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add alarmMonitor for Rasbperry with RPiDisplay
This is an alarmMonitor for receive alarm-messages from BOSWatch and show them on a touchscreen The jsonSocketServer controlls an Watterott RPi-Display in case of received POCSAG-RIC Implemented functions: - asynchronous threads for display control - show ric-description and alarm-message on display - different colours for no alarm, test alarm and alarm - auto-turn-off display - show POCSAG is alive status (coloured clock)
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279
exampleAddOns/alarmMonitorRPi/displayServices.py
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279
exampleAddOns/alarmMonitorRPi/displayServices.py
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#!/usr/bin/python
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# -*- coding: UTF-8 -*-
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#
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"""
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alarmMonitor - displayServices
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@author: Jens Herrmann
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"""
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#
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# Only works as an asynchronous thread
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# will call "exit(0)" when function is finished
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#
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def autoTurnOffDisplay():
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"""
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Asynchronous function to turn of the display backlight
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@requires: globals.showDisplay - status of backlight
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@requires: globals.enableDisplayUntil - given timestamp to turn off backlight
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@requires: globals.running - service runs as long as this is True
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In case of an exception the function set globals.abort to True.
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This will terminate the main program.
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@return: nothing
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@exception: SystemExit exception in case of an error
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"""
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import sys
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import time
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import logging
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import ConfigParser
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import globals
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logging.debug("autoTurnOffDisplay-thread started")
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try:
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# Running will be set to False if main program is shutting down
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while globals.running == True:
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# check if timestamp is in the past
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if (globals.showDisplay == True) and (globals.enableDisplayUntil < int(time.time())):
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globals.showDisplay = False
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logging.info("display turned off")
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# we will do this only one time per second
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time.sleep(1)
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except:
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logging.error("unknown error in autoTurnOffDisplay-thread")
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logging.debug("unknown error in autoTurnOffDisplay-thread", exc_info=True)
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# abort main program
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globals.abort = True
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sys.exit(1)
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finally:
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logging.debug("exit autoTurnOffDisplay-thread")
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exit(0)
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#
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# Only works as an asynchronous thread
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# will call "exit(0)" when function is finished
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#
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def eventHandler():
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"""
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Asynchronous function to handle pygames events
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in particular the touchscreen events
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@requires: globals.showDisplay - status of backlight
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@requires: globals.enableDisplayUntil - timestamp to turn off backlight
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@requires: globals.running - service runs as long as this is True
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@requires: configuration has to be set in the config.ini
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In case of an exception the function set globals.abort to True.
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This will terminate the main program.
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@return: nothing
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@exception: SystemExit exception in case of an error
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"""
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import sys
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import time
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import logging
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import ConfigParser
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import pygame
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import globals
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logging.debug("eventHandler-thread called")
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try:
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clock = pygame.time.Clock()
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# Running will be set to False if main program is shutting down
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while globals.running == True:
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# This limits the while loop to a max of 2 times per second.
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# Leave this out and we will use all CPU we can.
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clock.tick(2)
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# current time for this loop:
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curtime = int(time.time())
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for event in pygame.event.get():
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# event-handler for QUIT
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if event.type == pygame.QUIT:
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globals.running = False
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# if touchscreen pressed
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if event.type == pygame.MOUSEBUTTONDOWN:
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if globals.showDisplay:
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logging.info("turn OFF display")
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globals.showDisplay = False
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else:
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logging.info("turn ON display")
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globals.enableDisplayUntil = curtime + globals.config.getint("AlarmMonitor","showDisplayTime")
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globals.showDisplay = True
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except:
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logging.error("unknown error in eventHandler-thread")
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logging.debug("unknown error in eventHandler-thread", exc_info=True)
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# abort main program
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globals.abort = True
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sys.exit(1)
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finally:
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logging.debug("exit eventHandler-thread")
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exit(0)
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#
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# Only works as an asynchronous thread
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# will call "exit(0)" when function is finished
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#
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def displayPainter():
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"""
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Asynchronous function to build the display content
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@requires: globals.showDisplay - status of backlight
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@requires: globals.enableDisplayUntil - given timestamp when backlight will turned off
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@requires: globals.running - service runs as long as this is True
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@requires: globals.data - data of the last alarm
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@requires: globals.lastAlarm - timestamp of the last processing (see alarmRICs and keepAliveRICs)
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@requires: configuration has to be set in the config.ini
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In case of an exception the function set globals.abort to True.
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This will terminate the main program.
