Blinky is a simple application which blinks an LED forever.
The source code shows how to configure GPIO pins as outputs, then turn them on
The board must have an LED connected via a GPIO pin. These are called “User
LEDs” on many of Zephyr’s Supported Boards. The LED must be configured using the
led0 Devicetree Guide alias in the BOARD.dts file.
You will see this error if you try to build Blinky for an unsupported board:
Unsupported board: led0 devicetree alias is not defined
Building and Running
Build and flash Blinky as follows, changing
reel_board for your board:
west build -b reel_board samples/basic/blinky
After flashing, the LED starts to blink. Blinky does not print to the console.