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CCS/TLV320AIC3253EVM-K: Mini Spectrum Analyzer app

Part Number: TLV320AIC3253EVM-K

Tool/software: Code Composer Studio


I am trying to evaluate a digital PDM microphone using TLV320AIC3253EVM-K. I have attached the microphone to J6 of the evaluation kit. I have removed jumper W15. All the other jumpers and switches are correct.
I tried using the Spectrum Analyzer miniDSP app of AIC3253EVM-K CS, but I am not getting any signal there. Then in the Typical Configurations I selected Digital Microphone Loopback and tried again, but still no signal in mini Spectrum Analyzer. Are there any other settings I need to change to view the spectrum ?
Also when I am clicking on 'Program Spectrum Analyzer into miniDSP' and 'Load Spectrum Analyzer' buttons, nothing is happening.
Please guide me how can I get the mini Spectrum Analyzer working.

Thanks and Best Regards,
Jagrit Arora

  • Hi, Jagrit,

    The app you are trying to evaluate is provided to demonstrate certain capabilities of the miniDSP of the AIC3253, is not meant to be used as standalone application for an end-system. I am not familiar with this app and don't have an EVM at hand to test it, but seems like it is set to be used with the codec's DAC only. If you overload the configuration with the Digital Mic loopback script, the miniDSP registers will be overwritten, so the spectrum analyzer app won't be functional.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer

  • Hi Diego,

    Thanks for this information.
    Other than this app and PurePath Studio, is there any other tool or software where I can see the output signal from the codec ?

    Best Regards,
    Jagrit Arora