跑马灯代码(led跑马灯,每行代码的含义是什么)
大家好,今天小编来为大家解答跑马灯代码这个问题,led跑马灯,每行代码的含义是什么很多人还不知道,现在让我们一起来看看吧!
led跑马灯,每行代码的含义是什么
ORG
0000H
;开机上电主程序入口
AJMP
START
;系统一进来就转到主程序
ORG
0030H
;主程序地址
START:
MOV
A,
#0FFH
;主程序开始,A中初始化成全1
CLR
C
;c清零
MOV
R2,
#08H
;R2左转循环计数器
LOOP:
RLC
A
<<C+A+C<<带进位循环左移,A中的内容在8此循环中从0位到7位依次变0
MOV
P2,
A
;送到P2,使P2从0位到7位依次点亮LED
CALL
DELAY
;单片机运行很快,为了能看到灯的变化,必须延迟,把速度降下来
DJNZ
R2,
LOOP
;R2每次减1后判断是否=0,8次后=0程序才会下行,否则会跳回LOOP
MOV
R2,#07H
;R2右转循环计数器
LOOP1:
RRC
A
>>C+A+C>>带进位循环右移,A中的内容在8此循环中从7位到0位依次变0
MOV
P2,
A
;送到P2,使P2从7位到0位依次点亮LED
CALL
DELAY
;和上个循环一样,延时
DJNZ
R2,
LOOP1
;R2每次减1后判断是否=0,7次后=0程序才会下行,否则会跳回LOOP1
JMP
START
;跳回程序起始位置重复下一个循环
DELAY:
MOV
R3,
#20;延时子程序,这个应该不用解释了吧
D1:
MOV
R4,
#200
D2:
MOV
R5,
#248
DJNZ
R5,
$
DJNZ
R4,
D2
RET
END
急需一个连续不间断的跑马灯的代码
<script language="JavaScript">
var msg="跑马灯效果";
var speed= 300;
var msgud=""+ msg;
function titleScroll(){
if(msgud.length<msg.length) msgud+="-"+ msg;
msgud= msgud.substring(1, msgud.length);
document.title= msgud.substring(0, msg.length);
window.setTimeout("titleScroll()", speed);
}
</script>在使用的<body>中加入 onload='window.setTimeout("titleScroll()",500)'再加一段实现横向跑马灯效果的js代码:<html>
<body>
<div id=demon style="OVERFLOW: hidden; WIDTH: 1008px; HEIGHT: 167px">
<div id=demon1>
<table cellspacing=0 cellpadding=0 width=1008 border=0>
<tbody>
<tr>
<td>
<a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="" target=_blank><img height=50 alt=""
src="images/img34original.jpg" width=167 border=0></a>
</td>
<td>
<a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="" target=_blank><img height=50 alt=""
src="images/img35original.jpg" width=167 border=0></a>
</td>
<td>
<a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="" target=_blank><img height=50 alt=""
src="images/img36original.jpg" width=167 border=0></a>
</td>
<td>
<a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="" target=_blank><img height=50 alt=""
src="images/img295original.jpg" width=167 border=0></a>
</td>
<td>
<a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="" target=_blank><img height=50 alt=""
src="images/img62original.jpg" width=167 border=0></a>
</td>
<td>
<a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="" target=_blank><img height=50 alt=""
src="images/img63original.jpg" width=167 border=0></a>
</td>
<td>
<a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="" target=_blank><img height=50 alt=""
src="images/img64original.jpg" width=167 border=0></a>
</td>
<td>
<a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="" target=_blank><img height=50 alt=""
src="images/img202original.jpg" width=167 border=0></a>
</td>
<td>
<a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="" target=_blank><img height=50 alt=""
src="images/img203original.jpg" width=167 border=0></a>
</td>
<td>
<a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="" target=_blank><img height=50 alt=""
src="images/img204original.jpg" width=167 border=0></a>
</td>
<td>
<a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="" target=_blank><img height=50 alt=""
