📄 液晶lcd1602_我心飞翔.htm
字号:
LETTER-SPACING: normal
}
#usrbar A:link {
LETTER-SPACING: normal
}
#usrbar A:visited {
LETTER-SPACING: normal
}
#ft {
LETTER-SPACING: normal
}
#ft A {
LETTER-SPACING: normal
}
#ft A:link {
LETTER-SPACING: normal
}
#ft A:visited {
LETTER-SPACING: normal
}
</STYLE>
<DIV id=usrbar><NOBR><A href="http://www.baidu.com/" target=_blank>百度首页</A> | <A
id=hi_index href="http://hi.baidu.com/" target=_blank>百度空间</A>
<SCRIPT type=text/javascript>
document.write('| <a href="http://passport.baidu.com/?login&tpl=sp&tpl_reg=sp&u=http://hi.baidu.com' + encodeURI('/landence/blog/item/e49851459b27b923cffca395%2Ehtml') + '">登录</a>');
</SCRIPT>
</NOBR></DIV>
<DIV id=main align=left><!--[if IE]>
<SCRIPT>
var objmain = document.getElementById("main");
function updatesize(){ var bodyw = window.document.body.offsetWidth; if(bodyw <= 790) objmain.style.width="772px"; else if(bodyw >= 1016) objmain.style.width="996px"; else objmain.style.width="100%"; }
updatesize(); window.onresize = updatesize;
</SCRIPT>
<![endif]-->
<DIV id=header>
<DIV class=lc>
<DIV class=rc></DIV></DIV>
<DIV class=tit><A class=titlink title="landence的空间 http://hi.baidu.com/landence"
href="http://hi.baidu.com/landence">我心飞翔</A></DIV>
<DIV class=desc>从这里记下生活中的点点滴滴，记下所感所悟。</DIV>
<DIV id=tabline></DIV>
<DIV id=tab><A href="http://hi.baidu.com/landence">主页</A><A class=on
href="http://hi.baidu.com/landence/blog">博客</A><A
href="http://hi.baidu.com/landence/album">相册</A><SPAN>|</SPAN><A
href="http://hi.baidu.com/landence/profile">个人档案</A> <SPAN>|</SPAN><A
href="http://hi.baidu.com/landence/friend">好友</A> </DIV></DIV>
<DIV class=stage>
<DIV class=stagepad>
<DIV style="WIDTH: 100%">
<TABLE class=modth cellSpacing=0 cellPadding=0 width="100%" border=0>
<TBODY>
<TR>
<TD class=modtl width=7> </TD>
<TD class=modtc noWrap>
<DIV class=modhead><SPAN class=modtit>查看文章</SPAN></DIV></TD>
<TD class=modtc noWrap align=right></TD>
<TD class=modtr width=7> </TD></TR></TBODY></TABLE>
<DIV class=modbox id=m_blog>
<DIV class=tit>液晶LCD1602</DIV>
<DIV class=date>2008-05-02 00:52</DIV>
<TABLE style="TABLE-LAYOUT: fixed">
<TBODY>
<TR>
<TD>
<DIV class=cnt id=blog_text>
<TABLE class="seyle4 FCK__ShowTableBorders" cellSpacing=0 cellPadding=0
width="100%" border=0>
<TBODY>
<TR>
<TD vAlign=center><STRONG
style="FONT-SIZE: 14px">液晶LCD1602</STRONG></TD></TR>
<TR>
<TD>
<DIV align=right></DIV></TD></TR></TBODY></TABLE>
<TABLE class=FCK__ShowTableBorders cellSpacing=0 cellPadding=0
width="100%" border=0>
<TBODY>
<TR>
<TD height=3></TD></TR></TBODY></TABLE>
<TABLE class=FCK__ShowTableBorders style="TABLE-LAYOUT: fixed"
cellSpacing=0 cellPadding=0 width="100%" align=center border=0>
<TBODY>
<TR>
<TD><SPAN class=oblog_text><SPAN style="FONT-SIZE: 12pt">
<P align=left><SPAN
style="FONT-SIZE: 12pt">首先你要了解LCD1602的工作时序,只有真正了解了,你才可以应用自如</SPAN></P><SPAN
style="FONT-SIZE: 12pt">
<DIV>
<HR>
</DIV>
<DIV>
<HR>
</DIV>
<DIV>部分引脚功能：</DIV>
<DIV></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN><IMG
style="CURSOR: pointer; ZOOM: 180%" height=55
src="液晶LCD1602_我心飞翔.files/70635.42468725.jpg" width=300
resized="true"></SPAN></SPAN></DIV><SPAN
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">信号真值表:<SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><IMG
style="CURSOR: pointer; ZOOM: 220%" height=98
src="液晶LCD1602_我心飞翔.files/70790.06318308.jpg" width=300
resized="true"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">
<HR>
</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">由此可得：</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">一、写指令函数</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">void
write_com(unsigned char com)</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">{</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">R/W=0; //0：写</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">RS=0; //0：指令</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">E=1;
//<SPAN style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">下降沿
<SPAN
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">写数据</SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">LCD_DATA_PIN=com;</SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">E=0;</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">}</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">二、写数据函数</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">void
write_data(unsigned char data)</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">{</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">R/W=0; //0：写</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">RS=1; //1：函数</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">E=1;
