The logo module is currently unused but it simply sits there consuming
flash. Let's shift it to the demo app to is can consume RAM instead (but
only when we upload the demo to the watch).
sx is measured in pixels (2-bytes) and len(display.linebuffer) gives
a value in bytes so the divisor isn't right.
Whilst we are here let's make sure we use integer division too.
Fixes: #18
wasp-os contains circular import dependancies (wasp includes apps which
include wasp) but this is normally harmless.
However using __init__.py exagerated to the problem and since the benefit
of the __init__ file is pretty anyway the let's just remove it.
The code to recalculate the uptime to walltime adjustment was broken
(e.g. the longer we leave it after reboot the more inaccurate the time
setting becomes).
Fixes: 80079e4 ("wasp: nrf_rtc: Add a tiny bit of extra resolution")
We now have a couple of applications (stopwatch, Game of Life) that benefit
from sub-second precision. The micropython RTC/utime code for nrf still
needs a major overhaul but this allows us to paper over the cracks for
just a little longer.
On nRF devices if we print with the NUS console disconnected (instead
of never connected) then things we can end up hanging. Better only
to print an exception if the watch class contains a method to do
that.
This is getting us much closer to the final UI concept. We have a
quick ring from which we can select typical apps such as clock and
stopwatch which will (eventually) be supplemented with step counting
and heart rate monitoriing. More exotic apps (currenrtly torch, self
test, settings) are all relagated to the launcher ring.
There are still some holes here. In particular the RTC resolution on
nRF devices (such as PineTime) is currently a full second (meaning
the centiseconds will always be zero. Nevertheless that isn't the apps
fault... as we can see when we run on the simulator.
If an application crashes let's report it on the device so it can be
distinguished from a hang (if nothing else it should mean we get better
bug reports).
