Development Of Data Acquisition System Based On DSP

Contrapose traditional data acquisition system which has a separate pattern of data acquisition and data processing,namely the mode of data acquisition in hardware and data processing in computer,this paper describes an development of data acquisition and processing system based on DSP and USB,thus reducing burden of computer and more suited to industrial applications.This paper has a deep research of the data acquisition system based on DSP and USB,successful develops the entire system,mainly includes analog-digital conversion circuits,DSP peripheral circuits,USB circuits,AD and USB data buffer circuits.Realization of the control for system and reading data from AD buffer in DSP;Realization of communication between DSP and computer through USB;Ralization of control for system and data display in computer.This subject complets all parts of design of software in this hardware system,including data acquisition and transmission procedures in DSP,receiving command and control hardware procedures in DSP,sending and receiving data procedures in bulk transfers mode in USB,sending data procedures in synchronization mode in USB.This subject complets the design of visual interface in computer,including hardware control procedures,wave display procedures,producing pseudo-random sequence and sending synchronization data procedures.This subject complets debugging all of the software and the hardware,the system works well after debugging,sample waveform acquired from hardware are presented finally,then this subject designs an error detected procedures using pseudo-random sequence theory,verifies transmission capability of the USB interface in this hardware.