from machine import Pin, PWM
import time

# Frequency for each note in Hertz
note_freq = {
    'C4': 262,
    'D4': 294,
    'E4': 330,
    'F4': 349,
    'G4': 392,
    'A4': 440,
    'B4': 494,
    'C5': 523,
    'D5': 587,
    'E5': 659,
    'F5': 698,
    'G5': 784,
    'A5': 880,
    'B5': 988,
}

# Song melody and note durations in seconds
# This is a simplified and partial melody from "Last Christmas"
# Each tuple represents (note, duration)
melody = [
    ('G4', 0.5), ('G4', 0.5), ('G4', 0.5), ('A4', 0.5),
    ('F4', 0.5), ('E4', 0.5), ('D4', 0.5),
    ('E4', 0.5), ('G4', 0.5), ('F4', 0.5), ('D4', 0.5),
    ('C4', 0.5), ('G4', 0.5), ('F4', 0.5), ('D4', 0.5),
    ('E4', 0.5), ('C5', 0.5), ('A4', 0.5), ('G4', 0.5),
    ('F4', 0.5), ('D4', 0.5), ('E4', 0.5), ('G4', 0.5),
]

# Setup PWM on a specified pin (e.g., GP15)
buzzer = PWM(Pin(15))

# Play the melody
for note, duration in melody:
    freq = note_freq.get(note, 0)  # Get frequency for the note
    if freq > 0:
        buzzer.freq(freq)  # Set the frequency
        buzzer.duty_u16(32768)  # Set duty cycle to 50%
        time.sleep(duration)  # Play for the specified duration
    buzzer.duty_u16(0)  # Silence between notes
    time.sleep(0.1)  # Brief pause between notes

# Turn off the buzzer
buzzer.deinit()