To perform the 4 point DFT process from a given discrete sequence in TMS320F2812 KIT.
The sequence of N complex numbers x0, ..., xN−1 is transformed into another sequence of N complex numbers according to the DFT formula
It transforms one function into another, which is called the frequency domain representation, or simply the DFT, of the original function (which is often a function in the time domain).
The DFT requires an input function that is discrete. Such inputs are often created by sampling a continuous function, such as a person's voice. The discrete input function must also have a limited (finite) duration, such as one period of a periodic sequence or a windowed segment of a longer sequence. Unlike the discrete time Fourier transform (DTFT), the DFT only evaluates enough frequency components to reconstruct the finite segment that was analyzed. The inverse DFT cannot reproduce the entire time domain, unless the input happens to be periodic. Therefore it is often said that the DFT is a transform for Fourier analysis of finite-domain discrete-time functions.
Note: Once you install the Code Composer Studio v 3.3 software, the two icons will display in desktop
1. Open Setup Code Composer Studio v3.3.
2. In System Configuration, select the board then → Remove all → yes.
Note: The above two steps only for first time to setup the processor in CCS.
3. Open Code Composer Studio v3.3.
4. Project → New.
5. File → New → Source file.
6. File → Save.
Paste the following two cmd files in our project folder.
8. Project → Add files to project.,
9. Project → Build Option.
In compiler tab, select Preprocessor
In linker tab, select libraries
In linker tab, select Basic
10. Project → Build (or) Rebuild all.
11. Connections for TMS320F2812 kit
12. Debug → connect.
13. File → Load Program → Browse and select the projectname.out file → open
14. Debug → Go main.
15. View → memory
16. Debug → Run.
17. Debug → Halt
18. See the output at following location, View → memory
Enter An Address:0x3F9110 → Enter.
19. View → memory
Enter An Address:0x3F9120 → Enter.
Thus, the 4 point DFT of given discrete sequence has performed and the result is stored at memory location(0x3F9110 & 0x3F9120).
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