Audio Spectrogram Example for Pico

Example project showcasing how to use a Raspberry Pi Pico, Adafruit's PDM MEMS Microphone Breakout, and Adafruit's 2.0" 320x240 Color IPS TFT Display with microSD Card Breakout to "See sound in real-time".

This project also leverages Arm's CMSIS-DSP library for optimized on-board digital signaling processing.

Hardware

• Raspberry Pi Pico
• Adafruit's PDM MEMS Microphone Breakout
• Adafruit's 2.0" 320x240 Color IPS TFT Display with microSD Card Breakout

Default Pinout

+---------+-------------------+     +---------+-------------------+
| PDM Mic | Raspberry Pi Pico |     | ST7789  | Raspberry Pi Pico |
|---------+-------------------|     |---------+-------------------|
|    3V   |        3V3        |     |   VIN   |        3V3        |
|---------+-------------------|     |---------+-------------------|
|    GND  |        GND        |     |   GND   |        GND        |
|---------+-------------------|     |---------+-------------------|
|    SEL  |        GND        |     |   SCK   |      GPIO18       |
|---------+-------------------|     |---------+-------------------|
|    DAT  |       GPIO2       |     |   MOSI  |      GPIO19       |
|---------+-------------------|     |---------+-------------------|
|    CLK  |       GPIO3       |     |   CS    |      GPIO17       |
+---------+-------------------+     |---------+-------------------|
                                    |   RST   |      GPIO21       |
                                    |---------+-------------------|
                                    |   D/C   |      GPIO20       |
                                    +---------+-------------------+

Cloning

git clone --recurse-submodules https://github.com/ArmDeveloperEcosystem/audio-spectrogram-example-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. Change directories

cd audio-spectrogram-example-for-pico

4. Create build dir, run cmake and make:

mkdir build
cd build
cmake .. -DPICO_BOARD=pico
make -j

4. Copy audio_spectrogram.uf2 to Pico when in BOOT mode.

License

Apache-2.0 License

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Disclaimer: This is not an official Arm product.