1602液晶显示屏不按程序显示

看你的程序感觉很费劲，呵呵，我发一个我的程序给你吧！

#include<reg52h>

#define uchar unsigned char

#define uint unsigned int

sbit dula=P2^6;

sbit wela=P2^7;

sbit rs=P3^5;

sbit lcden=P3^4;

sbit s1=P3^0;

sbit s2=P3^1;

sbit s3=P3^2;

sbit rd=P3^7;

uchar count,s1num;

char miao,shi,fen;

uchar code table[]=" 2007-7-30 MON";

uchar code table1[]=" 00:00:00";

void delay(uint z)

{

uint x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}

void write_com(uchar com)

{

rs=0;

lcden=0;

P0=com;

delay(5);

lcden=1;

delay(5);

lcden=0;

}

void write_date(uchar date)

{

rs=1;

lcden=0;

P0=date;

delay(5);

lcden=1;

delay(5);

lcden=0;

}

void init()

{

uchar num;

dula=0;

wela=0;

lcden=0;

// fen=59;

// miao=53;

// shi=23;

write_com(0x38);

write_com(0x0c);

write_com(0x06);

write_com(0x01);

write_com(0x80);

for(num=0;num<15;num++)

{

write_date(table[num]);

delay(5);

}

write_com(0x80+0x40);

for(num=0;num<12;num++)

{

write_date(table1[num]);

delay(5);

}

TMOD=0x01;

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

EA=1;

ET0=1;

TR0=1;

}

void write_sfm(uchar add,uchar date)

{

uchar shi,ge;

shi=date/10;

ge=date%10;

write_com(0x80+0x40+add);

write_date(0x30+shi);

write_date(0x30+ge);

}

void keyscan()

{

rd=0;

if(s1==0)

{

delay(5);

if(s1==0)

{ s1num++;

while(!s1);

if(s1num==1)

{

TR0=0;

write_com(0x80+0x40+10);

write_com(0x0f);

}

}

if(s1num==2)

{

write_com(0x80+0x40+7);

}

if(s1num==3)

{

write_com(0x80+0x40+4);

}

if(s1num==4)

{

s1num=0;

write_com(0x0c);

TR0=1;

}

}

if(s1num!=0)

{

if(s2==0)

{

delay(5);

if(s2==0)

{

while(!s2);

if(s1num==1)

{

miao++;

if(miao==60)

miao=0;

write_sfm(10,miao);

write_com(0x80+0x40+10);

}

if(s1num==2)

{

fen++;

if(fen==60)

fen=0;

write_sfm(7,fen);

write_com(0x80+0x40+7);

}

if(s1num==3)

{

shi++;

if(shi==24)

shi=0;

write_sfm(4,shi);

write_com(0x80+0x40+4);

}

}

}

if(s3==0)

{

delay(5);

if(s3==0)

{

while(!s3);

if(s1num==1)

{

/ if(miao==0)

{

miao=59;

write_sfm(10,miao);

write_com(0x80+0x40+10);

}/

miao--;

if(miao==-1)

miao=59;

write_sfm(10,miao);

write_com(0x80+0x40+10);

}

if(s1num==2)

{

fen--;

if(fen==-1)

fen=59;

write_sfm(7,fen);

write_com(0x80+0x40+7);

}

if(s1num==3)

{

shi--;

if(shi==-1)

shi=23;

write_sfm(4,shi);

write_com(0x80+0x40+4);

}

}

}

}

}

void main()

{

init();

while(1)

{

keyscan();

}

}

void timer0() interrupt 1

{

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

count++;

if(count==18)

{

count=0;

miao++;

if(miao==60)

{

miao=0;

fen++;

if(fen==60)

{

fen=0;

shi++;

if(shi==24)

{

shi=0;

}

write_sfm(4,shi);

}

write_sfm(7,fen);

}

write_sfm(10,miao);

}

}

希望能帮助你，呵呵

这个是1602内部结构决定的，你只需要在初始化的时候先设置三次显示，然后再设置你的其他要求。

芯片厂家推荐的用法：

INT:

MOV

A,#30H

MOV

DATR,#CW_ADD

MOV

R2,#03H

INT1:

