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USB脉搏数据采集系统设计
摘要：由于USB具有热拔插、即插即用、速度快等特点，非常适合用于脉搏采集系统与主机的通信。针对把微弱的脉搏信号转换为电信号，并且进行相应处理，使系统能够实时的反应脉搏波形的问题，本系统设计严格遵循 USB2.0 协议，采用Cypress 公司生产的内核兼容型的高性能USB2.0单片机CY7C68013作为微控制器并结合高性能模数转换器AD9220采集信号。本文详细介绍了基于USB的脉搏数据采集系统的设计与实现，包括脉搏传感器的选用、ADC的选用、微控制器和 USB 接口芯片的选择及其应用以及电路的连接、固件程序、应用程序的具体设计等，对 USB2.0协议也进行了必要的描述。本系统中单片机系统主要完成信号采集、数据通信；微机完成数据接收、数据处理、显示等功能。软件上采用C语言编写固件程序以及VC++编写应用程序。
关键词：USB；AD9220；脉搏；固件
A Design of Pulse-Data-Acquisition System Based on USB
Abstract: Because of USB support hot plug function and on plug and play, and its desirable characteristics of fast speed, USB interfaces are quite suitably applied as communication interfaces between host computer and pulse-data-acquisition system. Aiming at transforming the faint pulse signal to electric signal and processing it and the system responding the real-time pulse image, this System based on USB technique strictly follows USB2.0 protocol. It use high performance USB2.0-microcomputer CY7C68013 of kernel compatible witch 8051 and the MCU is in combination with high performance ADC AD9220 to sample the signal. The article expounds on the design and realization of pulse-data-acquisition system based upon USB technique. It consists of the selection of pulse sensors, the ADC, the choice and utilizations of USB interface chip, connection of circuit, the detail of the device firmware, and applications, etc. A necessary description of USB2.0 protocol is also presented here. In this system, MCU focuses on sampling signals and data communication, and computer completes data acceptance, data processing, display and other functions. The firmware is designed by C51 language and the application adopts VC++ language.
Keywords: USB, AD9220, Pulse, Firmware
