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Using the CC85xxDK Pure Path Configurator Customization

Bernard Franzi
Prodigy 230 points

Hello,

I am using a CC85xxDK-Headset to prépare new product with this chipset.

I use the Audio Device Customization of the Pure Path Wirelew Configurator to add filtering to the signal.

I have tried to add a 4 biquad stereo filter in the DAC part of the receiver. The système told me that the I2C configuration was too large and i have had to reduce to only 2 biquad stereo filter and  biquad mono filter in order not to be too large.

Can you tell me the real limitation of the I2C configuration of the Pure Path configurator.

Thank you for your help

Best regards

  • 0
    TI__Mastermind 21125 points

    Hi Bernard, 

    The answer to your question can be found here:
    http://e2e.ti.com/support/low_power_rf/f/382/t/159440.aspx

    That being said, there is a trick to extend this (please read the above link first).

    Here is a trick to get some extra I2S command. Please note by using this trick you will get more room for more commands, but we DO NOT guaranty that the same amount of space will be available for a similar application in future FW revisions.

    Run "regedit" and locate
    HKEY_CURRENT_USER\Software\Texas Instruments\PurePath Wireless Configurator

    Add DWORD value
    MaxCfgDescExtension = 4096

    By applying trick, all available code can be used for audio device configurations. How much in total depends on the application and settings in the configurator, but for some configuration the available space is almost doubled. You will just have to test to see if this is enough.

    Once again, this trick is available in FW1.3.0 and might be removed or the 1500 bytes limit will be re-inforced in future FW releases. 
    Hope this allows for a sufficient amount of biquads.

    Best regards,
    Kjetil