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Author Topic: BT81x disabling Audio PWM  (Read 10102 times)

JuergenD

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BT81x disabling Audio PWM
« on: June 15, 2019, 03:05:54 PM »
Hello,
we would like to disable the Audio PWM pin of the BT81x completely. Normally this pin gives us a PWM Signal after initialization of the BT, which we would like to eliminate. We would like to see here a static Signal. Is there a possibility to disable Audio PWM? we saw that playing a 'mute' Sound should do the Job, but in the documentation I saw Sound '62', somewere else '60', somewhere else '0'.
What is correct? is this the only possibility playing 'mute' or is there another possibility to disable this e.g by configuring the GPIO?

Thanks
« Last Edit: June 15, 2019, 05:01:31 PM by JuergenD »
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BRT Community

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Re: BT81x disabling Audio PWM
« Reply #1 on: June 17, 2019, 02:22:50 PM »
Hello,

Section 4.7.1 of the datasheet covers the sound synthasizer:
https://brtchip.com/wp-content/uploads/Support/Documentation/Datasheets/ICs/EVE/DS_BT81X.pdf

The 'Silence' sound is 00h, the REG_SOUND register can be set to this value and should achieve what you're looking for.

Best Regards,
BRT Community
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