//<SPAN style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">下降沿
<SPAN
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">写数据</SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">LCD_DATA_PIN=data;</SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">E=0;</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">}</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">
<HR>
</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 14pt"><SPAN
style="FONT-SIZE: 14pt">指</SPAN>令集</SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 14pt"><IMG style="CURSOR: pointer; ZOOM: 200%"
height=78 src="液晶LCD1602_我心飞翔.files/70903.88515513.jpg" width=300
resized="true"></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 14pt"><IMG style="CURSOR: pointer; ZOOM: 210%"
height=117 src="液晶LCD1602_我心飞翔.files/70950.92285157.jpg" width=300
resized="true"></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 14pt"><IMG style="CURSOR: pointer; ZOOM: 200%"
height=115 src="液晶LCD1602_我心飞翔.files/70930.25548692.jpg" width=300
resized="true"></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">
<HR>
</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">
<HR>
</DIV>
<DIV class=MsoNormal
style="MARGIN-LEFT: 18pt">由上面那些资料我们就可以写出驱动LCD1602的程序，下面我一一讲解：</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt" align=left><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt">由LCD1602</SPAN>指令集的<SPAN
style="COLOR: #000000">功能设置我们可知它有两种驱动模式8位数据接口驱动和四位数据接口。</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">由于AVR单片机IO口有限我就讲四位数据接口驱动模式，由于我们很少读LCD1602里面的数据所以我们可以<SPAN
style="COLOR: #ff0000">把</SPAN><SPAN
style="FONT-SIZE: 12pt; COLOR: #ff4500; mso-bidi-font-size: 10.0pt"><SPAN
style="COLOR: #ff0000">R/W</SPAN><SPAN style="COLOR: #000000"><SPAN
style="COLOR: #ff0000">引脚直接下拉到地</SPAN>，使LCD1602一直处于写状态，没了读状态，判断不了busy情况,只能用延时来等一下，这样又可以省一个IO口，所以</SPAN></SPAN>共用六个IO口。</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">以下例子釆用ATMEGA16</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">Crystal: 8.0000Mhz</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">定义端口：</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><BR>#define LCD_PORT
PORTD </DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">#define
LCD_DDR DDRD </DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">#define
LCD_PIN PIND</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><BR>#define
RS 0</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">#define
EN
1</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">#define
LCD_DATA
((1<<4)|(1<<5)|(1<<6)|(1<<7))
</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">#define SETBIT(x,y)
(x|=(1<<y)) //set bit y in byte
x<BR>#define CLRBIT(x,y)
(x&=(~(1<<y))) //clear bit y in byte
xx</SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">
<HR>
</DIV>
<DIV class=MsoNormal
style="MARGIN-LEFT: 18pt">延时函数我就不多说了，直接写出来</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">void
delay_1us(void)
//1us延时函数<BR>{<BR> asm("nop");<BR>}</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">void
delay_nus(unsigned int n) //N
us延时函数<BR>{<BR> unsigned int i=0;<BR> for
(i=0;i<n;i++)<BR> delay_1us();<BR>}<BR><BR>void
delay_1ms(void)
//1ms延时函数<BR>{<BR> unsigned int i;<BR> for
(i=0;i<1140;i++);<BR>}<BR><BR>void delay_nms(unsigned int
n) //N
ms延时函数<BR>{<BR> unsigned int i=0;<BR> for
(i=0;i<n;i++)<BR> delay_1ms();<BR>}</DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt">
<HR>
</DIV></SPAN></SPAN></SPAN></SPAN></SPAN></SPAN>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">设置所需函数</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">一、写指令函数<SPAN
style="COLOR: #ff0000">(四线模式数据要分两次写)</SPAN></SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">void write_command(unsigned char
com)</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">{</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">delay_nus(16);
//delay</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">CLRBIT(LCD_PORT,RS);
//RS=0</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">SETBIT(LCD_PORT,E);
//E=1</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
style="COLOR: #000000">LCD_PORT&=0X0f;
//清高四位<BR>LCD_PORT|=com&0xf0;
//写高四位</SPAN></SPAN></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000; mso-bidi-font-size: 10.0pt"><SPAN
style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -