2017-04-05 03:20:40 +08:00
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.. _blinky-sample:
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2016-10-02 11:28:54 +08:00
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Blinky Application
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##################
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Overview
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2017-01-21 07:58:05 +08:00
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********
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2016-10-02 11:28:54 +08:00
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The Blinky example shows how to configure GPIO pins as outputs which can also be
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used to drive LEDs on the hardware usually delivered as "User LEDs" on many of
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the supported boards in Zephyr.
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2017-01-07 07:49:24 +08:00
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Requirements
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2017-01-21 07:58:05 +08:00
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************
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2017-01-07 07:49:24 +08:00
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The demo assumes that an LED is connected to one of GPIO lines. The
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2018-12-21 18:08:06 +08:00
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sample code is configured to work on boards that have defined the led0
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2019-10-08 01:37:09 +08:00
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alias in their board devicetree description file. Doing so will generate
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2018-12-21 18:08:06 +08:00
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these variables:
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2017-01-07 07:49:24 +08:00
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2019-06-22 23:59:19 +08:00
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- DT_ALIAS_LED0_GPIOS_CONTROLLER
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- DT_ALIAS_LED0_GPIOS_PIN
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2017-01-07 07:49:24 +08:00
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Building and Running
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2017-01-21 07:58:05 +08:00
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********************
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2017-01-07 07:49:24 +08:00
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This samples does not output anything to the console. It can be built and
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flashed to a board as follows:
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2017-11-12 17:12:44 +08:00
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.. zephyr-app-commands::
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:zephyr-app: samples/basic/blinky
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2019-06-13 20:31:56 +08:00
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:board: reel_board
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2017-11-12 17:12:44 +08:00
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:goals: build flash
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:compact:
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2017-01-07 07:49:24 +08:00
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After flashing the image to the board, the user LED on the board should start to
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blink.
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