# 通过电位器控制三个LED
from machine import Pin, ADC
from time import sleep

potPin = 28
redLED = 13
yellowLED = 14
blueLED = 15

myPot = ADC(potPin)
myRed = Pin(redLED, Pin.OUT)
myYellow = Pin(yellowLED, Pin.OUT)
myBlue = Pin(blueLED, Pin.OUT)


while True:
    potVal = myPot.read_u16()
    # 实际电位器的最小值，以实物为准
    realMin = 0
    # 实际电位器的最大值，以实物为准
    realMax = 65535
    # 需求的范围最小值
    mustMin = 0
    # 需求的范围最大值
    mustMax = 100
    # 计算真实电压比率值
    voltage = (mustMax/realMax)*potVal-(realMin*mustMax/realMax)
    print(voltage)
    sleep(.1)

    if voltage < 80:
        myRed.value(1)
        myYellow.value(0)
        myBlue.value(0)
    elif voltage >= 80 and voltage<95:
        myRed.value(0)
        myYellow.value(1)
        myBlue.value(0)
    elif voltage >= 95:
        myRed.value(0)
        myYellow.value(0)
        myBlue.value(1)