usb_audio_class_example

Source path: example\cherryusb\device\audio_v1_mic

Supported Platforms

sf32lb52-lcd_n16r8

Overview

This example demonstrates the USB microphone recording functionality based on the USB audio class, the UAC protocol used is 1.0, including:

The host calls the recording function to record audio through the USB microphone.
PCM data is uploaded to the host via USB.

Usage Instructions

Hardware Requirements

Before running this example, you need to prepare:

A development board supported by this example (Supported Platforms).
A USB-A to Type-C data cable with data transfer capability.
A host device that supports USB.

menuconfig Configuration

Enable AUDIO CODEC and AUDIO PROC:
Enable AUDIO (AUDIO):
Enable AUDIO MANAGER (AUDIO_USING_MANAGER):
Modify the default AUDIO RX Path:

Compilation and Flashing

Switch to the example project directory and run the scons command to compile:

scons –board=sf32lb52-lcd_n16r8 -j32

Switch to the example project/build_xx directory and run uart_download.bat, then follow the prompts to select the port for downloading:

./uart_download.bat

Uart Download

please input the serial port num:5

For detailed steps on compilation and downloading, please refer to the relevant introduction in Quick Start.

Expected Results

After starting the example: The host connects to the board via the data cable, and a new microphone device (SiFli UAC DEMO) will appear in the audio input and output section of the host’s device manager. When the host opens the recording device, it can select the microphone device for normal recording.

Troubleshooting

Reference Documents

Change Log

Version	Date	Release Notes
0.0.1	08/2025	Initial version