src="images/img205original.jpg" width=167 border=0></a>
</td>
<td>
<a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="" target=_blank><img height=50 alt=""
src="images/img206original.jpg" width=167 border=0></a>
</td>
<td id=demon2></td>
</tr>
</tbody>
</table>
</div>
</div>
</body>
<SCRIPT>
var speed1=1
demon2.innerHTML=demon1.innerHTML
function Marquee1(){
if(demon2.offsetWidth-demon.scrollLeft<=0)
demon.scrollLeft-=demon1.offsetWidth
else{
demon.scrollLeft++
}
}
var MyMar1=setInterval(Marquee1,speed1)
demon.onmouseover=function(){clearInterval(MyMar1)}
demon.onmouseout=function(){MyMar1=setInterval(Marquee1,speed1)}
</SCRIPT>
</html>再加一个实现纵向图片跑马灯效果的js代码:<div id=demon
style="OVERFLOW: hidden; WIDTH: 190px; HEIGHT: 575px">
<div id=demon1>
<table cellspacing=0 cellpadding=0 width=167 border=0>
<tbody>
<tr>
<td><a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href=""
target=_blank><img height=50 alt=""
src="images/img34original.jpg" width=167
border=0></a></td>
</tr>
<tr>
<td height=5></td>
</tr>
<tr>
<td><a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href=""
target=_blank><img height=50 alt=""
src="images/img35original.jpg" width=167
border=0></a></td>
</tr>
<tr>
<td height=5></td>
</tr>
<tr>
<td><a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href=""
target=_blank><img height=50 alt=""
src="images/img36original.jpg" width=167
border=0></a></td>
</tr>
<tr>
<td height=5></td>
</tr>
<tr>
<td><a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href=""
target=_blank><img height=50 alt=""
src="images/img295original.jpg" width=167
border=0></a></td>
</tr>
<tr>
<td height=5></td>
</tr>
其中的图片路径随具体情况改变, speed1代表滚动速度,越小越快!对于图片的宽度或高度,要跟div样式的宽或高搭配得当才能实现无限滚动!
跑马灯HTML源代码
1、<marquee>...</marquee>普通卷动
2、<marquee behavior=slide>...</marquee>滑动
3、<marquee behavior=scroll>...</marquee>预设卷动
4、<marquee behavior=alternate>...</marquee>来回卷动
5、<marquee direction=down>...</marquee>向下卷动
6、<marquee direction=up>...</marquee>向上卷动
7、<marquee direction=right></marquee>向右卷动
8、<marquee direction=’left’></marquee>向左卷动
9、<marquee loop=2>...</marquee>卷动次数
10、<marquee width=180>...</marquee>设定宽度
11、<marquee height=30>...</marquee>设定高度
12、<marquee bgcolor=FF0000>...</marquee>设定背景颜色
13、<marquee scrollamount=30>...</marquee>设定滚动速度
14、<marquee scrolldelay=300>...</marquee>设定卷动时间
15、<marquee onmouseover="this.stop()">...</marquee>鼠标经过上面时停止滚动
16、<marquee onmouseover="this.start()">...</marquee>鼠标离开时开始滚动
在网页中除了可显示常见的美国信息交换标准代码(外语缩写:ASCII)字符和汉字外,HTML还有许多特殊字符,它们一起构成了HTML字符集。
有2种情况需要使用特殊字符,一是网页中有其特殊意义的字符,二是键盘上没有的字符。
HTML字符可以用一些代码来表示,代码可以有2种表示方式。即字符代码(命名实体)和数字代码(编号实体)。
字符代码以“&”符开始,以分号";"结束,其间是字符名,如®。数字代码也以“&#”符开始,以分号";"结束,其间是编号,如®。
扩展资料
网站源码作为软件的特殊部分,可能被包含在一个或多个文件中。一个程序不必用同一种格式的源代码书写。例如,一个程序如果有C语言库的支持,那么就可以用C语言;而另一部分为了达到比较高的运行效率,则可以用汇编语言编写。
较为复杂的软件,一般需要数十种甚至上百种的源代码的参与。为了降低这种复杂度,必须引入一种可以描述各个源代码之间联系,并且如何正确编译的系统。在这样的背景下,修订控制系统(RCS)诞生了,并成为研发者对代码修订的必备工具之一。
还有另外一种组合:源代码的编写和编译分别在不同的平台上实现,专业术语叫做软件移植。
参考资料来源:百度百科-源码
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