Talking about high-quality USB-C implementations, there’s a product that has multiple selling points designed around USB-C, and is arguably a shining example of how to do USB-C right. It’s the ...
QP/C is a state machine framework and lightweight RTOS for embedded CPUs, MCUs, and DSPs. Enables direct coding of UML state machines in C without big tools. Ported to ARM7, ARM9, ARM Cortex-M3, ...