Reading temperature and sensor ID

-- Read sensor temperature DS18B20 in Celsius degree.

-- It is about an unique device on 1wire bus

-- Copyright Vasile Guta Ciucur

-- New BSD License

include freejalduino4

include delay

alias d1w_bus_in   is D11

alias d1w_bus_out  is D11_direction

include 1_wire

-- LCD IO definition

alias lcd_rs           is D9            -- LCD command/data select.

alias lcd_en           is D8            -- LCD data trigger

alias lcd_rs_direction is D9_direction

alias lcd_en_direction is D8_direction

alias  lcd_d4        is  D3

alias  lcd_d5        is  D4

alias  lcd_d6        is  D5

alias  lcd_d7        is  D6

alias  lcd_d4_direction        is  D3_direction

alias  lcd_d5_direction        is  D4_direction

alias  lcd_d6_direction        is  D5_direction

alias  lcd_d7_direction        is  D6_direction

const byte LCD_ROWS     = 2             -- 2 lines

const byte LCD_CHARS    = 16            -- 16 chars per line

enable_digital_io()

lcd_rs_direction = output

lcd_en_direction = output

lcd_d4_direction = output

lcd_d5_direction = output

lcd_d6_direction = output

lcd_d7_direction = output

-- LED IO definition - Uncomment the lines if you want tp use leds for debug

--alias led is D13

--alias led_direction is D13_direction

--alias led2 is D2

--alias led2_direction is D2_direction

--led_direction = output

--led2_direction = output

--led = low

--led2 = low

include lcd_hd44780_4                   -- LCD library with 4 data lines

include print                           -- formatted output library

include ds18b20

const byte str1[] = "Temp.= "

lcd_init()                              -- initialize LCD

print_string(lcd, str1)

var bit sign

var byte units, decimals

var byte i

forever loop                            -- loop forever

  convert_18B20

  s_temp_18B20_CRC(units, decimals, sign)

  lcd_cursor_position(0,7)

  if sign == 1 then

    lcd = "-"

  end if

  print_byte_dec(lcd, units)

  lcd = "."

  print_byte_dec(lcd, decimals)

  lcd = "C"

  -- read the device's ID and print it

  s_read_rom_18B20

  lcd_cursor_position(1,0)

  for 8 using i loop

    print_byte_hex(lcd, rom_ID[i])

  end loop

end loop

--