基于USB的多路数据读数接口的设计  

Design of USB-based Multi-channel Data Reading Interface

作　　者：连恒兴[1] 赵彩霞[1] 沈三民[1] 熊继军[1] 

机构地区：[1]中北大学电子测试技术国家重点实验室,太原030051

出　　处：《化工自动化及仪表》2011年第8期992-996,共5页Control and Instruments in Chemical Industry

基　　金：国家自然科学基金资助项目(60871041)

摘　　要：针对通常数据采集读数装置只适用于实时性要求不高场合的缺点,设计了一种实时性较好的多路数据读数接口。系统采用FT245BM实现与PC的硬件接口,FPGA作为中心控制模块,用IDT7203缓存所接收的异步串行数据;在此基础上制定上层通信协议,设计多路数据读数的调度算法,用VB编写上位机应用软件以配合硬件的数据读取。该设计可应用于各种对实时性要求较高的数据采集读数场合。Considering the shortcoming of data acquisition and reading device which only applies to the occasions with less real-timing demand, the interface circuit boasting of good real-timing in communications with multiple channels was designed; and basing on the FT245BM interfacing with PC hardware, and the central control module FPGA and the IDT7203 caching asynchronous serial data, the communication protocol at application layer and the scheduling algorithm were developed to communicate with multiple channels;and the su- pervisory computer with VB was realized and the multiple channels communication with FT245BM was achieved. This design can be applied to data actquisitions askingfor higher real-timing.

关 键 词：FT245BM FIFO 有限状态机 调度算法 

分 类 号：N274.2[自然科学总论]