main.py 文件源码

def fader_loop(self):

        FADER_MAX_STEP = 5
        FADER_DELAY = 0.005

        fader = PWM(Pin(15))
        fader_cur_val = 0

        while True:

            if self.fader_target_val > fader_cur_val:
                step = min(FADER_MAX_STEP, self.fader_target_val - fader_cur_val)
            elif self.fader_target_val < fader_cur_val:
                step = -min(FADER_MAX_STEP, fader_cur_val - self.fader_target_val)
            else:
                step = 0

            fader_cur_val += step
            fader.duty(fader_cur_val)

            await asyncio.sleep(FADER_DELAY)