使用树莓派的PWM LED

Question

执行此代码时，我希望得到的指示灯变亮，但我得到的指示灯变暗。真的会很感激

import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BOARD)
GPIO.setup(11,GPIO.OUT)
dc=0
LED=GPIO.PWM(11,100)
LED.start(dc)
while 0<=dc<=100:
   dc+=1
   if 0<=dc<=100:
       LED.ChangeDutyCycle(dc)
       time.sleep(0.01)