本代码为本人基于汇编语言的51单片机课程上机考试程序。;实验要求;利用P1/P2口或8255的接口电路和实验台上提供的六个数码管显示，设计一个电子钟，;电子钟设计如下格式 XX XX XX由左向右分别为时、分、秒;本人采用定时器溢出中断确定时间基准，main函数对共阴数码管进行动态扫描;p1口作为位选信号输出端;P2口作为段选信号输出端
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001039s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.093631s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.005133s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001917s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001622s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005417s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001187s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007389s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.019824s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001198s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 199465 [ RunTime:0.044045s ]
