from machine import Pin, PWM
from utime import sleep
buzzer = PWM(Pin(15))

tones = {
"B0": 31, 
"C1": 33, "CS1": 35, "D1": 37, "DS1": 39, "E1": 41, "F1": 44, "FS1": 46, "G1": 49,
"GS1": 52, "A1": 55, "AS1": 58, "B1": 62, "C2": 65, "CS2": 69, "D2": 73, "DS2": 78,
"E2": 82, "F2": 87, "FS2": 93, "G2": 98, "GS2": 104, "A2": 110, "AS2": 117, "B2": 123,
"C3": 131, "CS3": 139, "D3": 147, "DS3": 156, "E3": 165, "F3": 175, "FS3": 185,
"G3": 196, "GS3": 208, "A3": 220, "AS3": 233, "B3": 247, "C4": 262, "CS4": 277,
"D4": 294, "DS4": 311, "E4": 330, "F4": 349, "FS4": 370, "G4": 392, "GS4": 415,
"A4": 440, "AS4": 466, "B4": 494, "C5": 523, "CS5": 554, "D5": 587, "DS5": 622,
"E5": 659, "F5": 698, "FS5": 740, "G5": 784, "GS5": 831, "A5": 880, "AS5": 932,
"B5": 988, "C6": 1047, "CS6": 1109, "D6": 1175, "DS6": 1245, "E6": 1319, "F6": 1397,
"FS6": 1480, "G6": 1568, "GS6": 1661, "A6": 1760, "AS6": 1865, "B6": 1976, "C7": 2093,
"CS7": 2217, "D7": 2349, "DS7": 2489, "E7": 2637, "F7": 2794, "FS7": 2960, "G7": 3136,
"GS7": 3322, "A7": 3520, "AS7": 3729, "B7": 3951, "C8": 4186, "CS8": 4435,  "D8": 4699,
"DS8": 4978
}

#  天上太阳红彤彤 (Red Sun in the Sky) by 屠洪刚 (Tu Honggang)
#  MIDI disponible en https://onlinesequencer.net/2766856
red_sun = ["E6","E6","E6","G6","E6","G6","E6","C6","A5","A5","A5","E6",
            "C6","E6","C6","A5","A5","G5","A5","C6","D6","E6","E6","C6",
            "C6","A5","G5","G5","A5","A5","C6","C6","C6",
            "C5","C5","A4","A4","C5","C5","A4","A4","C5","A4","C5","G5","E5",
            "E5","E5","E5","E5","C5","A4","A4","C5","F5","E3","E3","G5","E5",
            "G5","C3","B4","A4","A4","A4","A4","A4",]
#  solo usa uno de los instrumentos

#  playtone() hace que se emita un pulso PWM a la frecuencia que se
#  ingresa como argumento con un ciclo util de 1000/65536, al emitir
#  ese pulso a través de un buzzer se emitirá un sonido

def playtone(frequency):
    buzzer.duty_u16(1000)
    buzzer.freq(frequency)

#  bequiet() hace que se emita un pulso PWM de ciclo útil 0, o sea,
#  que será de 0V y a través de un buzzer no emitirá sonido alguno,
#  generando un silencio

def bequiet():
    buzzer.duty_u16(0)

#  playsong() recorrerá una lista de notas y las reproducirá con una
#  pausa de 200 ms entre cada nota. Si la pauta encuentra una "P",
#  se reproducirá un silencio.
def playsong(mysong):
    for i in range(len(mysong)):
        if (mysong[i] == "P"):
            bequiet()
        else:
            playtone(tones[mysong[i]])
        sleep(0.2)
    bequiet()
    
playsong(red_sun)