Example PWM: MarioBros



  • Code to play MarioBros with buzzer. To try PWM pin

    #Based on http://wiki.micropython.org/Play-Tone
    import time
    from machine import Pin,  PWM
    
    # define frequency for each tone
    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
    
    # set up pin PWM timer for output to buzzer or speaker
    buz = Pin("P10") # Pin Y2 with timer 8 Channel 2
    tim = PWM(0, frequency=300)
    ch = tim.channel(2, duty_cycle=0.5, pin=buz)
    
    # play all tone
    note = [B0, C1, CS1, D1, DS1, E1, F1, FS1, G1, GS1, A1, AS1, B1, C2, CS2, D2, DS2, E2, F2, FS2, G2, GS2, A2, AS2, B2, C3, CS3, D3, DS3, E3, F3, FS3, 
    G3, GS3, A3, AS3, B3, C4, CS4, D4, DS4, E4, F4, FS4, G4, GS4, A4, AS4, B4, C5, CS5, D5, DS5, E5, F5, FS5, G5, GS5, A5, AS5, B5, C6, CS6, D6, 
    DS6, E6, F6, FS6, G6, GS6, A6, AS6, B6, C7, CS7, D7, DS7, E7, F7, FS7, G7, GS7, A7, AS7, B7, C8, CS8, D8, DS8]
    
    
    #for i in note:
    #    print(i)
    #    tim=PWM(0, frequency=i)
    #    ch.duty_cycle(0.30)
    #    time.sleep(0.3)
    
    
    mario = [E7, E7, 0, E7, 0, C7, E7, 0, G7, 0, 0, 0, G6, 0, 0, 0, C7, 0, 0, G6, 0, 0, E6, 0, 0, A6, 0, B6, 0, AS6, A6, 0, G6, E7, 0, G7, A7, 0, F7, G7, 0, E7, 0,C7, D7, B6, 0, 0, C7, 0, 0, G6, 0, 0, E6, 0, 0, A6, 0, B6, 0, AS6, A6, 0, G6, E7, 0, G7, A7, 0, F7, G7, 0, E7, 0,C7, D7, B6, 0, 0]
    
    # play Mario Bros tone example
    # source from here http://www.linuxcircle.com/2013/03/31/playing-mario-bros-tune-with-arduino-and-piezo-buzzer/
    for i in mario:
        if i == 0:
            ch.duty_cycle(0)
        else:
            tim=PWM(0, frequency=i)  # change frequency for change tone
            ch.duty_cycle(0.50)
        time.sleep(0.150)
    

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