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ArmDeveloperEcosystem / microphone-library-for-pico

Capture audio from a microphone on your Raspberry Pi Pico or any RP2040 based board. 🎤
Apache License 2.0
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microphone raspberry-pi-pico rp2040

readme

Microphone Library for Pico

Capture audio from a microphone on your Raspberry Pi Pico or any RP2040 based board. 🎤

Hardware

Default Pinout

Analog Microphone

Raspberry Pi Pico / RP2040 Analog Microphone
3.3V VCC
GND GND
GPIO 26 OUT

PDM Microphone

Raspberry Pi Pico / RP2040 PDM Microphone
3.3V VCC
GND GND
GND SEL
GPIO 2 DAT
GPIO 3 CLK

GPIO pins are configurable in examples or API.

Examples

See examples folder.

Cloning

git clone https://github.com/ArmDeveloperEcosystem/microphone-library-for-pico.git

Building

  1. Set up the Pico C/C++ SDK
  2. Set PICO_SDK_PATH 
    export PICO_SDK_PATH=/path/to/pico-sdk
  3. Create build dir, run cmake and make: 
    mkdir build
cd build
cmake .. -DPICO_BOARD=pico
make
  4. Copy example .uf2 to Pico when in BOOT mode.

License

Apache-2.0 License

Acknowledgements

This project was created on behalf of the Arm Software Developers team, follow them on Twitter: @ArmSoftwareDev and YouTube: Arm Software Developers for more resources!

The OpenPDM2PCM library is used to filter raw PDM data into PCM. The TinyUSB library is used in the usb_microphone example.

Disclaimer: This is not an official Arm product.