基于MSP430F449的高精度数据采集系统

研究了以MSP430F449为核心的体积小、功耗低的高精度数据采集系统。该系统由硬件电路搭建和以控制软件编写来共同实现。小模拟信号经AD7714采集并由单片机控制转换成数字信号,并送往单片机进行数字滤波,进行变换后送LCD显示;同时经由UART模块送往PC机,进行其他处理。利用430C语言编写功能软件,包括A/D转换程序,系统主程序,以及与PC机通讯程序和滤波程序,单片机采用切比雪夫等波纹逼近法设计数字滤波器。充分利用MSP430F449和AD7714的特性,通过自主设计的硬件电路软件编程实现了高精度数据采集及处理。该系统具有体积小、功耗低,及可靠性高的特点。

High Precision Data Sampling System Based on MSP430F449

A high precision data sampling mini system based on MSP430F449 is researched.The system is established by hard ware constructing and soft ware programming.Small simulating signals are obtained via AD7714,transformed into digital signals by singlechip and sent to singlechip for filtering.Then the transformed signals are shown on LCD and sent to PC via UART for further work.Using 430C language programming softwares,such as A/D transform program,system main program,communicating program with PC,and filtering program,digital filters are designed by using of ripple approaching method on singlechip.Well utilizing the performances of MSP430F449 and AD7714,high precision data sampling system is realized through self-design hardware circuit and software programming.The proposed system possesses characteristics of small volume,low power consuming,and high reliability.