sekigon-gonnoc/Pico-PIO-USB

Health v2 · maintenance only

Adoption not part of the score

1744 stars · 218 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A C library that implements USB full-speed/low-speed host and device protocols using the PIO (Programmable I/O) blocks of the Raspberry Pi Pico RP2040/RP2350 microcontrollers. It lets developers add extra USB ports to the chip beyond its native USB controller, with support for hubs, multi-port, and HID devices.

Use cases

• add an extra USB host port to an RP2040 microcontroller
• read keyboard and mouse input on a Pico without native USB host support
• build a split keyboard that connects two halves via USB
• implement a USB HID device on a second port of the Pico
• forward HID reports from a host port to a CDC device port
• connect USB hubs and multiple devices to a single RP2040

When to choose

• you need more USB ports than the RP2040's single native USB controller provides
• you are building USB host peripherals like keyboards, mice, or HID readers on Pico hardware
• you want a lightweight PIO-based USB stack that integrates with TinyUSB
• you are developing QMK or other embedded firmware for split keyboards

When to avoid

• you need high-speed (HS) USB, which is not supported
• you are not targeting RP2040/RP2350 hardware
• you need a fully certified or production-hardened USB stack with minimal resource usage constraints
• you require USB device functionality without access to an external 1.5kohm pull-up resistor

Facets

library · maturity active

embedded sdk embedded-systems hardware developer-tools embedded cpp c rp2040 rp2350 pio usb-host usb-device raspberry-pi-pico tinyusb firmware driver

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markdown · JSON · MCP: product_card(name="sekigon-gonnoc/Pico-PIO-USB")