Based On The Design Of The The USB Interface LabVIEW Data Acquisition And Transmission System

As a kind of new bus standard, Universal Serial Bus (USB) has been widely applied in the field of the data acquisition because of its easy interface,high transmission rate,supporting hot plug and play.Combining the advantages of the DSP and USB technology, this article designs a suit of the multi-channel data acquisition system based on the USB bus and digital signal processor, which has the advantages of the lower cost, higher integration and so on.Depending on the advanced high-performance digital signal processor of Texas Instruments corporation and USB interface chip of Cypress,this article develops a kind of data acquisition and transmission system which has the function of signal conditioning,analog to digital signal conversion,data storage and other functions.It has a variety of auxiliary circuit to meet the requirement of increasingly complex signal acquisition and processing and the real-time data can be transmitted to the PC or storaged in U disk through the USB interface. This article mainly designs DSP control module, programmable signal conditioning module, high-speed ADC module, embedded USB host interface module, USB slave interface module and 4-channel high-speed DAC module. basing on the hardware platformt, we finally carry out the function of data acquisition, processing, display, storage by using LabVIEW.