2017-04-05 03:20:40 +08:00
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.. _fade-led-sample:
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2017-01-09 22:12:15 +08:00
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PWM: Fade LED
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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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2017-01-09 22:12:15 +08:00
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2016-10-19 05:39:53 +08:00
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This is a sample app which fades a LED using PWM.
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The LED will start from dark and increases its
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brightness gradually for 10 seconds. Then, the
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brightness reduces gradually for 10 seconds and
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finally the LED becomes dark again. The LED will
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repeat this cycle for ever.
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2017-01-09 22:12:15 +08:00
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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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2017-01-09 22:12:15 +08:00
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2016-10-19 05:39:53 +08:00
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Arduino 101 and Quark D2000 CRB
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2017-01-21 07:58:05 +08:00
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===============================
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2016-10-19 05:39:53 +08:00
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You will need to connect the LED to ground and PWM0 via
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the shield. You may need a current limiting resistor. See
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your LED datasheet.
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2016-11-29 16:12:51 +08:00
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Nucleo_F401RE and Nucleo_L476RG
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2017-01-21 07:58:05 +08:00
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===============================
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2016-11-29 16:12:51 +08:00
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Connect PWM2(PA0) to LED
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Nucleo_F103RB
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2017-01-21 07:58:05 +08:00
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=============
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2016-11-29 16:12:51 +08:00
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Connect PWM1(PA8) to LED
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2017-01-09 22:12:15 +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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2017-01-09 22:12:15 +08:00
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This sample can be built for multiple boards, in this example we will build it
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for the arduino_101 board:
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.. code-block:: console
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$ cd samples/basic/fade_led
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$ make BOARD=arduino_101
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$ make BOARD=arduino_101 flash
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