芯片at89s52，在上面完成一些如led 点阵 PS键盘 串口 等基本操作 对于初学51的有参考价值-Chip at89s52, in the above example, the completion of some led dot matrix keyboard PS serial basic operation such as 51 for the beginner has reference value
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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:0.088296s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002379s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002220s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002461s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 269721 [ RunTime:0.001110s ]
