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zephyr/samples/drivers/ht16k33
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Kumar Gala a1b77fd589 zephyr: replace zephyr integer types with C99 types 
git grep -l 'u\(8\|16\|32\|64\)_t' | \
		xargs sed -i "s/u\(8\|16\|32\|64\)_t/uint\1_t/g"
	git grep -l 's\(8\|16\|32\|64\)_t' | \
		xargs sed -i "s/s\(8\|16\|32\|64\)_t/int\1_t/g"

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
 		2020-06-08 08:23:57 -05:00
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boards
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src zephyr: replace zephyr integer types with C99 types 2020-06-08 08:23:57 -05:00
CMakeLists.txt
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README.rst
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prj.conf
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sample.yaml
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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:`nrf52840dk_nrf52840` board, and
connect a HT16K33 LED driver at address 0x70 on the I2C-0 bus.

.. zephyr-app-commands::
   :zephyr-app: samples/drivers/ht16k33
   :board: nrf52840dk_nrf52840
   :goals: build
   :compact:

For flashing the application, refer to the Flashing section of the
:ref:`nrf52840dk_nrf52840` board documentation.

References
**********

.. target-notes::

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