树莓派 - MAX7219(数字倒计时) - python

写了个倒计时

#!/usr/bin/env python
# encoding: utf-8

import RPi.GPIO as GPIO
import time

DIN = 12
CS = 16
CLK = 18

GPIO.setmode(GPIO.BOARD)
GPIO.setup(DIN,GPIO.OUT)
GPIO.setup(CS,GPIO.OUT)
GPIO.setup(CLK,GPIO.OUT)

buffer0 = ['00011100','00100010','00100010','00100010','00100010','00100010','00100010','00011100'] #0
buffer1 = ['00011000','00001000','00001000','00001000','00001000','00001000','00001000','00011100'] #1
buffer2 = ['00011100','00100010','00100010','00000100','00001000','00010000','00100000','00111110'] #2
buffer3 = ['00011100','00100010','00000010','00001100','00000010','00000010','00100010','00011100'] #3
buffer4 = ['00000100','00001100','00010100','00100100','01000100','01111110','00000100','00000100'] #4
buffer5 = ['00111110','00100000','00100000','00111100','00000010','00000010','00100010','00011100'] #5
buffer6 = ['00011100','00100010','00100000','00111100','00100010','00100010','00100010','00011100'] #6
buffer7 = ['00111110','00100100','00000100','00001000','00001000','00001000','00001000','00001000'] #7
buffer8 = ['00011100','00100010','00100010','00011100','00100010','00100010','00100010','00011100'] #8
buffer9 = ['00011100','00100010','00100010','00100010','00011110','00000010','00100010','00011100'] #9
buffer = [buffer0,buffer1,buffer2,buffer3,buffer4,buffer5,buffer6,buffer7,buffer8,buffer9]

def send(byteData):
    for bit in range(0,8):
        if(byteData & 0x80):
            GPIO.output(DIN,True)
        else:
            GPIO.output(DIN,False)
        byteData = byteData<<1
        GPIO.output(CLK,True)
        GPIO.output(CLK,False)

def writeWord(addr,num):
    GPIO.output(CS,True)
    GPIO.output(CS,False)
    GPIO.output(CLK,False)
    send(addr)
    send(num)
    GPIO.output(CS,True)

def wt(index):
    for i in range(0,8):
        writeWord(i+1,int(buffer[index][i],2))

def initData():
    writeWord(0x09,0x00)
    writeWord(0x0a,0x03)
    writeWord(0x0b,0x07)
    writeWord(0x0c,0x01)
    writeWord(0xff,0x00)

try:
    initData()
    for i in range(0,10):
        wt(i)
        time.sleep(1)
except KeyboardInterrupt:
    pass

#time.sleep(2)
GPIO.cleanup()