摩托车的步进电机驱动。用的是LPC900系列单片机的RTC定时器，虽然简单，但足以说明问题。-motorcycle stepper motor driver. The LPC900 Series is the RTC timer, although simple, but enough to illustrate the problem.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001759s ]
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:0.142744s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001667s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003184s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001681s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005447s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001539s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005858s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.025034s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001989s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 293987 [ RunTime:0.001650s ]
