PWM输出,能够很好地应用于各种监控系统设计.