此程序是RFID中使用的一种CRC16校验原理，采用了移位法，查表法做好后再上传。此外，下载解压后要把文件后缀名改为.c ！-This procedure is the use of RFID as a CRC16 checksum principle, the use of the displacement method, look-up table method to do a good job and then upload. In addition, the downloaded file to extract the suffix after the name change. C!
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002021s ]
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:0.090132s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002512s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002268s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002308s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004047s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002036s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003426s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016035s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002721s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 110183 [ RunTime:0.001442s ]
