测试单片机UART的程序，模块化非常好，稍加修改就可以作为应用层和底层模块之间的接口。-MCU UART test program, modular very good, with slight modifications can be used as application layer and the interface between the bottom of the module.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001183s ]
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:0.087826s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001983s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001114s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000953s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003151s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000825s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003848s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017703s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001100s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 205485 [ RunTime:0.015017s ]
