/*=======================================================20×4字符液晶主程序,编译软件(ICCAVR_6.31)CPU内部晶振8M数据线B0
51单片机的12864液晶字符显示,采用液晶的并行接法#includereg52.h>#includeintrins.h>#includestdlib.h>#defineucharu
8液晶背光控制includereg52h>includestdioh>includeintrinsh>unsignedinthour,minute,second,count;sbit