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📄 [原创]轻松搞定液晶lcd1602--天空遨游.htm

📁 一个1602lcd的开发资料
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                                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 
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                                style="COLOR: #000000"></SPAN></SPAN></SPAN>&nbsp;</DIV>
                                <DIV class=MsoNormal 
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                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000">以下例子釆用ATMEGA16</SPAN></SPAN></SPAN></DIV>
                                <DIV class=MsoNormal 
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                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; 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 
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                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000"></SPAN></SPAN></SPAN>&nbsp;</DIV><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; 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&nbsp; PORTD&nbsp;&nbsp; </DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt">#define 
                                LCD_DDR&nbsp;&nbsp; DDRD&nbsp;&nbsp;&nbsp; 
</DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt">#define 
                                LCD_PIN&nbsp;&nbsp; PIND</DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><BR>#define 
                                RS&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0 
                                </SPAN></SPAN></SPAN></DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000">#define 
                                EN&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
                                1</SPAN></SPAN></SPAN></DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000">#define 
                                LCD_DATA&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
                                ((1&lt;&lt;4)|(1&lt;&lt;5)|(1&lt;&lt;6)|(1&lt;&lt;7)) 
                                </SPAN></SPAN></SPAN></DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000"></SPAN></SPAN></SPAN>&nbsp;</DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000">#define&nbsp;SETBIT(x,y)&nbsp;&nbsp; 
                                (x|=(1&lt;&lt;y))&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
                                //set bit y in byte 
                                x<BR>#define&nbsp;CLRBIT(x,y)&nbsp;&nbsp; 
                                (x&amp;=(~(1&lt;&lt;y)))&nbsp;&nbsp; //clear bit 
                                y in byte 
                                xx</SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000"></SPAN></SPAN></SPAN></SPAN></SPAN></SPAN>&nbsp;</DIV><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; 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)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
                                //1us延时函数<BR>&nbsp; {<BR>&nbsp;&nbsp; 
                                asm("nop");<BR>&nbsp; }</DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt">void 
                                delay_nus(unsigned int 
                                n)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //N 
                                us延时函数<BR>&nbsp; {<BR>&nbsp;&nbsp; unsigned int 
                                i=0;<BR>&nbsp;&nbsp; for 
                                (i=0;i&lt;n;i++)<BR>&nbsp;&nbsp; 
                                delay_1us();<BR>&nbsp; }<BR>&nbsp; <BR>void 
                                delay_1ms(void)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
                                //1ms延时函数<BR>&nbsp; {<BR>&nbsp;&nbsp; unsigned 
                                int i;<BR>&nbsp;&nbsp; for 
                                (i=0;i&lt;1140;i++);<BR>&nbsp; }<BR>&nbsp; 
                                <BR>void delay_nms(unsigned int 
                                n)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; //N 
                                ms延时函数<BR>&nbsp; {<BR>&nbsp;&nbsp; unsigned int 
                                i=0;<BR>&nbsp;&nbsp; for 
                                (i=0;i&lt;n;i++)<BR>&nbsp;&nbsp; 
                                delay_1ms();<BR>&nbsp; }</DIV>
                                <DIV class=MsoNormal style="MARGIN-LEFT: 18pt">
                                <HR>
                                </DIV></SPAN></SPAN></SPAN></SPAN></SPAN></SPAN>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000"></SPAN></SPAN></SPAN>&nbsp;</DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; 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; FONT-FAMILY: 宋体; 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; FONT-FAMILY: 宋体; 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; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000"></SPAN></SPAN></SPAN><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; 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; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000">&nbsp;delay_nus(16);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
                                //delay</SPAN></SPAN></SPAN></DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000"></SPAN></SPAN></SPAN>&nbsp;</DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; 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; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000">&nbsp;CLRBIT(LCD_PORT,RS);&nbsp; 
                                //RS=0</SPAN></SPAN></SPAN></DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000"></SPAN></SPAN></SPAN>&nbsp;</DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000">&nbsp;SETBIT(LCD_PORT,E);&nbsp;&nbsp; 
                                //E=1</SPAN></SPAN></SPAN></DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000"></SPAN></SPAN></SPAN><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000">&nbsp;LCD_PORT&amp;=0X0f;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
                                //清高四位<BR>&nbsp;LCD_PORT|=com&amp;0xf0;&nbsp;&nbsp; 
                                //写高四位</SPAN></SPAN></SPAN></DIV>
                                <DIV class=MsoNormal 
                                style="MARGIN-LEFT: 18pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN 
                                style="FONT-SIZE: 12pt; COLOR: #000000"><SPAN 
                                style="COLOR: #000000">&nbsp;CLRBIT(LCD_PORT,E);&nbsp;&nbsp; 
                                //E=0</SPAN></SPAN></SPAN></DIV><SPAN
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