tinyusb.git/src/class/midi/midi2_device.h, branch xfer_isr_fallback

midi2: convert to raw Tx FIFO for better segmentation handling, add count to packet api

2026-05-18T21:07:49Z

Signed-off-by: HiFiPhile

midi2: drain pattern for RX FIFO

2026-05-17T22:56:04Z

Default RX/TX buffers to EPSIZE for both device and host. Document drain-in-loop on ump_read; example device callback drains until empty.

midi2: scale device buffers with EPSIZE

2026-05-17T16:07:21Z

Match midi2_host pattern. Literal 256 underran HS endpoints (512B).

midi2: per-interface weak callbacks for UMP Stream config

2026-05-17T15:19:45Z

Lets each instance return different NUM_GROUPS, NUM_FUNCTION_BLOCKS, EP_NAME and PRODUCT_ID. Defaults fall back to the macros.

midi2: peek 4 bytes for MT, restore 256 buffers

2026-05-17T14:31:12Z

MT is in byte 3 of the UMP word in LE memory, not byte 0. Buffers at mps blocked RX xfer re-arm on partial packets.

midi2: move config to class header

2026-05-17T12:11:53Z

Signed-off-by: HiFiPhile

midi2: reject UMP read/write API on alt setting 0

2026-05-16T15:59:03Z

Alt 0 carries USB-MIDI 1.0 32-bit Event Packets, not UMP words; calling the UMP API there would misinterpret the stream. Expose MIDI_PROTOCOL_MIDI1 and MIDI_PROTOCOL_MIDI2 in the public header so applications can branch on the negotiated protocol. Ref #3571

feat: add MIDI 2.0 Device class driver (USB-MIDI 2.0)

2026-05-12T14:07:44Z

Add native USB-MIDI 2.0 Device class driver to TinyUSB. Implements the USB-MIDI 2.0 specification with both Alt Setting 0 (MIDI 1.0 fallback) and Alt Setting 1 (UMP native) descriptor support. Driver features: - UMP (Universal MIDI Packet) read/write with atomic message framing - Protocol negotiation: Endpoint Discovery, Config Request/Notify, Function Block Discovery (embedded in driver) - Group Terminal Block descriptor via GET_DESCRIPTOR - Alt Setting switch handler with endpoint re-arm - Static allocation, no dynamic memory, ISR-safe Build system: - Register midi2d_* in usbd.c driver table - Add TUD_MIDI2_DESCRIPTOR macros to usbd.h - Add config defaults (CFG_TUD_MIDI2_*) to tusb_option.h - Add midi2_ump_word_count() to midi.h (shared by Device and Host) - Add midi2_device.c/h to family.cmake and CMakeLists.txt - Add midi2_device.h include to tusb.h All changes guarded by #if CFG_TUD_MIDI2 (default 0). Zero impact on existing drivers and examples. Tested: Raspberry Pi Pico (RP2040), Linux ALSA, Windows MIDI Services