s3c44b0,USB HOST实验，插入U盘或其他USB设备，会从串口打印出相关信息。-s3c44b0, USB HOST experiment, the U-insert or other USB devices, from the serial print out relevant information.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002051s ]
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:0.145444s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001807s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003325s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001847s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.006275s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001595s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006066s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017790s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001361s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 319028 [ RunTime:0.001287s ]
