time_daoji.h

very useful to pactising ps2 keyboard

bit time_daoji_enable;                       //倒计时使能信号
unsigned char time_daoji_min;                        //倒计时分钟信号，倒计时在一个小时以内                       
unsigned char time_daoji_sec;                        //
unsigned char time_daoji_miaobijiao;                   //秒比较信号，用于分析时钟信号是否变化，变化则倒减一

unsigned char time_daoji_min01;                                             
unsigned char time_daoji_min02;
unsigned char time_daoji_sec01;                                             
unsigned char time_daoji_sec02;   

unsigned char dongtai_001;             //用于产生动态冒号，计数用