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zephyr/samples/drivers/ht16k33
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Anas Nashif 70758c4374 tests: fix test identifiers 
The seasonal overhaul of test identifiers aligning the terms being used
and creating a structure. This is hopefully the last time we do this,
plan is to document the identifiers and enforce syntax.

The end-goal is to be able to generate a testsuite description from the
existing tests and sync it frequently with the testsuite in Testrail.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
2019-12-09 15:53:44 -05:00
..
src coccinelle: standardize k_sleep calls with integer timeouts 2019-10-09 08:38:10 -04:00
CMakeLists.txt
nrf52840_pca10056.overlay
prj.conf
README.rst
sample.yaml tests: fix test identifiers 2019-12-09 15:53:44 -05:00

README.rst 

.. _ht16k33:

HT16K33 LED driver with keyscan
###############################

Overview
********

This sample controls the LEDs connected to a `Holtek HT16K33`_
driver. The sample supports up to 128 LEDs connected to the
rows/columns of the HT16K33.

The LEDs are controlled using the following pattern:

 1. turn on all connected (up to 128) LEDs one-by-one
 2. blink the LEDs at 2 Hz, 1 Hz, and 0.5 Hz
 3. reduce the brightness gradually from 100% to 0%
 4. turn off all LEDs, restore 100% brightness, and start over

The sample logs keyscan events on the console.

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

Build the application for the :ref:`nrf52840_pca10056` board, and
connect a HT16K33 LED driver at address 0x70 on the I2C-0 bus.

.. zephyr-app-commands::
   :zephyr-app: samples/drivers/ht16k33
   :board: nrf52840_pca10056
   :goals: build
   :compact:

For flashing the application, refer to the Flashing section of the
:ref:`nrf52840_pca10056` board documentation.

References
**********

.. target-notes::

.. _Holtek HT16K33: http://www.holtek.com/productdetail/-/vg/HT16K33