#!/usr/bin/python
# Example using an RGB character LCD connected to an MCP23017 GPIO extender.
import math
import time

import Adafruit_CharLCD as LCD
import Adafruit_GPIO.MCP230xx as MCP


# Define MCP pins connected to the LCD.
lcd_rs        = 7  # RS is actually connected to the RPi GPIO
lcd_en        = 0 #Swapped with d7
lcd_d4        = 1
lcd_d5        = 2
lcd_d6        = 3
lcd_d7        = 4
lcd_red       = 5
lcd_green     = 6
lcd_blue      = 7

# Define LCD column and row size for 16x2 LCD.
lcd_columns = 16
lcd_rows    = 2

# Alternatively specify a 20x4 LCD.
# lcd_columns = 20
# lcd_rows    = 4

# Initialize MCP23017 device using its default 0x20 I2C address.
#gpio = MCP.MCP23017()
#gpio = MCP.MCP23008(address=0x20, busnum=1)
gpio = MCP.MCP23008()

#Initialize the LCD using the pins 
lcd = LCD.Adafruit_RGBCharLCD(lcd_rs, lcd_en, lcd_d4, lcd_d5, lcd_d6, lcd_d7, lcd_columns, lcd_rows, lcd_red, lcd_green, lcd_blue, gpio=gpio)
lcd.message('Hello\nworld!')

## Wait 5 seconds
#time.sleep(5.0)

## Demo showing the cursor.
#lcd.clear()
#lcd.show_cursor(True)
#lcd.message('Show cursor')

#time.sleep(5.0)

## Demo showing the blinking cursor.
#lcd.clear()
#lcd.blink(True)
#lcd.message('Blink cursor')

#time.sleep(5.0)

## Stop blinking and showing cursor.
#lcd.show_cursor(False)
#lcd.blink(False)

## Demo scrolling message right/left.
#lcd.clear()
#message = 'Scroll'
#lcd.message(message)
#for i in range(lcd_columns-len(message)):
	#time.sleep(0.5)
	#lcd.move_right()
#for i in range(lcd_columns-len(message)):
	#time.sleep(0.5)
	#lcd.move_left()

## Demo turning backlight off and on.
#lcd.clear()
#lcd.message('Flash backlight\nin 5 seconds...')
#time.sleep(5.0)
## Turn backlight off.
#lcd.set_backlight(0)
#time.sleep(2.0)
## Change message.
#lcd.clear()
#lcd.message('Goodbye!')
## Turn backlight on.
#lcd.set_backlight(1)