用从c++编写的串口通信程序，内有详细的了解并设置串口参数的源码，并含通信原理-prepared from the use of serial communication program, with detailed understanding of serial port parameters and set up the source code, and communication with Principle
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001403s ]
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:0.116986s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001175s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001194s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001052s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004310s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.024205s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.014775s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.020976s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001712s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 57414 [ RunTime:0.045353s ]
