请教关于4位数据线LCD1602编程的问题 [复制链接]

[quote=radiolee]多谢！我是en，rs，rw乱填的，呵呵。等下试试[/quote呵呵，谢谢了

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估计不难，可能程序上有小错误。
我们不懂的问题，可能是某些人“不屑”的问题 [表情]

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跑原版demo程序，如图，计算机cpu占用100%

原来问题竟然是出在一个低级错误上了。

我写的程序是在明浩的8bit程序上改写的，问题是明浩写的这个8bit程序存在了一个潜在的大bug，在8bit时看不出来，4bit时就有问题了。

建议贴个8bit和4bit的最小系统demo版！最好每句能加上注释，非常感谢！

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我们不懂的问题，可能是某些人“不屑”的问题 [表情]

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感谢！！　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

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建议贴个8bit和4bit的最小系统demo版！最好每句能加上注释，非常感谢！

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4bit的我在我的网页上帖出来了，请看：

http://www.bestcfan.net/blogview.asp?logid=229

搞得我也要学单片机了......好玩....

报告一下，在xp sp2英文版下，无论keil 8.01还是keil 7.50(uv2)在run的时候都会cpu占用100%，不知道大家的xp是不是也这样

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4bit的我在我的网页上帖出来了，请看：
http://www.bestcfan.net/blogview.asp?logid=229

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很遗憾，测试也没有通过，偶是pic16f877 + 1602

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很遗憾，测试也没有通过，偶是pic16f877 + 1602

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人家那是51用的程序

建议你找找7rc,他的那个频率计是用4bit,16f84的,
源码也许对你有参考
只是那个源码是汇编的

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各位老大，偶最近用c语言写一个pic16f877a向lcd送数据的程序，显示屏用的是广议电子的1602a，根据长沙的那个数据手册（老实说这个手册很烂很烂！），编写了8位数据线方式的程序，没有问题。改成4位的就不可以，不是不显示就是乱码，实在高不懂问题出在哪里？
  网上流传着多种多样的说法，比如长沙的，要求送玩前三个38h之后，就要检测忙，而别的资料说初始化过程中都不能检测忙，不知道谁说得对？试过之后好像谁说的也不多。
  很多朋友说吧初始化的38改成28，然后分两次送就行了，呵呵。。。。。这样的话偶已经看到有99遍了，那位朋友能提供一个详细的操作流程？最好能有一个经过验证的例程，谢谢啦！
  因为我是从8位方式改的，所以低四位数据线没有拆，实际上是用8位数据线，只用其中的高4位，不知道是不是这个原因？

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我做过hc08的4bit液晶，驱动也是从8bit上移植过来的，好像是上电复位的时候要送一个专门的4bit指令，然后工作的时候就吧所有的数据全部一分为二，送两次就行了。

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人家那是51用的程序
建议你找找7rc,他的那个频率计是用4bit,16f84的,
源码也许对你有参考
只是那个源码是汇编的

