单片机的标准液晶屏驱动程序。单片机为P89C52，语言为C，液晶屏为LCD1602，编程环境为KEIL C。-MCU standard LCD driver. Microcontroller P89C52, for the C language, LCD screen for LCD1602, the programming environment for C KEIL.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001040s ]
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:0.060976s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001078s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001242s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000921s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003076s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000798s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003635s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014036s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001102s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 117907 [ RunTime:0.014267s ]
