基于C8051F340的SD卡读写，移植了FATFS的文件系统。可以实现文件的读写。本人验证通过，可对有文件系统的SD进行读写。-Based on C8051F340" s SD card reader, transplant FATFS the file system. File read and write can be achieved. I verified by, a file system can read and write SD.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001764s ]
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:0.092686s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001187s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001870s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001182s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003767s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002146s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003918s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017188s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.004392s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 280445 [ RunTime:0.141808s ]
