该文档包含了基于c8051f020的各种源码，包括AD、DA，串口，定时器，IIC以及时钟键盘等，很具有学习意义-This document contains a variety of source-based c8051f020, including AD, DA, serial port, timers, IIC and clock keyboard, it is with learning the meaning
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001264s ]
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:0.090788s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001241s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001157s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003741s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000991s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003298s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014976s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001330s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 227629 [ RunTime:0.001310s ]
