leds/leds.py

#!/usr/bin/env python

#
# based on code from lrvick and LiquidCrystal
# lrvic - https://github.com/lrvick/raspi-hd44780/blob/master/hd44780.py
# LiquidCrystal - https://github.com/arduino/Arduino/blob/master/libraries/LiquidCrystal/LiquidCrystal.cpp
#

from time import sleep
import lcd_manager
import light_manager


debug_statements = True


def debug(msg):
    if debug_statements:
        print(msg)


def lightlevel(lcd, level):
    debug("display level")
    lcd.clear()
    lcd.message("Light Level:\n]" + "-"*level + "[")


def querylightlevel():
    debug("NYI")
    return 7


def color(lcd):
    lcd.clear()
    lcd.message("new pattern loaded.")
    debug("NYI")


def loop():
    lcd = lcd_manager.Adafruit_CharLCD()
    lights = light_manager.LightStrip()
    level = 0
    level_max = 14
    idle = 0
    idle_max = 15
    cur_color = (255, 255, 255)
    while True:
        debug("loop")
        query_level = querylightlevel()
        idle = idle + 1
        debug("idle value: {}".format(idle))
        lights.tick()
        if query_level != level:
            level = query_level
            lights.set_light_level(level / level_max)
            idle = 0
            if lcd.displaycontrol & lcd.LCD_DISPLAYON != lcd.displaycontrol:
                lcd.display()
            lightlevel(lcd, level)
        elif idle >= idle_max:
            debug("hit idle threshold")
            idle = idle_max
            lcd.noDisplay()
        else:
            lightlevel(lcd, level)
        sleep(1)


if __name__ == '__main__':
    loop()