boards/others/stm32_min_dev/board.yml

board:
  name: stm32_min_dev
  full_name: STM32 Minimum Development Board
  vendor: others
  revision:
    format: custom
    default: "blue"
    revisions:
      - name: "blue"
      - name: "black"
  socs:
    - name: stm32f103xb