musb(Mentor USB) Registers and embassy-usb-driver , usb-device Implementation.

The MUSBMHDRC (musb) is a USB 2.0 Multi-Point, Dual-Role Controller designed by Mentor Graphics Corp. It is widely used by various manufacturers in microcontrollers and SoCs, including companies like TI, MediaTek, Puya, Allwinner, and others.

These built-in profiles are used via Cargo features (see below), with only one selectable:

• builtin-py32f07x (py32m070, py32f071, py32f072)

• builtin-py32f403

• builtin-sf32lb52x

• builtin-std-8bep-2048 (8 bidirectional endpoints, 2048K FIFO size in total, without instance)

Add musb to your Cargo.toml:

[dependencies]
musb = { version = "0.3.0", features = ["builtin-std-8bep-2048"] }

You can use the std profile by enabling the builtin-std-xxx feature. This profile doesn't include a base_address, so it won't generate a UsbInstance (explained in Porting Guide).

If your chip is not included, you'll need to create a new profile. Refer to the Porting Guide for more details.

embassy-usb-driver-impl: Enables embassy-usb-driver implementation.

usb-device-impl: Enables usb-device implementation.

Note: Only one of these two implementations can be enabled at a time.

prebuild(on by default): Uses pre-generated PAC (Peripheral Access Crate).

builtin-xxxx : Uses builtin profile.

defmt, log: Enables debug logging.

hal example: py32-hal/src/usb.rs , sifli-rs/sifli-hal/src/usb.rs

embassy-usb: py32-hal/examples/py32f072 , sifli-rs/examples/sf32lb52x

usb-device: py32-hal/examples/usbd-f072

Refer to the Porting Guide for more details.

You can also refer to this blog (in Chinese): PY32的musb(Mentor USB)的Rust支持 - Decaday

If you have any questions or uncertainties, feel free to create an Issue or start a Discussion.

• Support Dynamic FIFO Size
• Support dual packet buffer
• HS mode
• Other Chips
• Host mode / OTG (wait for a rust usb host stack)

This project is under Apache License, Version 2.0 (LICENSE or https://www.apache.org/licenses/LICENSE-2.0).

This repo references the MUSB port implementation in CherryUSB for certain aspects.