Type III Format Interface Descriptor

jimmyibongo · ‎2025-11-27

Hi everyone!

I figure out that Type III Format Interface Descriptor is generated automatically on STM32L476RG, and this use encoder format to transmit audio (Not PCM). Frame size vary an do mot match PCM packet sizes, meaning that transmitting raw PCM using Format Type III result as no audio output.

However, apparently those problems doesn't occur using Format |Type I Interface descriptor.

Any idea about how can to solve this problem?

Thanks.

mƎALLEm · ‎2025-12-01

Hello,

@jimmyibongo wrote:

I figure out that Type III Format Interface Descriptor is generated automatically on STM32L476RG

Generated by what?

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