Design & Applicational Research On High Speed Signal Acquisition And Processing System

High speed signal acquisition and processing is absolutely necessary to any digital signal processing system, which the technique of digital signal processing gradually becomes the main part in the field of signal processing recently. Nowadays, DSP takes an increasing role in the digital signal processing on account of its particular superiorities, while USB2.0 applies widely to the interface between peripheral equipments and PC owing to the characteristics such as high speed data transfer, extraordinary convenience and low cost. Consequently, a system of multi-channel high speed signal acquisition and processing is presented through the study of ADSP21160 and USB2.0 controlling chip. Research work and achievements that had done in the thesis are summarized as follows.1. The scheme of each module included in the system such as signal acquisition part, data processing part, computer interface part and logical control part is separately designed according to the functional request. ADSP21160, EPM7128AE, ISP1581 are finally choosed to realize those modules of above.2. Hardware design of the signal acquisition and processing system is carried through based on the scheme analyse. Primary contents that had been researched are as follows: signal regulation circuit, ADC circuit, DAC circuit, external memories of DSP, Watchdog circuit, JTAG circuit, interface circuit based on the chip of ISP1581 and power layer.3. Software design of CPLD and DSP is separately put forward, which can make the multi-channel high speed data acquisition and feedback come true. In the part of CPLD program, the VHDL language is utilized to realize the logical control toward AD7655, AD5545, external memories and ISP1581. While the software procedure of DSP is verified by compiling the assemble language in the VisualDSP++ simulation environment. Besides, the firmware of USB is also discussed in the thesis.4. Research work is explored in the application of this system. Simultaneously, the software procedure together with its simulation results in the MAXPLUSII are proposed according to the working principle of this applied system.5. A series of hardware and software debugging is processed in term of modularized idea. It is tested that the performance of the system is stable , which can exactly meet the request of its fuctional extension.