📄 5_自制单片机之五（1）……lcd1602的驱动_边学边秀单片机.htm
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<TD class=cnt style="PADDING-LEFT: 20px"><SPAN class=date>2007-08-25 15:20
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<DIV class=desc
style="OVERFLOW: hidden; WORD-BREAK: normal">我用下载线下程序，引脚按照电路图
都连好了，例如P1.7——1；P1.6-3；RES-5；P1.5-9；GND-2；VCC-4；GND-10，S51晶振连好了
，20，31，40脚也都连了，使得是聂忠强的ISplay下载软件，就是邪不进去，有可能是什么原因？
我msn是ysuweili@163.com,可随时告知</DIV></TD></TR></TBODY></TABLE>
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<TD class=cnt style="PADDING-LEFT: 20px"><SPAN class=date>2007-11-26 18:52
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<DIV class=desc
style="OVERFLOW: hidden; WORD-BREAK: normal">我按照你的说明做了一下。我C学的不好，都是用汇编。1602那个程序我运行的时候不能显示啊？这是我能用的显示A的程序<BR>RS
EQU P2.0 <BR><BR>RW EQU P2.1 <BR><BR>E EQU P2.2 <BR><BR>ORG 0000H
<BR><BR>MOV P0,#00000001B ;清屏 <BR><BR>ACALL ENABLE <BR><BR>MOV
P0,#00000001B ;清屏 <BR><BR>ACALL ENABLE <BR><BR>MOV P0,#00111000B ;显示功能
<BR><BR>ACALL ENABLE <BR><BR>MOV P0,#00001111B ;显示开关控制 <BR><BR>ACALL
ENABLE <BR><BR>MOV P0,#00000110B ;输入模式 <BR><BR>ACALL ENABLE <BR><BR>MOV
P0,#0C0H ;数据存贮器地址 <BR><BR>ACALL ENABLE <BR><BR>mov p0,#01000001b ;ASCII码
<BR><BR>SETB RS <BR><BR>CLR RW <BR><BR>CLR E <BR>ACALL DELAY <BR><BR>SETB
E <BR><BR>AJMP $ <BR><BR>ENABLE: CLR RS ;送命令 <BR><BR>CLR RW <BR><BR>CLR E
<BR><BR>ACALL DELAY <BR><BR>SETB E <BR><BR>RET <BR><BR>DELAY: MOV P0,#0FFH
<BR><BR>CLR RS <BR><BR>SETB RW <BR><BR>CLR E <BR><BR>NOP <BR><BR>SETB E
<BR><BR>JB P0.7,DELAY ;判断忙标志 <BR><BR>RET <BR><BR>END
<BR>请帮忙看看问题出在什么地方啊。谢谢</DIV></TD></TR></TBODY></TABLE>
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<TD class=cnt style="PADDING-LEFT: 20px"><SPAN class=date>2007-11-28 14:30
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<DIV class=desc
style="OVERFLOW: hidden; WORD-BREAK: normal">做的不错，加油！！</DIV></TD></TR></TBODY></TABLE>
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<TD class=cnt style="PADDING-LEFT: 20px"><SPAN class=date>2007-11-29 17:52
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<DIV class=desc
style="OVERFLOW: hidden; WORD-BREAK: normal">你好，发现你指令介绍里面第四个中的B错了，正好说反了</DIV></TD></TR></TBODY></TABLE>
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<TD class=cnt style="PADDING-LEFT: 20px"><SPAN class=date>2008-04-07 22:43
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<DIV class=desc
style="OVERFLOW: hidden; WORD-BREAK: normal">你的"检查忙函数"中,须去掉该语句LCD_DB=0xff;有了该语句时,<BR>LCD_DB^7始终为1,就跳不出循环,所以通不过<BR></DIV></TD></TR></TBODY></TABLE>
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<TD class=cnt style="PADDING-LEFT: 20px"><SPAN class=date>2008-04-07 22:44
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<DIV class=desc
style="OVERFLOW: hidden; WORD-BREAK: normal">你的"检查忙函数"中,须去掉该语句LCD_DB=0xff;有了该语句时,<BR>LCD_DB^7始终为1,就跳不出循环,所以通不过</DIV></TD></TR></TBODY></TABLE>
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<TD class=cnt style="PADDING-LEFT: 20px"><SPAN class=date>2008-04-09 09:14
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<DIV class=desc
style="OVERFLOW: hidden; WORD-BREAK: normal">回答匿名网友:你好！我看过那段程序了。那句LCD_DB=0xff是为了将IO口置高电平释放掉。而下面的while(LCD_DB^7==1)是从数据线上读取，看看第七位是不是低电平，如果不是则继续循环等待。如第七位是低电平，说明LCD_1602已空闲。<BR><BR>因为这些数据线和硬件连着的。虽然我前面一句将LCD_DB设为0xFF。但如果LCD_1602模块如果空闲，它会将数据线LCD_DB第七位置0的。这和你做纯软件的变量设置是不同的。<BR></DIV></TD></TR></TBODY></TABLE>
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<TD class=cnt style="PADDING-LEFT: 20px"><SPAN class=date>2008-05-04 21:17
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<DIV class=desc
style="OVERFLOW: hidden; WORD-BREAK: normal">写的好，谢谢～</DIV></TD></TR></TBODY></TABLE>
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