C51单片机实现对PC键盘的读取与显示 具体细节请参考源程序 将时钟线接入外部中断 数据线接入普通I/O输入输出口-C51 MCU to read the PC keyboard and display details please refer to the source clock line access external interrupt data lines access I/O input and output mouth
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001274s ]
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:0.100951s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001168s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001882s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001181s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003586s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000996s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003247s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015815s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001306s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 308132 [ RunTime:0.003387s ]
