说明：  通过配置DS1302芯片来实现实时时钟的监测，我们通过通过控制2个按键来选择我们要在数码管上显示的时间，按下按键1我们来显示周几，按下按键2来显示年月日，不按显示时分秒，这样显示复合我们的数字表的显示
(By configuring DS1302 chip to monitor the real-time clock, we select the time that we want to display on the digital tube by controlling 2 keys. Press key 1 to show the week, press the key 2 to show the year and month, not according to the display time, so that the display of the display of the display of our digital table.)