非常详细地分析了linux下串口通信的程序，有具体的方法思路以及完整的源代码。-A very detailed analysis of serial communication under linux procedures. And there is a specific way of thinking, as well as complete source code.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001048s ]
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:0.081026s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001181s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001230s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001038s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003252s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000885s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003946s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.031326s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001431s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 158501 [ RunTime:0.018463s ]
