class Time7Segment

# File lib/time7segment.rb, line 31
def initialize(gpio=%w(22 27 17 24 11 4 23 8 20 10 18 25), refresh: 0.005)

  pins = SimpleRaspberryPi.new(gpio).pins
  @digits, @segments, @refresh = pins.take(4), pins.slice(4..-1), refresh
  
  a = [0x7E, 0x30, 0x6D, 0x79, 0x33, 0x5B, 0x5F, 0x70, 0x7F, 0x7B]
  
  @numerals = a.map do |x|
    x.to_s(2).rjust(7,'0').chars.map {|x| x == '1' ? :off : :on }
  end
  
end

# File lib/time7segment.rb, line 44
def start

  loop do

    Time.now.strftime("%H%M").chars.each.with_index do |x,i|
      
      n = x.to_i
      display(n); @segments[7].method( i == 1 ? :off : :on).call
      @digits[i].on

      refresh = @refresh
      
      # reduce the sleep time for digit 1 since it takes less time to
      # update the segments. This gives a more balanced brightness display,
      # especially for digits 0 and 8

      refresh -= refresh / 2 if n == 1
      sleep refresh

      @digits[i].off

    end

  end

end

# File lib/time7segment.rb, line 75
def display(n)

  @numerals[n].each.with_index {|x,i| @segments[i].method(x).call}

end