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:0.002264s ]
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:0.091633s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002241s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001912s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002200s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003549s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002033s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003377s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015344s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002383s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 117907 [ RunTime:0.001574s ]
