pitextreader.py

#!/usr/bin/python
#
# PiTextReader - Raspberry Pi Printed Text-to-Speech Reader
#
# Allows sight impaired person to have printed text read using
# OCR and text-to-speech.
#
# Normally run by pi crontab at bootup
# Turn off by commenting out @reboot... using $ crontab -e; sudo reboot
# Manually run using $ python pitextreader.py
#
# This is a simplistic (i.e. not pretty) python program
# Just runs cmd-line pgms raspistill, tesseract-ocr, flite to do all the work
#
# Version 1.0 2018.02.10 - initial release - rgrokett
# v1.1 - added some text cleanup to improve reading
# v1.2 - removed tabs
#
# http://kd.grokett.com/
#
# License: GPLv3, see: www.gnu.org/licenses/gpl-3.0.html
#

import time
import sys

from logger import logger
from app import App

import RPi.GPIO as GPIO
from gpiozero import Button

from constantes import SOUNDS


# We need to keep button object on scope so
# that they are not garbage collected
buttons = []


def init_gpio(app):
    """
    Link GPIO pins and callback according to app.associations
    """
    for i in range(len(app.associations)):
        pin = app.associations[i][0]
        callback = app.associations[i][1]
        GPIO.setup(pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
        logger.info("Bouton gpio %d" % (pin))
        button = Button(pin)
        button.when_pressed = callback

        buttons.append(button)


######
# MAIN
######


try:
    app = App()
    app.settings.set_volume_help()
    app.leds.light(0)

    GPIO.setmode(GPIO.BCM)
    init_gpio(app)

    time.sleep(2)
    app.player.play(SOUNDS + 'ready')
    # speak("OK, on est pret")
    # app.leds.set(1)

    while True:
        time.sleep(10)
    # end while

except KeyboardInterrupt:
    logger.info("exiting")
    app.close()

    sys.exit(0)