zephyr

History

Gaute Gamnes 596a11c6bd drivers: pwm: nrf: Modify fade_led PWM example, use new HW drv 1. Modified fade_led PWM example to include nRF HW PWM option. 2. Added fade_led nrf52_pca10040.overlay in order to enable PWM node and choose output PWM GPIO for channel 0. Channel 1 GPIO enable but not used in sample src. Signed-off-by: Gaute Gamnes <gaute.gamnes@nordicsemi.no>		2018-12-11 15:18:14 +01:00
..
src	drivers: pwm: nrf: Modify fade_led PWM example, use new HW drv	2018-12-11 15:18:14 +01:00
CMakeLists.txt	samples, tests: Use semi-accurate project names	2018-10-27 21:31:25 -04:00
README.rst	…
nrf52_pca10040.overlay	drivers: pwm: nrf: Modify fade_led PWM example, use new HW drv	2018-12-11 15:18:14 +01:00
prj.conf	…
sample.yaml	…

README.rst

.. _fade-led-sample:

PWM: Fade LED
#############

Overview
********

This is a sample app which fades a LED using PWM.

The LED will start from dark and increases its
brightness gradually for 10 seconds. Then, the
brightness reduces gradually for 10 seconds and
finally the LED becomes dark again. The LED will
repeat this cycle for ever.

Wiring
******

Arduino 101 and Quark D2000 CRB
===============================
You will need to connect the LED to ground and PWM0 via
the shield. You may need a current limiting resistor. See
your LED datasheet.

Nucleo_F401RE and Nucleo_L476RG
===============================
Connect PWM2(PA0) to LED

Nucleo_F103RB
=============
Connect PWM1(PA8) to LED

Hexiwear K64
============
No special board setup is necessary because there is an on-board RGB LED
connected to the K64 PWM.

Building and Running
********************

This sample can be built for multiple boards, in this example we will build it
for the arduino_101 board:

.. zephyr-app-commands::
   :zephyr-app: samples/basic/fade_led
   :board: arduino_101
   :goals: build flash
   :compact: