Use of PWM

    For details on PWM, please refer to PWM-API Document.

    Instructions

    • Import PWM and Timer modules from machine
    from machine import Timer,PWM
    
    • Create Timer and PWM
    tim = Timer(Timer.TIMER0, Timer.CHANNEL0, mode=Timer.MODE_PWM)
    ch = PWM(tim, freq=500000, duty=50, pin=boad_info.LED_G)
    
    • Change the duty cycle, the set pin will output waveforms with different duty cycles
    ch.duty(duty)
    

    Example

    Control the brightness of LED_G

    from machine import Timer,PWM
    import time
    from board import board_info
    from fpioa_manager import fm
    
    tim = Timer(Timer.TIMER0, Timer.CHANNEL0, mode=Timer.MODE_PWM)
    ch = PWM(tim, freq=500000, duty=50, pin=boad_info.LED_G)
    duty=0
    dir = True
    while True:
        if dir:
            duty += 10
        else:
            duty -= 10
        if duty>100:
            duty = 100
            dir = False
        elif duty<0:
            duty = 0
            dir = True
        time.sleep(0.05)
        ch.duty(duty)