这是一个pc与avr通过D12进行USB通讯的简单实例，功能就是控制PORTC口.-This is a pc with avr through D12 USB communications simple example, PORTC function is to control the population.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001383s ]
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:0.093340s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001253s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001237s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003634s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001081s ]
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SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014849s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001356s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 202053 [ RunTime:0.001270s ]
