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Original question:

How to initialize the Digital(MEMS) Microphone configuration

TLV320AIC3262: Digital Mic config script

Arthur Thompson27
Expert 1800 points
Part Number: TLV320AIC3262


Hi, I want to connect a digital mic (PDM output) to the TLV320AIC3262EVM.  I can't quite get it figured out.  I see clock and data on the mic pins, but the track I'm recording in Audacity is just completely silent.  The microphone is hooked up to GPIO2 (clock) and GPI2 (data). 

I have gotten recordings working using an analog mic on IN1L, so my interface from the EVM to my PC isn't completely broken.

Could TI provide a script that demonstrates digital mic input?

Also, I'm kind of new to the CodecControl application.  Is there a way to save and recall the settings I've been adjusting in the GUI?

Thanks,

Arthur

  • 0
    TI__Mastermind 22950 points

    Hello Arthur,

    Unfortunately, our codec expert is out until Monday and we do not provide any "ready to go" scripts or code. What we can do is have a look at your register configurations provide some feedback.

    With that being said, if you provide your register configs or info how you are configuring the device in the GUI, we will gladly take a look.

    Regards,

    Aaron

  • 0 in reply to Aaron Estrada
    Expert 1800 points

    Hello,

    I think the issue was actually on Windows side.  I went back to try my analog mic setup again and it didn't work - Windows had turned the sound from the USB-AudioEVM down to zero.

    Can you answer the more general question of whether there's a way to export the settings that I set in the GUI and recall them later?

    Thanks,

    Arthur

  • 0 in reply to Arthur Thompson27
    TI__Expert 6440 points

    Hi Arthur,

    The application does not provide a way to save the GUI state. However, there is a register inspector than allows you to export the register settings.

    In addition, the GUI also provides an option to record the register settings corresponding to the GUI changes.

    This can be accessed from the View-->Command panel by enabling the 'Record" checkbox.

    The recorded data can be saved as a .cfg (configuration) file using the 'Save' button.

    The .cfg file can then be downloaded to the device using the same 'Command' interface by selecting Open-->Run.

    Best Regards.