单片机与PC机串口程序，pc机用串口调试工具发送16进制数据到单片机，单片机再返回一个接受到的信号回pc机，-SCM and PC serial port procedures, PCs with serial debugging tools to send 16-band data to a single chip, the microcontroller return to a finer signal to PCs,
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002054s ]
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:0.089949s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002302s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002046s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002299s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003732s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002460s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003400s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015184s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002592s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 109819 [ RunTime:0.001170s ]
