USB MIDI Host adapter

Acts as host for a single USB MIDI device, converting signals to high speed serial MIDI.

Under development.

Notes

Uses async-modified versions of the usb-host and atsamd-usb-host crates.

The runtime lib provides a custom Rust async implementation compatible with RTIC, based on the woke crate.

The sync-thumbv6m lib provides original and mutated data structures adapted to the Cortex-M0 lack of atomic operations.

Connect to Trinket M0 board using underside SWD pads

For the probe I use a bluepill

Then I flash it with DAP42 firmware

Very simple wiring turns it into an SWD probe

STLinkV2-compatible probes also work... until they don't (why?)

If not already installed, run

cargo install probe-run

And then

cargo build
probe-run --chip ATSAMD21E17A target/thumbv6m-none-eabi/debug/usb-serial

If it doesn't work the first time... retry more.

Note: chip type for SAM D21 on Trinket M0 should be ATSAMD21E18A but actually needs to be ATSAMD21E17A. See probe-rs/probe-rs#507

Instead of probe-rs, Use OpenOCD to flash the app and run as GDB server and RTT/defmt server

See the watch_rtt.sh script or just use CLion run configs from .run dir

Licensed under the terms of the Apache 2.0 and MIT license.