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plot the result of FFT example

Wendy.Z
Intellectual 525 points

hello,

I wanna try to plot the graph of the FFT example(which is given under the dsplib folder), but somehow it didnt work. 

the description of the txt is writen as 

Steps:
1) Load the Project using CCS V4.
2) Re-build the project.
3) Run the generated outfile.
4) Plot the output samples.
5) Compare it with reference output (refOutput.jpg)

I'm now using CCSv5.03, and I chose the "single time" of "graph" under the "Tools" bar while my board is running in CCS Debug. No matter what I set for my input, there's always only y=0(extends to positive x-axis). I'm wondering why is it? is there any setting that I have to be awared?

Looking for your responses and advices.

Best Regards,

Wendy 

  • 0
    TI__Guru*** 130875 points

    Hi Wendy,

    if you are using ccs v5.0.x these are old unsupported beta releases.  I would strongly recommend using the latest version (v5.4).   It is very likely the issue you are seeing is already fixed.

    Best Regards,
    Lisa 

  • 0 in reply to Lisa TI
    Intellectual 525 points

    Hi Lisa,

    Thank you very much, I've tried already in my linux system with a different CCS version. and it works fine :) 

    Cheers,

    Wendy

  • 0 in reply to Wendy.Z
    TI__Guru*** 130875 points

    Hi Wendy,

    ok, great.  Glad to hear you have the plotting working and thanks for the update.

    All the best with development.

    Best Regards,

    Lisa

  • 0 in reply to Lisa TI
    Intellectual 525 points

    Hi Lisa,

    I run the example code today for a short test, but the figure it plot seems wrong. its more like a noice. with the  high magnitude.

    My steps are just simply opened the single time when the program is running, and I changed the data type from 32 to 16 unsigned bit based on default. I'm wondering that Is there any special setting I have to configure? and I've noticed when the cores are suspended, there's also a note shows SW breakpoint, I didnt set any breakpoint mannually, that's reallz wierd... If its possible, could you please give me some advices.

    btw, my CCS version is 5.4 under linux.

    Thanks in advance.

    Best regards,

    Wendy