MOVX

@DPTR,A

CALL

DELAY

DJNZ

R2,INT1

这上面就是1602对于51单片机推荐的初始化之前加的三次模式设置

简单！！ 工作流程：（具体的看程序，但个人认为差不多是这样） 1、通过按键设置输出电压值，通过LCD1602显示电压值,然后单片机端口输出设定的数据，最后DAC将数字电压转换为模拟电流，电流通过运放转为电压，通过示波器测试电压。

给你推荐一本书《MCS51单片机应用设计》哈尔滨工业大学出版社，里面很详细的

#include "reg52h"

#include "intrinsh"

unsigned char text1[] = "TTT TTTT add:qhd" ;

unsigned char text2[] = "TEL:13333333333 " ;

sbit RS = P2^0;

sbit RW = P2^1;

sbit EN = P1^2;

void delay_ms(unsigned char t);

void init_1602(void);

void write_command(unsigned char cmd);

void write_data(unsigned char dat);

void dsp_onechar(unsigned char pos,unsigned char c);

void dsp_string(unsigned char line,unsigned char p,unsigned char length);

void main(void)

{

init_1602();

delay_ms(15);

dsp_string(0,text1,16);

dsp_string(1,text2,16);

while(1);

}

void delay_ms(unsigned char t)//毫秒延时大约延时1ms

{

unsigned char i;

while(t--)

{

for(i=0;i<112;i++);

}

}

void write_command(unsigned char cmd)//写指令函数（按规定RS=0，RW=0为写指令）

{

delay_ms(5); // check busy flag

EN = 0;

RS = 0;

RW = 0;

_nop_();

EN = 1;

P0 = cmd;

EN = 0;

}

void write_data(unsigned char dat)//往1602写数据

{

delay_ms(5); //busy flag check

EN = 0;

RS = 1;

RW = 0;

_nop_();

EN = 1;

P0 = dat;

EN = 0;

RS = 0;

}

void dsp_onechar(unsigned char pos,unsigned char c)//写一个字节函数

{

unsigned char p;

if (pos>=0x10)

p=pos+0xb0;

else

p=pos+0x80;

write_command(p);

write_data(c);

}

void dsp_string(unsigned char line,unsigned char p,unsigned char length)

{

unsigned char l,i;

l=line<<4;

for (i=0;i<length;i++)

dsp_onechar(l++,(p+i));

}

void init_1602(void)//1602初始化

{

delay_ms(15);

write_command(0x38);

write_command(0x38);

write_command(0x38);

write_command(0x06);

write_command(0x0c);

write_command(0x01);

}

这是为你量身制作的，希望你能喜欢，光标根据按键在数字下面闪烁，一定符合你的要求，给你截了一张效果图

#include<reg52h>

#include<intrinsh>

#define uchar unsigned char

#define uint unsigned int

#define ulong unsigned long

uchar code table[]="1602";

sbit key1=P1^0;

sbit key2=P1^1;

sbit key3=P1^2;

sbit key4=P1^3;

sbit rs=P2^0;

sbit rw=P2^1;

sbit en=P2^2;

void delay(uint z)

{

uint x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}

void write_com(uchar com)

{

rs=0;

rw=0;

en=0;

P0=com;

delay(5);

en=1;

delay(5);

en=0;

}

void write_dat(uchar dat)

{

rs=1;

rw=0;

en=0;

P0=dat;

delay(5);

en=1;

delay(5);

en=0;

}

void init()

{

uchar i;

write_com(0x38);

write_com(0x0c);

write_com(0x06);

write_com(0x01);

write_com(0x86);

for(i=0;i<4;i++)

{

write_dat(table[i]);

delay(5);

}

}

void main()

{

init();

while(1)

{

if(key1==0)

{

delay(10);

if(key1==0)

{

while(key1==0);

write_com(0x86);

write_com(0x0f);

}

}

if(key2==0)

{

delay(10);

if(key2==0)

{

while(key2==0);

write_com(0x87);

write_com(0x0f);

}

}

if(key3==0)

{

delay(10);

if(key3==0)

{

while(key3==0);

write_com(0x88);

write_com(0x0f);

}

}

if(key4==0)

{

delay(10);

if(key4==0)

{

while(key4==0);

write_com(0x89);

write_com(0x0f);

}

}

}

}

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