zephyr

History

Anas Nashif 3c50f7aa12 tests: samples: remove duplicate filtering We have many testcases doing filtering both on the architecture level and the platform level, which is redundant. Also many testcases are running the same test twice on the same SoC for no good reason, cleanup the tests and cleanup the filtering. Signed-off-by: Anas Nashif <anas.nashif@intel.com>		2017-06-27 17:44:23 -04:00
..
src	samples: blink_led: Add support for STM32F412	2017-06-02 14:11:13 -04:00
Makefile	…
README.rst	doc: add labels to basic sample docs	2017-04-04 19:51:47 +00:00
prj.conf	…
sample.yaml	tests: samples: remove duplicate filtering	2017-06-27 17:44:23 -04:00

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 0.5Hz. Every 4 seconds,
the blinking frequency will double. When the blinking frequency
reaches 500Hz, the blinking frequency will be halved every 4 seconds
until the blinking frequency reaches 0.5Hz. This completes a whole
blinking cycle. From now on, the LED will repeat the blinking 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

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

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

.. code-block:: console

   $ cd samples/basic/blink_led
   $ make BOARD=arduino_101
   $ make BOARD=arduino_101 flash

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