Announcing Official Support for the Raspberry Pi Pico (RP2040)

mathijs March 1, 2022, 9:32pm #1

Today, we are excited to announce official support of Raspberry Pi's debut microcontroller, the RP2040, and the Raspberry Pi Pico development board.

This is a companion discussion topic for the original entry at https://www.edgeimpulse.com/blog/announcing-official-support-for-the-raspberry-pi-pico-rp2040

hxvris March 9, 2022, 10:13pm #2

I’m making an IoT device for audio scene recognition with the Pico, any help towards interfacing a microphone with pico on edge impulse?

shawn_edgeimpulse March 13, 2022, 5:12pm #3

The easiest method is to probably use an ADC microphone (https://how2electronics.com/how-to-use-adc-in-raspberry-pi-pico-adc-example-code/) and a hardware timer interrupt (https://raspberrypi.github.io/pico-sdk-doxygen/group__hardware__timer.html) that samples at your desired frequency (e.g. 16 kHz).

You can also likely find libraries to do I2S (https://github.com/raspberrypi/pico-extras/tree/master/src/rp2_common/pico_audio_i2s) or PDM (https://github.com/ArmDeveloperEcosystem/microphone-library-for-pico) using PIO on the RP2040.

Hope that helps!