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window.clipboardData.setData("Text",url); alert("复制成功,请粘贴到你的QQ/MSN上推荐给你的好友"); }//--> </script><a href="javascript:copyUrl('求:EDA VHDL 交通灯程序,高手来帮我啊!!!!!!\nhttp://bbs.zdnet.com.cn/viewthread.php?tid=99103')"><img src="images/copy.gif" border="0"></a> </div><h1>求:EDA VHDL 交通灯程序,高手来帮我啊!!!!!!</h1><div id="message234137" class="t_msgfont">求:EDA VHDL 交通灯程序,高手来帮我啊!!!!!! 要求: A 方向为主干道,B 为支干道。分设红(R),黄(Y),绿(G),和左拐(L)。1表示灯亮,0表示灯灭。四灯的亮的顺序和时间长短为:A 方向:绿灯(40秒)-->黄灯(5秒)-->左拐灯(15秒)-->黄灯(5秒)-->红灯(55秒)。B 方向:红灯(65秒)-->绿灯(30秒)-->黄灯(5秒)-->左拐灯(15秒)-->黄灯(5秒)。时间要想改变只要改变计数器的预知数即可。 信号定义和说明: CLK :步时钟 EN :使能信号,为1,则控制器开始工作 LAMPA[3:0]:控制A方向的4盏灯的亮灭;其中LAMPA(0)到LAMPA(3)分别控制A方向的左拐灯,绿灯,黄灯和红灯。 LAMPB[3:0]:控制B方向的4盏灯的亮灭;其中LAMPB(0)到LAMPB(3)分别控制B方向的左拐灯,绿灯,黄灯和红灯。 ACOUNT[7:0]:用于A方向的交通灯的时间显示,宽8位,可驱动2个数码管。 BCOUNT[7:0]:用于B方向的交通灯的时间显示,宽8位,可驱动2个数码管。 上面是我毕业设计中的一部分。希望高手们帮帮我,给我做出来,谢谢了!!!</div><br><font style="color: #333333; font: 12px Tahoma, Verdana"></font><script language=javascript>document.body.oncopy=function(){event.returnValue=false;var t=document.selection.createRange().text;var s="本贴来自ZDNetChina中文社区 http://bbs.zdnet.com.cn ,本贴地址:http://bbs.zdnet.com.cn/viewthread.php?tid=99103";clipboardData.setData('Text','\r\n'+t+'\r\n'+s+'\r\n\r\n\r\n\r\n');}</script></td></tr><tr><td align="right"><a href="###" onclick="scroll(0,0)"><img src="images/default/top.gif" border="0" alt="顶部" /></a></td></tr></table></td></tr></table></div></form></div><div class="maintable" style="clear:both"><table width="98%" cellspacing="0" cellpadding="0" align="center"><tr><td valign="top"></td><td width="40%" align="right">
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