用ATMEL公司的S52内部定时器测量脉冲频率，范围从0.5Hz到30KHz，该程序已经调试成功，可以直接运用。-ATMEL Corporation with the S52 internal timer pulse measurement frequency range from 0.5 Hz to 30KHz, the debugging procedure has been successful, can be directly used.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001400s ]
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:0.101640s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001363s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002037s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001465s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003699s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001197s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004871s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014977s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001550s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 311882 [ RunTime:0.001460s ]
