Lab 2

Part 1

• Part 1 of the lab involves polling PIND for switch changes.
• Debouncing is done by ensuring consistent reads of the pin.

Part 2

• We write digits 0-9 in a loop to the display.
• An LCDNumber is an array of 2-byte row encodings that will be looped and masked via the colList in the function writeNumber which in turn uses writeLED and then shiftOut

Part 3

• The same as Part 2, except now we additionally listen for button presses with an interrupt handler in order to increment the display digits.
• The handler is called handleButton
• Debouncing is done on the rising edge of the button press, in which we just consistently write the current number state.