Embedded Common

For STM32G4 microcontrollers.

• argb.rs: driver for WS2812 ARGB LEDs
• can.rs: CAN FD driver for canadensis (Cyphal)
• clock.rs: microsecond clock driver (consumes TIM2) for canadensis (Cyphal)
• debug.rs: ITM debug interface support
  • Enable with feature dprintln-enabled
• stepper_bus.rs, tmc_registers.rs: support for TMC5160 interface over SPI
  • Enable with feature stepper-board

tools/ also has some OpenOCD config files, a GDB script and an SVD file for the G474.