The Communication Protocol and Interface Design of Data Acquisition System Based on USB

摘要

This article analyses the data transmission protocol and corresponding circuit of USB interface. Based on USB interface, one data acquisition system is designed, taking EZ-AN2131QC of Cypress Company as USB interface chip, adopting FPGA (Field Programmable Gate Array) to realize the control of the serial logical signal. It also provides the writing method of system drivers and application programs.