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zephyr/samples/basic/blink_led
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Michael Scott d318da1db9 samples: basic: fix nRF52 PWM name in blink_led/fade_led samples 
commit ddf744deee ("drivers: pwm_nrfx: Use Device Tree label as
instance name") removed the config setting for PWM names and replaced
it with DT_NORDIC_NRF_PWM_PWM_*_LABEL.

This change is causing the blink_led and fade_led samples to break
when compiled for nRF52 boards.

Let's update the samples to use the DT setting.

Signed-off-by: Michael Scott <mike@foundries.io>
2019-02-27 12:22:42 -06:00
..
src samples: basic: fix nRF52 PWM name in blink_led/fade_led samples 2019-02-27 12:22:42 -06:00
CMakeLists.txt cmake: increase minimal required version to 3.13.1 2019-01-03 11:51:29 -05:00
prj.conf driver: pwm: use new logger 2018-10-08 17:49:12 -04:00
README.rst boards: nucleo_l496zg: Add pwm mapping and RTC 2019-01-23 09:18:35 -06:00
sample.yaml boards: nucleo_l496zg: Add pwm mapping and RTC 2019-01-23 09:18:35 -06:00

README.rst 

.. _blink-led-sample:

PWM: Blink LED
##############

Overview
********

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

The LED will start at a blinking frequency of 1 Hz. Every 4 seconds,
the blinking frequency will double. When the blinking frequency
reaches 64 Hz, the blinking frequency will be halved every 4 seconds
until the blinking frequency reaches 1 Hz. This completes a whole
blinking cycle. This faster-then-slower LED blinking cycle repeats forever.

Wiring
******

Nucleo_F401RE, Nucleo_L476RG, STM32F4_DISCOVERY, Nucleo_F302R8
==============================================================
Connect PWM2(PA0) to LED

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

Nucleo_L496ZG
=============
No special board setup is necessary because there are three on-board LEDs (red,
green, blue) connected to the Nucleo's PWM.

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

nrf52840_pca10056
=================
No special board setup is necessary because there is an on-board LED connected.

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.

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/blink_led
   :board: nrf52840_pca10056
   :goals: build flash
   :compact:

After flashing the image to the board, the user LED on the board should start to
blinking as discussed in overview