RgbLedPwm.py 文件源码

def color_test(channel, frequency, speed, step):
    p = GPIO.PWM(channel, frequency)
    p.start(0)
    PulseWidthMods.append(p)
    while True:
        for dutyCycle in range(0, 101, step):
            p.ChangeDutyCycle(dutyCycle)
            time.sleep(speed)
        for dutyCycle in range(100, -1, -step):
            p.ChangeDutyCycle(dutyCycle)
            time.sleep(speed)