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display peak value in the fft code for userexperience demo code

pratap yenubari
Expert 2305 points
Other Parts Discussed in Thread: MSP430F5438, TIMAC

Hi,

I have gone through the user experience demo source code for msp430f5438 experimenter board.

In that i have run the FFT code and the waveform is coming on the LCD monitor of the board for audio input.

I want to display the values of the peak in the wave form for FFT. when ever the peak changes the value should be changed .

how to go for it.

  • 0
    TI__Genius 16740 points

    Hi Pratap,

    The FFT results are calculated and displayed in FFTrecorder() inside FFT.c.

    The routine calculates the value and stores them in the array FFT_Image, then uses halLcdImage to display the results in the LCD. 

    The parameters for halLcdImage are: pointer to the array, number of rows, number of columns, start x-coordinate, start y-coordinate.

    So, you can basically change the contents of this array as needed, or use your own array; and then display it in the LCD using this function.

    I'm not sure if this helps, but I hope it points you in the right direction.

    Regards,

    Luis R

  • 0 in reply to Luis RC
    Expert 2305 points

    hi luis,

    i am able to get wave peak as per your suggestions.

    i have i more query.i want to transfer the fft code files to the TIMAC code already given so that i can pass the incoming values at the receiver end as input to the fft file instead of audio input in sample fft code.

    i have added the code to TIMAC with necessary changes .

    currently i am taking audio as input .

    but i am not able to get any waveform.

    i am not able to understand what is happening.

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