…s usb,leds

I am definitely struggling a bit with what's coming back from the
USB calls, and I don't know yet how really to initialize the neopixel

There's a bunch of commented out code that is in the direction of what
I mean to do.

… off.

WIP: trying to have the morse code generation at least emit .__. to
the serial port, but reinitializing the interface doesn't make
sense. Need to refactor so that the global abstraction for the hardware
we've configured is more globally accessible (or easier to pass around.)

this iteration.

yet.)

with a duration of 1.

we do handle an empty queue.

Next, make the queue into a circular buffer, and push stuff into
it.

It would sure be nice to have some tests.

interval.)

drain the last state.)

Board now blinks S-N-S, followed after an interval with a 10 unit
long ON pulse.

doesn't honor this yet.)

queue.

independently.

Note that the queue doesn't (currently) worry about overflow. It
CAN and WILL overflow if it's filled faster than it drains.
That said, all that results is some states not being rendered to
the pins.

It still would benefit from a letter queue, but this works as long
as you don't type too fast.

Needs some cleanup though.

I left the stubs of the character queue in place, so I can finish
that out, but this is way shorter now.

I wish I had a way to generate the initial queue state, but iterators
are part of std, which we don't have access to.

Next we should use it.

else.

Tried to make the USB loop provide queue length stats, but not having
std in embedded rust meant I wasn't sure how to convert my usize into
a string. (I made it a u32 at least.)

QA'd all letters and numbers but haven't verified punctuation.

The module isn't used yet.