Rick.py

import RPi.GPIO as GPIO
import time
import os

pins = (13,26)


score = 'Ab Bb Db Bb F F Eb ' \
        'Ab Bb Db Bb Eb Eb Db C Bb '\
        'Ab Bb Db Bb Db Eb C Bb Ab R Ab Eb Db R '\
        'Ab Bb Db Bb F F Eb '\
        'Ab Bb Db Bb Ab C Db C Bb '\
        'Ab Bb Db Bb Db Eb C Bb Ab R Ab Eb Db Db'

octave = '0 0 1 0 1 1 1 ' \
        '0 0 1 0 1 1 1 0 0 '\
        '0 0 1 0 1 1 1 0 0 0 0 1 1 0 '\
        '0 0 1 0 1 1 1 '\
        '0 0 1 0 0 1 1 1 0 '\
        '0 0 1 0 1 1 1 0 0 0 0 1 1 1'

# 1/16 =0.0625

dur = (0.0625,0.0625,0.0625,0.0625,3.0/16,3.0/16,3.0/8,
    1/16.,1/16.,1/16.,1/16.,3/16.,3/16.,3/16.,1/16.,1/8.,
    1/16.,1/16.,1/16.,1/16.,1/4.,1/8.,1/8.,1/8.,1/8.,1/8.,1/8.,1/4.,1/4.,1/4.,
    1/16.,1/16.,1/16.,1/16.,3/16.,3/16.,3/8.,
    1/16.,1/16.,1/16.,1/16.,1/4.,1/8.,3/16.,1/16.,1/8.,
    1/16.,1/16.,1/16.,1/16.,1/4.,1/8.,3/16.,1/16.,1/8.,1/8.,1/8.,1/8.,1/8.,1/2.)


heptatonic = {
    "C":261.626
    ,"C#":277.183
    ,"Db":277.183
    ,"D": 293.665
    ,"D#":311.127
    ,"Eb":311.127
    ,"E": 329.628
    ,"F": 349.228
    ,"F#":369.994
    ,"Gb":369.994
    ,"G": 391.995
    ,"G#":415.305
    ,"Ab":415.305
    ,"A": 440.000
    ,"A#":466.164
    ,"Bb":466.164
    ,"B": 493.883
    ,"R":8
}

bpm = 114.0

def initializeGPIO():
    GPIO.setmode(GPIO.BCM)
    for pin in pins:
        GPIO.setup(pin, GPIO.OUT)


def start_buzzer(peizo):
    #peizo = GPIO.PWM(pins[1],100)
    for pin in pins:
        GPIO.output(pin,True)

    time.sleep(60/bpm)
    peizo.start(100)
    peizo.ChangeDutyCycle(90)

def play_note(peizo,note):
    frequency = heptatonic[note["pitch"]] * 2**note["octave"]
    duration = note["duration"] * 60/bpm * 4
    peizo.ChangeFrequency(frequency)
    time.sleep(duration)

def stop_buzzer(peizo):
    peizo.stop()

def main():
    print('Note executed at ' + time.strftime("%c"))
    print ('Press Ctrl+{0} to exit'.format('Break' if os.name == 'nt' else 'C'))
    try:
        initializeGPIO()
        peizo = GPIO.PWM(pins[1],100)
        start_buzzer(peizo)

        pitches = score.split()
        octaves = octave.split()

        for i in range(0, len(pitches)):
            note ={
                "pitch":pitches[i]
                ,"octave": int(octaves[i])
                ,"duration":dur[i]
            }
            print note["pitch"] + " " + str(note["duration"])
            frequency = heptatonic[note["pitch"]] * 2**note["octave"]
            duration = note["duration"] * 60/bpm * 4
            peizo.ChangeFrequency(frequency)
            time.sleep(duration)
            #play_note(peizo,note)

        stop_buzzer(peizo)
    except(KeyboardInterrupt, SystemExit):
        print ('Note terminated at ' + time.strftime("%c"))
    finally:
        GPIO.cleanup()



if __name__ == '__main__':
    main()