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This UI implements smooth ramping. The interface is:
From off:
- Short press to access the last-used mode.
- Long press to enter moon mode and optionally start ramping.
- Double click for the highest mode.
While on:
- Short press to turn off.
- Long press and hold to ramp brightness up or down. Stops at the
highest and lowest levels, and auto-reverses when appropriate.
- After releasing a ramp action, ramp again within 1 second to reverse
the ramp direction. This way if you go too far, just release and
ramp again to go back to where you intended to stop.
- (TODO) Double click for a blinky mode (beacon?).
Low-voltage protection is enabled by default, but turbo step-down is
not. Change the compile-time options if you want turbo (there isn't
enough room for it with the default options).
If you enable PFM (pulse frequency modulation), the ramp should be
smoother at the lowest levels. Otherwise, the lowest levels will ramp
in a stair-step pattern.
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