一个简单实用的单片机键盘扫描程序。键盘为4*4扫描的键盘，通过行列扫描进行键码判断，并通过串行口或者485信号输出键码。应用于银行系统。-A simple and practical single-chip microcomputer keyboard scanner. 4* 4 keyboard for keyboard scanning, scan through the ranks to determine the key code and, through the serial port or a key code signal output 485. Applies to the banking system.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.003637s ]
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:0.084920s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001033s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001214s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001033s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003051s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000910s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003938s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015618s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001173s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 273021 [ RunTime:0.020449s ]
