python/lcd-test.py

   1 import RPi.GPIO as GPIO
   2 from RPLCD.gpio import CharLCD
   3 import socket
   4 import fcntl
   5 import struct
   6 import time
   7 from signal import signal, SIGINT
   8 from sys import exit
   9
  10 lcd = CharLCD(cols=20, rows=2, pin_rs=37, pin_e=35, pins_data=[33, 31, 29, 23], numbering_mode=GPIO.BOARD)
  11 lcd.clear()
  12
  13 def handler(signal_received, frame):
  14   lcd.close()
  15   print('SIGINT or CTRL-C detected. Exiting gracefully')
  16   exit(0)
  17
  18 def get_ip_address(ifname):
  19   s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  20   return socket.inet_ntoa(fcntl.ioctl(
  21     s.fileno(),
  22     0x8915,
  23     struct.pack('256s', ifname[:15])
  24   )[20:24])
  25
  26 if __name__ == '__main__':
  27   signal(SIGINT, handler)
  28   while True:
  29     for i in range(0,6):
  30       lcd.clear()
  31       lcd.write_string("Time: %s" %time.strftime("%H:%M:%S"))
  32       lcd.cursor_pos = (1, 0)
  33       lcd.write_string("Date: %s" %time.strftime("%m/%d/%Y"))
  34       time.sleep(1)
  35     lcd.clear()
  36     lcd.write_string("IP Address:")
  37     lcd.cursor_pos = (1, 0)
  38     lcd.write_string(get_ip_address('eth0'))
  39     time.sleep(5)
  40
  41 #lcd.clear()
  42 #lcd.write_string(u'Hello world!')
  43 #lcd.crlf()
  44 #lcd.write_string(u'Hello world!')
  45 lcd.close()