Tms320f2812-based Data Acquisition And Fft Study

Data acquisition and processing systems are used widely in many fields. The mainwork of the system is transforming the voltage parameter of outside analog signals todigital data based on A/D convertor, include saving the result for after analyze anddispose. Technique of data acquisition is widely applied in industry control system. Inproduction engineering, applying data acquisition device can implementacquisition. surveillance and records of processing parameters of field production, andoffer information and means for improving quality of products and reducing cost.Discrete Fourier Transform is separating discrete signal into amplitude value andfrequency value, it's one of the main tools in digital signal processing field. But becauseof its large computational complexity, its application is limited. Afterward with theappearance of Fast Fourier Transform, DFT is used widely in practical application.Because most chips of DSP can complete a multiplication and an addition in aninstruction period, and they can provide the specialized instruction of FFT, make theFFT algorithm on the chip of DSP the speed of the realization more fast.The text carries on the 32 bits digital signal processing processor TMS320F2812 ofTexa Instrument Company to the core of signal acquisition and processing. The dataacquisition is completed by the 12 bits A/D convertor of TMS320F2812. The data byacquisition is restored in ROM of the processor. Digital processing is mainly to analyzethe Fast Fourier Transform.This paper describes carefully on DSP theory, F2812 processor's resources ofTMS320 series and the software development tools, Code Composer Studio(CCS).Theauthor designs and composes the program of data acquisition model, analyzes the of dataacquisition theory. The author also analyzes carefully the implement of Fast FourierTransform, the most classical application on the digital signal processing, based on thepoint-bit DSP processor.