#!/usr/bin/python -O
# Blinky Script
# This script will blink a LED ON and OFF again.
#
# Created on Feb 2, 2013 by Steven Smethurst
# Version: 1.00
#
# Directions
# Connect a LED between Pin 6 ( Ground) and pin 12 (GPIO18)
#
# -- Revision History --
# 20130210      - Adam Scriven  - Added ability to choose on/off times for blink mode
# 20130206      - Adam Scriven  - Added morse code, adapted from: http://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/robot/resources/morse_code.py
# 20130205      - Adam Scriven  - Initial from web
#

import time
import RPi.GPIO as GPIO
import sys

# Setup variables
#
version         = "v1.1"
ledPin          = 12
morseCodeUnit   = 0.2
MORSECODE = {' ': ' ',
        "'": '.----.',
        '(': '-.--.-',
        ')': '-.--.-',
        ',': '--..--',
        '-': '-....-',
        '.': '.-.-.-',
        '/': '-..-.',
        '0': '-----',
        '1': '.----',
        '2': '..---',
        '3': '...--',
        '4': '....-',
        '5': '.....',
        '6': '-....',
        '7': '--...',
        '8': '---..',
        '9': '----.',
        ':': '---...',
        ';': '-.-.-.',
        '?': '..--..',
        'A': '.-',
        'B': '-...',
        'C': '-.-.',
        'D': '-..',
        'E': '.',
        'F': '..-.',
        'G': '--.',
        'H': '....',
        'I': '..',
        'J': '.---',
        'K': '-.-',
        'L': '.-..',
        'M': '--',
        'N': '-.',
        'O': '---',
        'P': '.--.',
        'Q': '--.-',
        'R': '.-.',
        'S': '...',
        'T': '-',
        'U': '..-',
        'V': '...-',
        'W': '.--',
        'X': '-..-',
        'Y': '-.--',
        'Z': '--..',
        '_': '..--.-'
}

# Setup GPIO LED handling and dot/dash config
#
GPIO.setmode(GPIO.BOARD)
GPIO.setup(ledPin, GPIO.OUT )
def dot():
        GPIO.output(ledPin,1)
        time.sleep(morseCodeUnit)
        sys.stdout.write('.')
        sys.stdout.flush()
        GPIO.output(ledPin,0)
        time.sleep(morseCodeUnit)

def dash():
        GPIO.output(ledPin,1)
        time.sleep(morseCodeUnit * 3)
        sys.stdout.write('-')
        sys.stdout.flush()
        GPIO.output(ledPin,0)
        time.sleep(morseCodeUnit)

# print about info
print "Blinky script, "+ version

while True:
        input   = raw_input('Do morse code [y|n]? ')
        if input == 'n':
                onTime  = raw_input('How long should the light be on in seconds? ')
                offTime = raw_input('How long should the light be off in seconds? ')
                print "Blinking, "+ onTime + "s on, " +  offTime + "s off."
                while 1:
                        GPIO.output(ledPin, GPIO.HIGH )
                        time.sleep(float(onTime))
                        GPIO.output(ledPin, GPIO.LOW )
                        time.sleep(float(offTime))
        else:
                input = raw_input('What would you like to send? ')
                for letter in input:
                                for symbol in MORSECODE[letter.upper()]:
                                        if symbol == '-':
                                                dash()
                                        elif symbol == '.':
                                                dot()
                                        else:
                                                time.sleep(0.5)
                                                sys.stdout.write(' ')
                                                sys.stdout.flush()
                                time.sleep(0.5)
                                sys.stdout.write(' ')
                                sys.stdout.flush()
                print