Research On The Data Acquisition System Base-on DSP

Data acquisition and processing has been a hotspot and difficulty in the production of research and practice areas.With the using of high-powered microprocessor and advance of user's desire, the research and application of data acquisition and processing system is developing at home and abroad. Now, the research and application which use a digital signal processor as a data acquisition system's CPU is getting more importance in the industry.This paper designs a data acquisition program based on DSP, CPLD and USB for a small instantaneous frequency measurement receiver output frequency of the sampling data coding will be proposed. And this data acquisition system has been carried out. This system has these characteristic: programming with flexible configuration is simple, easy to upgrade and strengthen the advantages of scalability.This paper first introduces DSP technology, researches DSP software design technology, chooses software design based on DSP/BIOS. The paper analyses major performance indicators and the basic structure of the data acquisition and processing systems. Then based on the Instantaneous Frequency Measurement Receivers,as well as to the mode of sampling data formats,the author offers to a project based on high-performance Digital Signal Processor, First-in-first-out memory,Complex Programmable Logic Device and Universal Serial Bus interface. This paper accomplishes the hardware system's design and focus on the DSP hardware circuit design, accomplishes the software system's design and focus on the DSP data acquisition software design , and researches in detail the applications and superiority of DSP/BIOS in the design of DSP software. This system achieves collecting and transmitting of the output frequency receiver code data and achieves analysising the sampling data on the PC to achieve the desired results.