是用51的IO模拟SPI口和CH374通讯，完成对U盘的读写，优点是占用系统资源少！-With 51 analog IO port and SPI communication CH374, U disk to complete the reading and writing, the advantage of occupying less system resources!
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001444s ]
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:0.094129s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001271s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001231s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003560s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001061s ]
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SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014892s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001447s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 248375 [ RunTime:0.001257s ]
