lcd.py

#!/usr/bin/env python
#-*- coding: utf8 -*-

"""
Copyright (C) 2020 Yoann QUERET <yoann@queret.net>
"""

"""
This file is part of ODR-EncoderManager.

ODR-EncoderManager is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

ODR-EncoderManager is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with ODR-EncoderManager.  If not, see <http://www.gnu.org/licenses/>.
"""

import sys
import time
import os
import socket
import argparse

from config import Config
from lcd import LcdMatrix

PORT_SERIE = '/dev/ttyACM0' #identification du port série sur lequel le LCD USB est connecté

LCD_COLS = 16 # Taille du LCD 16 caractères x 2 lignes
LCD_ROWS = 2

def wtitle(title, msg):
    lcd.clear_screen()
    lcd.position( 1, 1 )
    lcd.write( title )

    if len(msg) <= 16:
        lcd.position( 2, 1 )
        lcd.write( msg )
        time.sleep(2)
    else:
        i=0
        while i != len(msg)-15:
            m = msg[i:i+16]
            lcd.position( 2, 1 )
            lcd.write( m )
            if i == 0:
                time.sleep(2)
            else:
                time.sleep(0.5)
            i=i+1
        time.sleep(1)

if __name__ == '__main__':
    # Get configuration file in argument
    parser = argparse.ArgumentParser(description='ODR Encoder Manager (LCD)')
    parser.add_argument('-c','--config', help='configuration filename',required=True)
    cli_args = parser.parse_args()

    # Check if configuration exist and is readable
    if os.path.isfile(cli_args.config) and os.access(cli_args.config, os.R_OK):
        print ("Use configuration file %s" % (cli_args.config))
    else:
        print ("Configuration file is missing or is not readable - %s" % (cli_args.config))
        sys.exit(1)

    # Load configuration
    config = Config(cli_args.config)

    # Load LcdMatrix
    lcd = LcdMatrix( PORT_SERIE )

    # Initialiser la taille du LCD (et sauver dans l'EEPROM)
    lcd.set_lcd_size( LCD_COLS, LCD_ROWS )
    lcd.clear_screen()

    # Set splash screen
    lcd.set_splashscreen( 'DAB+ Encoder    Starting ...    ' )

    # Activer le rétro-éclairage
    lcd.activate_lcd( True )

    # Luminosité max
    lcd.brightness( 255 )

    #  Background RGB
    lcd.color( 120, 120, 255 ) 

    while True:
        lcd.autoscroll( False )

        # Display hostname and admin ip
        lcd.clear_screen()
        lcd.write( 'DAB+ Encoder')
        time.sleep( 2 )

        # Retreive NETWORK IFACE IP
        for card in config.config['global']['network']['cards']:
            try:
                ip = os.popen('ip addr show %s' % (card['card'])).read().split("inet ")[1].split("/")[0]
            except:
                pass
            else:
                lcd.clear_screen()
                wtitle( str('IP iface %s' % (card['alias']) ), ip)
                time.sleep( 4 )