一个单片机上的sd卡驱动程序，支持fat32，fat16等文件系统，很有参考价值。-A microcontroller on the sd card driver and support fat32, fat16 file system, etc., of great reference value.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002071s ]
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:0.086157s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002319s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003221s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001857s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003698s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001985s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003170s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014500s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002489s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 145215 [ RunTime:0.001343s ]
