# coding: utf-8

@lcd_address = 0x3e
@rtc_address = 0x32
  
def lcd_cmd(i2c, cmd)
  i2c.write(@lcd_address, [0x00, cmd])
end

def lcd_data(i2c, data)
  i2c.write(@lcd_address, [0x40, data])
end

def lcd_clear(i2c)
  lcd_cmd(i2c, 0x01)
  sleep 0.1
end

def lcd_home0(i2c)
  lcd_cmd(i2c, 0x02)
  sleep 0.1
end

def lcd_home1(i2c)
  lcd_cmd(i2c, 0x40|0x80)
  sleep 0.1
end

def lcd_cursor(i2c, x, y)
  pos = (x + y * 0x40) | 0x80 
  lcd_cmd(i2c, pos)
  sleep 0.1
end

def lcd_init(i2c)
  sleep 0.2
  [0x38, 0x39, 0x14, 0x70, 0x56, 0x6c].each do |cmd|
    lcd_cmd(i2c, cmd)
  end
  sleep(0.3)
  [0x38, 0x0c, 0x01].each do |cmd|
    lcd_cmd(i2c, cmd)
  end
  sleep(0.1)
end

def lcd_print(i2c, data)
  data.length.times do |n|
    lcd_data(i2c, data[n].ord)
  end
end

def rtc2_init(i2c)
  i2c.write(0x32, [0xE0, 0x00, 0x00])
  sleep 0.1
end

def rtc2_set(i2c)
  i2c.write(@rtc_address, [0x00, 0x50, 0x59, 0x23|0x80, 0x01, 0x31, 0x10, 0x20])
  sleep 0.1
  i2c.write(@rtc_address, [0xF0, 0x00])
  sleep 0.1
end

def rtc2_get(i2c, tt)
  buf = i2c.read_integer(@rtc_address, 8)   # 8 バイト分読み込み
  tt['year'] = buf[7]
  tt['mon']  = buf[6]
  tt['mday'] = buf[5]
  tt['hour'] = buf[3] & 0x3f
  tt['min']  = buf[2]
  tt['sec']  = buf[1]
end


#I2C 初期化
i2c = I2C.new(22, 21)

# LCD 初期化
lcd_init(i2c)

# LCD に "Hello World" 表示
lcd_cursor(i2c, 1, 0)
lcd_print(i2c, "Hello!")

lcd_home1(i2c)
lcd_print(i2c, "from ESP")

sleep(5)

# RTC 初期化. 時刻設定
rtc2_init(i2c)
rtc2_set(i2c)

while true
  # 時刻表示
  tt = {}  #ハッシュ
  rtc2_get(i2c, tt)

  time0 = sprintf("%02x-%02x-%02x", tt['year'], tt['mon'], tt['mday'])
  time1 = sprintf("%02x:%02x:%02x", tt['hour'], tt['min'], tt['sec'])
  
  lcd_home0(i2c)
  lcd_print(i2c, time0)
  puts time0

  lcd_home1(i2c)
  lcd_print(i2c, time1)
  puts time1

  sleep(1)
end


class RTC2










end  






























class LCD
  3 
  4    ADDRESS = 0x3e
  5   
  6    def initialize(i2c)
  7      @i2c = i2c
  8    end
  9   
  10   def cmd(cmd)
  11     @i2c.write(LCD::ADDRESS, [0x00, cmd])
  12   end
  13   
  14   def data(data)
  15     @i2c.write(LCD::ADDRESS, [0x40, data])
  16   end
  17   
  18   def clear()
  19     cmd(0x01)
  20     sleep 0.1
  21   end
  22   
  23   def home0()
  24     cmd(0x02)
  25     sleep 0.1
  26   end
  27   
  28   def home1()
  29     cmd(0x40|0x80)
  30     sleep 0.1
  31   end
  32   
  33   def cursor(x, y)
  34     pos = (x + y * 0x40) | 0x80 
  35     cmd(pos)
  36     sleep 0.1
  37   end
  38   
  39   def init()
  40     sleep 0.2
  41     [0x38, 0x39, 0x14, 0x70, 0x56, 0x6c].each do |cmd|
  42       cmd(cmd)
  43     end
  44     sleep(0.3)
  45     [0x38, 0x0c, 0x01].each do |cmd|
  46       cmd(cmd)
  47     end
  48     sleep(0.1)
  49   end
  50   
  51   def print(data)
  52     data.length.times do |n|
  53       data(data[n].ord)
  54     end
  55   end
  56   
  57 end