单片机的同步/异步通信，包括发送部分程序、接收部分程序、主控制程序，针对不同单片机，有着极高的学习意义-Single-chip synchronous/asynchronous communication, including sending some of the procedures, to receive some of the procedures, the main control program, for different single-chip, has a very high significance of the study
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001385s ]
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:0.083075s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000983s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001084s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001000s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.002989s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000812s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004018s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014482s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001048s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 158628 [ RunTime:0.014622s ]
