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#!/usr/bin/python
############################
# Imports #
############################
import threading
import RPi.GPIO as GPIO
from time import sleep
import subprocess
############################
# Class de controle du LCD #
############################
class HD44780(threading.Thread):
######################
# Variable Shared #
######################
_PULSE = 0.00005
_DELAY = 0.00005
######################
# Constructeur #
######################
def __init__(self, pin_rs=7, pin_e=8, pins_db=[25, 24, 23, 18], lcd_width=16):
self.message = ""
self.currentmessage = "azertyuiop"
self.stop = False
self.lcd_width = lcd_width
self.pin_rs = pin_rs
self.pin_e = pin_e
self.pins_db = pins_db
GPIO.setmode(GPIO.BCM) # Use BCM GPIO numbers
GPIO.setup(self.pin_e, GPIO.OUT)
GPIO.setup(self.pin_rs, GPIO.OUT)
for pin in self.pins_db:
GPIO.setup(pin, GPIO.OUT)
self.Clear()
threading.Thread.__init__(self)
######################
# Demarrage du Thread#
######################
def run(self):
while self.stop == False:
if self.message != self.currentmessage:
self.currentmessage = self.message
self.LcdMessage()
sleep(1)
######################
# Arret du Thread #
######################
def Stop(self):
self.stop = True
######################
# Initialisation LCD #
######################
def Clear(self):
""" Blank / Reset LCD """
self.LcdByte(0x33, False) # $33 8-bit mode
self.LcdByte(0x32, False) # $32 8-bit mode
self.LcdByte(0x28, False) # $28 8-bit mode
self.LcdByte(0x0C, False) # $0C 8-bit mode
self.LcdByte(0x06, False) # $06 8-bit mode
self.LcdByte(0x01, False) # $01 8-bit mode
######################
#Execution sur le LCD#
######################
def LcdByte(self, bits, mode):
""" Send byte to data pins """
# bits = data
# mode = True for character
# False for command
GPIO.output(self.pin_rs, mode) # RS
# High bits
for pin in self.pins_db:
GPIO.output(pin, False)
if bits&0x10==0x10:
GPIO.output(self.pins_db[0], True)
if bits&0x20==0x20:
GPIO.output(self.pins_db[1], True)
if bits&0x40==0x40:
GPIO.output(self.pins_db[2], True)
if bits&0x80==0x80:
GPIO.output(self.pins_db[3], True)
# Toggle 'Enable' pin
sleep(HD44780._DELAY)
GPIO.output(self.pin_e, True)
sleep(HD44780._PULSE)
GPIO.output(self.pin_e, False)
sleep(HD44780._DELAY)
# Low bits
for pin in self.pins_db:
GPIO.output(pin, False)
if bits&0x01==0x01:
GPIO.output(self.pins_db[0], True)
if bits&0x02==0x02:
GPIO.output(self.pins_db[1], True)
if bits&0x04==0x04:
GPIO.output(self.pins_db[2], True)
if bits&0x08==0x08:
GPIO.output(self.pins_db[3], True)
# Toggle 'Enable' pin
sleep(HD44780._DELAY)
GPIO.output(self.pin_e, True)
sleep(HD44780._PULSE)
GPIO.output(self.pin_e, False)
sleep(HD44780._DELAY)
######################
#Affichage sur le LCD#
######################
def LcdMessage(self):
""" Send string to LCD. Newline wraps to second line"""
self.Clear()
text = self.currentmessage
self.LcdByte(0x80, False)
for c in text:
if c == '\n':
self.LcdByte(0xC0, False) # next line
else:
self.LcdByte(ord(c),True)
######################
#Definir le message #
######################
def LcdSetMessage(self, text):
self.message = text.ljust(self.lcd_width," ")
################################
# Class Informations Systeme #
################################
class SysInfo(threading.Thread):
######################
# Constructeur #
######################
def __init__(self):
self.count = 0
self.lcd = HD44780()
self.stop = False
threading.Thread.__init__(self)
######################
# Demarrage du Thread#
######################
def run(self):
self.lcd.start()
while self.stop == False:
if self.count == 0:
self.lcd.LcdSetMessage("premier\nmessage ")
elif self.count == 1:
self.lcd.LcdSetMessage("second\nmessage ")
elif self.count == 2:
self.lcd.LcdSetMessage("troisieme\nmessage ")
elif self.count == 3:
self.lcd.LcdSetMessage("quatrieme\nmessage ")
elif self.count == 4:
self.lcd.LcdSetMessage("cinquieme\nmessage ")
else:
self.lcd.LcdSetMessage("sixieme\nmessage ")
self.count += 1
if self.count == 6:
self.count = 0
sleep(5)
######################
# Arret du Thread #
######################
def Stop(self):
self.lcd.Stop()
self.stop = True
######################
# MAIN STARTER #
######################
if __name__ == '__main__':
si = SysInfo()
si.start()
q = str(raw_input('Press ENTER to quit program'))
si.Stop() |
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