自编的C51串口通讯程序,在AT89C51上测试运行OK,用22.1M晶振最高可跑115KBPS-directed the C51 serial communications procedures, the AT89C51 OK on the test run, with a maximum 22.1M crystal run 115KBPS
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001957s ]
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:0.151951s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001826s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003148s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001846s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.006315s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001570s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005741s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.025436s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002100s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 319505 [ RunTime:0.001560s ]