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Modified Iceclock firmware

This is a set of heavily modified firmware for the Adafruit Industries Iceclock.

The internals are significantly different from the original firmware, but there are also a number of new user-visible features.

New User-visible Features

• Don’t show leading ‘0’ on hours (in US region) or days
• Four selectable seconds display modes:
  1. Normal seconds display
  2. AM/PM display (US region)
  3. “Dial” display (show seconds to 10second resolution around edge of a display digit, blinking center segment)
  4. None – just a blinking dot
• Time-based auto-dim: set “morning” and “evening” hours and brightnesses
• Alarm blinks brightness from min to max (even while snooze is active)
• selectable snooze time

Todo:

• alarms for specific days of the week (or perhaps just weekend/weekday)
• multiple alarms
• selectable alarm tones

Internal changes

The internals have been considerably changed:

• Central button state machine to handle debounce and repeat (avoiding a pile of repeated code on every button-read)
  • Incorporates “debounce crash” fix
• Table-driven menu display
  • New menus are just a new table
  • All time/date display reuses the menu display code
• All “application” logic moved to main loop
  • No display updates from interrupt routines
• Much smaller code size (9.5k program size for baseline; 8.5k with new features; data size also much smaller)