#例4-6 LED点阵显示器
#依次显示“ZHCPT 23AI1”
import max7219-matrix8x8
from machine import Pin,SPI
from time import sleep

#定义SPI对象及片选
spi = SPI(0,baudrate=10000000,polarity=1,phase=0,sck=Pin(2),mosi=Pin(3)) 
ss = Pin(5,Pin.OUT)

#显示信息字符串
msg='ZHCPT 23AI1'
length = len(msg)	    # 字符个数	
length = (length*8)	    #字符位数:8bit/char

#定义MAX7219对象:1块8*8
display = max7219-matrix8x8(spi,ss,1)
display.brightness(10)      # adjust brightness 1 to 15 
display.fill(0) 
display.show( ) 
sleep(0.5)

while True:
    for x in range(32,-length,-1):
        display.text(msg,x,0,1) 
        display.show() 
        sleep(0.10) 
        display.fill(0)