单片机控制步进电机加减速C语言源程序，通过不断改变定时器的定时初值来提高频率。-Single-chip stepper motor control acceleration and deceleration C language source program, by changing the timing timer to improve the frequency of the initial value.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002007s ]
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:0.087715s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002529s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001993s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002181s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003806s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002032s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003377s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016374s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002535s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 147891 [ RunTime:0.001230s ]
