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USB Audio Speaker demo i.MXRT1050

Question asked by psdev on Oct 10, 2018
Latest reply on Feb 12, 2019 by Kevin Frank
Branched to a new discussion



I'm trying out the USB Audio Speaker demo on the i.MX RT1050 development board. The project compiles and executes on the board, but the sound doesn't get through to the audio jack. Has anyone managed to get this demo working?


Some details:

Board evkbimrxt1050

SDK_2.x_EVKB-IMXRT1050 version 2.4.2

project dev_audio_speaker_bm

IDE MCUXpresso

Tool chain gcc


The demo is supposed to implement a USB Audio Class device. This shows up when I run the demo and plug in the USB cable. I can select it for audio output and I see that sound data are sent over the USB link. However, the callback functions for processing the audio data are never called, so the sound data never makes it to the codec.