'
build target 'target 1'
assembling 1602.asm...
c:\keil\c51\inc\reg52.h(13): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(14): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(15): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(16): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(17): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(18): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(19): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(20): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(21): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(22): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(23): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(24): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(25): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(26): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(27): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(28): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(29): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(30): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(31): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(32): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(33): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(45): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(46): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(47): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(48): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(49): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(50): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(51): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(54): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(55): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(56): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(57): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(58): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(59): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(60): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(61): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(64): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(66): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(67): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(68): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(69): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(70): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(74): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(75): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(76): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(77): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(78): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(81): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(82): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(83): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(84): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(85): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(86): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(87): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(88): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(91): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(92): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(93): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(94): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(95): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(96): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(97): error a10: attempt to define an already defined symbol
c:\keil\c51\inc\reg52.h(98): error a10: attempt to define an already defined symbol
1602.asm(40): error a9: syntax error
1602.asm(41): error a9: syntax error
1602.asm(42): error a9: syntax error
1602.asm(43): error a9: syntax error
1602.asm(44): error a9: syntax error
1602.asm(45): error a9: syntax error
1602.asm(46): error a9: syntax error
1602.asm(47): error a9: syntax error
1602.asm(48): error a9: syntax error
1602.asm(49): error a9: syntax error
1602.asm(51): error a9: syntax error
1602.asm(51): error a3: illegal character
1602.asm(51): error a3: illegal character
1602.asm(51): error a3: illegal character
1602.asm(51): error a3: illegal character
1602.asm(52): error a9: syntax error
1602.asm(52): error a3: illegal character
1602.asm(52): error a3: illegal character
1602.asm(52): error a3: illegal character
1602.asm(52): error a3: illegal character
1602.asm(53): error a9: syntax error
1602.asm(53): error a3: illegal character
1602.asm(53): error a3: illegal character
1602.asm(53): error a3: illegal character
1602.asm(53): error a3: illegal character
1602.asm(54): error a9: syntax error
1602.asm(54): error a3: illegal character
1602.asm(54): error a3: illegal character
1602.asm(54): error a3: illegal character
1602.asm(54): error a3: illegal character
1602.asm(55): error a9: syntax error
1602.asm(55): error a3: illegal character
1602.asm(55): error a3: illegal character
1602.asm(55): error a3: illegal character
1602.asm(55): error a3: illegal character
1602.asm(57): error a9: syntax error
1602.asm(58): error a9: syntax error
1602.asm(59): error a9: syntax error
1602.asm(60): error a9: syntax error
1602.asm(61): error a9: syntax error
1602.asm(63): error a9: syntax error
1602.asm(64): error a9: syntax error
1602.asm(65): error a9: syntax error
1602.asm(66): error a9: syntax error
1602.asm(67): error a9: syntax error
1602.asm(69): error a9: syntax error
1602.asm(70): error a9: syntax error
1602.asm(71): error a9: syntax error
1602.asm(74): error a9: syntax error
1602.asm(75): error a9: syntax error
1602.asm(76): error a9: syntax error
1602.asm(77): error a9: syntax error
1602.asm(78): error a9: syntax error
1602.asm(79): error a9: syntax error
1602.asm(80): error a9: syntax error
1602.asm(81): error a9: syntax error
1602.asm(82): error a9: syntax error
1602.asm(84): error a9: syntax error
1602.asm(86): error a9: syntax error
1602.asm(87): error a9: syntax error
1602.asm(88): error a9: syntax error
1602.asm(89): error a9: syntax error
1602.asm(92): error a9: syntax error
1602.asm(93): error a9: syntax error
1602.asm(94): error a21: expression with forward reference not permitted
1602.asm(94): error a45: undefined symbol (pass-2)
1602.asm(219): error a56: unbalanced if-endif controls
1602.asm(219): warning a41: missing 'end' statement
target not created

'

人家那是51用的程序
建议你找找7rc,他的那个频率计是用4bit,16f84的,
源码也许对你有参考
只是那个源码是汇编的

'


哦，我不是用它的程序，是用它的指令，他用51发什么指令，我就用pic发什么指令，但是还是通不过

他那个频率计好像不是用的1601或者1602，估计指令不兼容

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build target 'target 1'
assembling 1602.asm...
c:\keil\c51\inc\reg52.h(13): error a10: attempt to define an already defined symbol
……
1602.asm(94): error a21: expression with forward reference not permitted
1602.asm(94): error a45: undefined symbol (pass-2)
1602.asm(219): error a56: unbalanced if-endif controls
1602.asm(219): warning a41: missing 'end' statement
target not created

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我这是c源程序啊，你用asm编译当然不行了

各位老大，又有问题了，我的877+1602的程序，上电初始化过程特别长啊！
把判断忙改成延时也不行！但如果不断电的时候，把片子拿下再插上的时候，初始化就很快，估计是液晶屏上电初始化慢，搞不懂为什么？接电后得等近2分钟屏才正常，换了2个1602都一样，搞不懂啦！

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各位老大，又有问题了，我的877+1602的程序，上电初始化过程特别长啊！
把判断忙改成延时也不行！但如果不断电的时候，把片子拿下再插上的时候，初始化就很快，估计是液晶屏上电初始化慢，搞不懂为什么？接电后得等近2分钟屏才正常，换了2个1602都一样，搞不懂啦！

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最近我也用1602，我们探讨探讨吧！见qq