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@return: nothing
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@exception: SystemExit exception in case of an error
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"""
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import sys
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import time
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import logging
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import ConfigParser
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import RPi.GPIO as GPIO
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import pygame
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from wrapline import wrapline
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import globals
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logging.debug("displayPainter-thread called")
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try:
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# use GPIO pin numbering convention
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GPIO.setmode(GPIO.BCM)
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GPIO.setwarnings(False)
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# set up GPIO pin for output
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GPIO.setup(globals.config.getint("Display","GPIOPinForBacklight"), GPIO.OUT)
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pygame.init()
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#screen size
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size = (globals.config.getint("Display","displayWidth"), globals.config.getint("Display","displayHeight"))
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screen = pygame.display.set_mode(size)
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# disable mouse cursor
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pygame.mouse.set_visible(False)
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#define fonts
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fontHeader = pygame.font.Font(None, 30)
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fontHeader.set_bold(True)
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fontHeader.set_underline(True)
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fontRIC = pygame.font.Font(None, 30)
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fontRIC.set_bold(True)
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fontMsg = pygame.font.Font(None, 20)
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fontTime = pygame.font.Font(None, 15)
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clock = pygame.time.Clock()
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logging.debug("displayPainter-thread started")
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# Running will be set to False if main program is shutting down
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while globals.running == True:
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# This limits the while loop to a max of 2 times per second.
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# Leave this out and we will use all CPU we can.
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clock.tick(2)
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# current time for this loop:
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curtime = int(time.time())
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if globals.showDisplay:
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# Enable LCD display
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GPIO.output(globals.config.getint("Display","GPIOPinForBacklight"), GPIO.HIGH)
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# Clear the screen and set the screen background
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screen.fill(globals.screenBackground)
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widthX = globals.config.getint("Display","displayWidth") - 20
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widthY = globals.config.getint("Display","displayHeight") - 20
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pygame.draw.rect(screen, pygame.Color(globals.config.get("AlarmMonitor","colourBlack")), (10, 10, widthX, widthY))
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# header
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header = fontHeader.render("Alarm-Monitor", 1, pygame.Color(globals.config.get("AlarmMonitor","colourRed")))
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(width, height) = fontHeader.size("Alarm-Monitor")
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x = (int(globals.config.getint("Display","displayWidth")) - width)/2
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screen.blit(header, (x, 20))
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# Alarm - RIC:
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try:
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y = 50
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textLines = wrapline(globals.data['description'], fontRIC, (globals.config.getint("Display","displayWidth") - 40))
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for index, item in enumerate(textLines):
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textZeile = fontRIC.render(item, 1, pygame.Color(globals.config.get("AlarmMonitor","colourWhite")))
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screen.blit(textZeile, (20, y))
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y += 25
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except KeyError:
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pass
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# Alarm - Text
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try:
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y += 10
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textLines = wrapline(globals.data['msg'].replace("*", " * "), fontMsg, (globals.config.getint("Display","displayWidth") - 40))
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for index, item in enumerate(textLines):
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textZeile = fontMsg.render(item, 1, pygame.Color(globals.config.get("AlarmMonitor","colourGrey")))
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screen.blit(textZeile, (20, y))
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y += 20
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except KeyError:
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pass
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# show time of last alarm
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if globals.lastAlarm > 0:
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try:
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# format last alarm
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lastAlarmString = time.strftime("%H:%M:%S", time.localtime(globals.lastAlarm))
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# Color time:
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# red: lastAlarm more than n (delayForRed) seconds past
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if (int(globals.lastAlarm) + globals.config.getint("AlarmMonitor","delayForRed")) < curtime:
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timeColour = pygame.Color(globals.config.get("AlarmMonitor","colourRed"))
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# yellow: lastAlarm more than n (delayForYellow) seconds past
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elif (int(globals.lastAlarm) + globals.config.getint("AlarmMonitor","delayForYellow")) < curtime:
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timeColour = pygame.Color(globals.config.get("AlarmMonitor","colourYellow"))
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# dgrey: normal
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else:
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timeColour = pygame.Color(globals.config.get("AlarmMonitor","colourGreen"))
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lastAlarm = fontTime.render(lastAlarmString, 1, timeColour)
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(width, height) = fontTime.size(lastAlarmString)
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x = globals.config.getint("Display","displayWidth") - 20 - width
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screen.blit(lastAlarm, (x, 20))
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except:
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logging.debug("unknown error in lastAlarm", exc_info=True)
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pass
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# show remaining time before display will be turned off:
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restZeit = globals.enableDisplayUntil - curtime +1
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zeit = fontTime.render(str(restZeit), 1, pygame.Color(globals.config.get("AlarmMonitor","colourDimGrey")))
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screen.blit(zeit, (20, 20))
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else:
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GPIO.output(globals.config.getint("Display","GPIOPinForBacklight"), GPIO.LOW)
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# Update display...
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pygame.display.update()
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except:
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logging.error("unknown error in displayPainter-thread")
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logging.debug("unknown error in displayPainter-thread", exc_info=True)
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# abort main program
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globals.abort = True
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sys.exit(1)
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finally:
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logging.debug("exit displayPainter-thread")
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GPIO.output(globals.config.getint("Display","GPIOPinForBacklight"), GPIO.LOW)
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GPIO.cleanup()
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pygame.quit()
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exit(0)
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