频率计介绍了用VHDL语言编写的频率计的程序，详细编写了如何测频，如何计数频率。-Cymometer introduce VHDL language with the frequency of the procedure in detail how to prepare a frequency measurement, how to count the frequency.
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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:0.064958s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001071s ]
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