2017-04-05 03:20:40 +08:00
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.. _disco-sample:
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2017-01-06 23:26:27 +08:00
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Disco demo
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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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2017-01-06 23:26:27 +08:00
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A simple 'disco' demo. The demo assumes that 2 LEDs are connected to
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GPIO outputs of the MCU/board.
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Wiring
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2017-01-21 07:58:05 +08:00
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******
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2017-01-06 23:26:27 +08:00
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2018-12-03 08:55:16 +08:00
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This sample should work on board with multiple built-in LEDs without any
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changes, otherwise, the code may need some changes before running on various
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board: set PORT, LED0 and LED1 according to the board's GPIO configuration.
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2017-01-06 23:26:27 +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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2017-01-06 23:26:27 +08:00
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2017-01-07 07:49:24 +08:00
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After startup, the program looks up a predefined GPIO device defined by 'PORT',
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2018-12-03 08:55:16 +08:00
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and configures pins 'LED0' and 'LED1' in output mode. During each iteration of
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2017-01-07 07:49:24 +08:00
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the main loop, the state of GPIO lines will be changed so that one of the lines
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is in high state, while the other is in low, thus switching the LEDs on and off
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in an alternating pattern.
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2017-01-06 23:26:27 +08:00
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2017-01-07 07:49:24 +08:00
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This project does not output to the serial console, but instead causes two LEDs
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connected to the GPIO device to blink in an alternating pattern.
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2019-03-09 06:21:37 +08:00
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The sample can be found here: :zephyr_file:`samples/basic/disco`.
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