"Biscotti" firmware for Convoy brand lights
===========================================

This is designed for the Nanjg 105D drivers used in Convoy lights.

The interface is as follows:

  While off:

    - Fully click and release to turn the light on.  It will go to the 
      first mode or the last-used mode, depending on whether you enabled 
      mode memory.

  While on:

    - Short tap: Do a short (less than 0.5s) half-press to go forward to 
      the next mode.

    - Long tap: Do a long (longer than 0.5s) half-press to reset to the 
      first mode (if mode memory is turned off).

    - Or fully click and release to turn the light off.

    - Short tap a bunch of times (10+ taps, or until the light stops 
      turning on) to enter config mode.

  Blinky modes:

    - Some mode groups have blinky modes.  They are not hidden, but if 
      you leave mode memory off you can skip them with a long press.  
      Blinky modes include:

      - Tactical police strobe (~8/16 Hz)

      - Biking flasher (2-level stutter beacon, 1 Hz)

      - Battery check / beacon mode
        Each blink represents about 25% battery charge, so 1 is a low 
        battery and 4 blinks is full.  5 blinks means it's over-charged.

      - SOS

  Configuration options:

    The config mode has several options.  It will blink out a number to 
    show which option is active, then "buzz" or "stutter" for a bit.  
    Click during the "buzz" to select that option.

    Options include:

      1. Mode group.  After clicking, the light should come on in a 
         special group-select mode.  In this mode, it slowly blinks out 
         numbers from 1 to N, where N is the number of mode groups, then 
         repeats.  Turn the light off after N blinks to select mode 
         group N.  BTW, do not leave the light in this mode for long 
         periods of time, because it will wear out the driver's memory 
         faster.

         The mode groups are: (output is approximate)

           1. 0.1%, 1, 10, 35, 100, strobe, biking, battcheck
           2. 0.1, 1, 10, 35, 100
           3. 100, 35, 10, 1, 0.1
           4. 1, 20, 100, strobe, biking, battcheck, SOS
           5. 1, 20, 100
           6. 100, 20, 1
           7. 0.1, 1, 10, 50, strobe, biking, battcheck, SOS
           8. 0.1, 1, 10, 50
           9. 50, 10, 1, 0.1
          10. 1, 10, 35, 100
          11. 100, 20, strobe
          12. 100% only

         Example: To select group 5 (low-med-high), let it blink until 
         it counts out five, then click the button.

      2. Mode memory.  Off or on.