单片机串口程序，可以通过keil编译，实现一台主机和多台从机的通信，从机挂接同一条总线,主机对通信有决定权 -MCU procedures, Keil compiler can achieve a host and multiple communications from the plane, from the plane with an articulated bus, the mainframe has the right to decide Communications
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001332s ]
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:0.093150s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001293s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001987s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001286s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003707s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001102s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003250s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015953s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001457s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 107641 [ RunTime:0.001216s ]
