The DS3231 is an I2C real-time clock with internal temperature
compensated oscillator, maintaining civil time to 1 s precision with
nominal 2 ppm accuracy from 0-40 Cel.
The basic functionality is exposed as a counter that is always running
at 1 Hz. Much more functionality is exposed as driver-specific API,
including the ability to translate between the time scale of the DS3231
and the time scale of the Zephyr uptime clock. This allows correlation
of events in the system clock to UTC, TAI, or whatever time scale is
used to maintain the DS3231.
Signed-off-by: Peter A. Bigot <pab@pabigot.com>
This is similar to the LPD8806 sample, but uses the WS2812 driver
instead. The app configuration is a bit more finicky, so try to
provide helpful references. This could be made more beginner-friendly
with the addition of timing diagrams, etc., but this should be enough
for an experienced developer to use.
Signed-off-by: Marti Bolivar <marti.bolivar@linaro.org>
This sample displays the colors red, green, and blue on consecutive
LEDs in an LED strip, moving the starting point where red begins
further down the strip at each time step. The color band wraps around
to the beginning when it reaches the end.
Since this is the first application in samples/drivers to have
documentation, add samples/drivers/drivers.rst as well, and include it
in the top-level toctree from samples/samples.rst.
Signed-off-by: Marti Bolivar <marti.bolivar@linaro.org>
Joakim Andersson