该例程为数码管显示可调且可定时钟表，注意晶振需为11.0592M。

若为其他数值晶振，请合理改变TH0与TL0参数值，否则计时会有很大误差 。-The routine for the digital display is adjustable and can be timed watches, crystal need to pay attention to 11.0592M. For other values ​ ​ crystal, please change the TH0 and TL0 reasonable parameter values, otherwise there will be great timing error.