在keil c环境下，应用软件模拟uart,以用较少的硬件资源来实现串口通信-the environment, application software simulation UART and using less hardware resources to achieve the serial communication
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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:0.089194s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001223s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001059s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001309s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 141003 [ RunTime:0.001321s ]
