Measuring harmonics from voltage or current source using DSP

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acibrix

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Am using a eZdsp™ F2812 for TMS320F2812 DSP (C28xx) from spectrum digital. I want to be able to read a voltage or current source from the JART port , sample it into an array of 128 points, and then take the Discrete Fourier Transform (DFT) of it to get harmonics. I have already written the DFT algorithm and seems to be working fine, when I use points from a sinwave.

Now just need help in reading the source from JART port. Anyone can help me?
 

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