在微机上模拟I2C总线的设计中,用并行口的D0(PIN2)模拟SCL信号,用D1(PIN3)模拟SDA信号。根据IIC总线的电平规范
-Computer simulation on the design of I2C bus with a parallel port D0 (PIN2) Analog SCL signal, with D1 (PIN3) Analog signal SDA. According to the IIC bus specification level
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001271s ]
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:0.113312s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.019579s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.026761s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.014841s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.010436s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002861s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.009002s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015935s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.004377s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 154218 [ RunTime:0.012020s ]