8点基二fft
Fast Fourier Transform (FFT).
Using 8 points, takes about 1.2 ms to execute one FFT.
Sets up General Purpose Timer 1 to generate events at 10 kHz.
Will produce 10 kHz output on T1PWM and T1PWM pins.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000943s ]
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:0.102635s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001075s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001219s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000943s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003235s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001185s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006782s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015391s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001150s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 575154 [ RunTime:0.016114s ]
