from machine import PWM,Pin
import time 

#设置数码管显示的灯

dig1=Pin(23,Pin.OUT)
dig2=Pin(23,Pin.OUT)
dig3=Pin(23,Pin.OUT)
dig4=Pin(23,Pin.OUT)


#设置74HC595

DS=Pin(15,Pin.OUT)
STCP=Pin(2,Pin.OUT)#锁存器
SHCP=Pin(4,Pin.OUT)#时钟


num={
0:"11111111",
1:0x9f,
2:"11011010"
}
dig1.value(1)

temp=num.get(1)
for i in range(8):
  val=temp&1
  DS.value(val)
  SHCP.off()
  SHCP.on()
  temp=temp>>1
STCP.off
STCP.on()