| .. _blinky-sample: |
| |
| Blinky Application |
| ################## |
| |
| Overview |
| ******** |
| |
| The Blinky example shows how to configure GPIO pins as outputs which can also be |
| used to drive LEDs on the hardware usually delivered as "User LEDs" on many of |
| the supported boards in Zephyr. |
| |
| Requirements |
| ************ |
| |
| The demo assumes that an LED is connected to one of GPIO lines. The |
| sample code is configured to work on boards that have defined the led0 |
| alias in their board device tree description file. Doing so will generate |
| these variables: |
| |
| - DT_ALIAS_LED0_GPIOS_CONTROLLER |
| - DT_ALIAS_LED0_GPIOS_PIN |
| |
| |
| Building and Running |
| ******************** |
| |
| This samples does not output anything to the console. It can be built and |
| flashed to a board as follows: |
| |
| .. zephyr-app-commands:: |
| :zephyr-app: samples/basic/blinky |
| :board: reel_board |
| :goals: build flash |
| :compact: |
| |
| After flashing the image to the board, the user LED on the board should start to |
| blink. |
