from machine import Pin, PWM
import time

# Define the buzzer pin
buzzer = PWM(Pin(16))

# Dictionary mapping notes to their frequencies
notes = {
    'C4': 261,
    'D4': 294,
    'E4': 329,
    'F4': 349,
    'G4': 392,
    'A4': 440,
    'B4': 493,
    'C5': 523
}

# Function to play a tone
def play_tone(frequency, duration):
    buzzer.freq(frequency)
    buzzer.duty_u16(32768)  # Set duty cycle to 50%
    time.sleep(duration)
    buzzer.duty_u16(0)  # Turn off the buzzer

# Function to play a melody
def play_melody(melody, tempo):
    for note, duration in melody:
        if note == 'R':  # Rest note
            time.sleep(duration * tempo)
        else:
            play_tone(notes[note], duration * tempo)
            time.sleep(0.1 * tempo)  # Short pause between notes

# Define a melody (Twinkle Twinkle Little Star)
melody = [
    ('C4', 0.5), ('C4', 0.5), ('G4', 0.5), ('G4', 0.5),
    ('A4', 0.5), ('A4', 0.5), ('G4', 1.0),
    ('F4', 0.5), ('F4', 0.5), ('E4', 0.5), ('E4', 0.5),
    ('D4', 0.5), ('D4', 0.5), ('C4', 1.0)
]

# Set the tempo (speed of the melody)
tempo = 0.5  # You can adjust this value to make the melody faster or slower

# Play the melody
try:
    play_melody(melody, tempo)
except KeyboardInterrupt:
    buzzer.deinit()  # Clean up the buzzer on exit