Host: MIDI Receive

A USB host example that receives MIDI from a connected USB-MIDI device and prints the incoming bytes over the debug UART.

What it does

Enumerates USB-MIDI devices (CFG_TUH_MIDI) and, on mount, prints the interface index, device address, and the number of RX/TX cables.
On each received MIDI packet, reads the stream and prints the cable number followed by the raw MIDI bytes as hex.
Blinks the board LED once per second.

Requirements

The board must support USB host mode (provide VBUS to the connected device); some boards need an external USB-A port / host adapter.

Configuration

Notable tusb_config.h settings:

#define CFG_TUH_ENABLED             1
#define CFG_TUH_HUB                 1
#define CFG_TUH_DEVICE_MAX          (3*CFG_TUH_HUB + 1)
#define CFG_TUH_MIDI                CFG_TUH_DEVICE_MAX

Building

CMake:

bash

mkdir build && cd build
cmake -DBOARD=raspberry_pi_pico ..
cmake --build .

Make:

bash

make BOARD=raspberry_pi_pico all

How to use

Plug a USB-MIDI device (keyboard, controller, or interface) into the board's USB host port. On attach the debug UART prints the mount info; then playing notes or moving controls prints lines like Cable 0 rx: 90 3C 7F with the raw MIDI bytes.