摘要:本文主要介绍以CPLD 芯片进行十字路口的交通灯的设计,用CPLD 作为交通灯控制器的主控芯片,采用VHDL
语言编写控制程序,利用CPLD的可重复编程和在动态系统重构的特性,大大地提高了数字系统设计的灵活性和通用性。
关键词:CPLD;VHDL;交通灯控制器
中图分类号:TP39
Abstract :This paper introduces the electronic-traffic lamp, which is based on the VHDL and is com
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001260s ]
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:0.086873s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001103s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001320s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000967s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003319s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000926s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005232s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015203s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001164s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 488512 [ RunTime:0.014580s ]