带字库的lcd12864液晶驱动c51程序 -

标题: 带字库的lcd12864液晶驱动c51程序 [打印本页]

作者: hongniu 时间: 2015-6-23 23:50
标题: 带字库的lcd12864液晶驱动c51程序
#include<reg52.h>

#include<stdlib.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar xian,flag;
uint time=0;
#define Lcd_data P0
sbit RS  =  P2^6;          //（数据命令）寄存器选择输入
sbit RW  =  P2^5;          //液晶读/写控制
sbit EN  =  P2^7;          //液晶使能控制
sbit PSB =  P3^2;          //串/并方式控制

uchar code dis1[]={" 长恨歌 "};
uchar code dis2[]={"在天愿作比翼鸟"};
uchar code dis3[]={"在地愿为连理枝"};
uchar code dis4[]={"自古多情空余恨"};
uchar code dis5[]={"此恨绵绵无绝期"};

void delay(uint x)
{
uint i,j;
for(i=x;i>0;i--)
   for(j=110;j>0;j--);
}

//写指令到LCD
void write_com(uchar com)
{
RS=0;
RW=0;
EN=0;
P0=com;
delay(1);
EN=1;
delay(1);
EN=0;
}

//写指令到LCD
void write_data(uchar dat)
{
   RS=1;
   RW=0;
   EN=0;
   P0=dat;
   delay(1);
   EN=1;
   delay(1);
   EN=0;
}

void lcd_pos(uchar X,uchar Y)
{
   uchar pos;
   if(X==0)X=0x80;
   else if(X==1)X=0x90;
   else if(X==2)X=0x88;
   else if(X==3)X=0x98;
   pos=X+Y;
   write_com(pos);
}

void display(uchar p[],uchar a)
{
   uchar*display1;
   display1=p;
   lcd_pos(a,0);
   while((*display1)!='\0')
   {
   write_data(*display1);
   display1++;
   }
}

void init()
{
   TMOD=0x02;
   EA=1;
   ET0=1;
   TH0=6;
   TL0=6;
   TR0=1;
   time=0;
   xian=0;
}

void lcd_init()
{
PSB=1;//并口方式
write_com(0x30); //设置8位数据
delay(5);
write_com(0x0c);//显示开，光标关
delay(5);
write_com(0x01); //清除显示内容
delay(5);
}

main()
{
   init();
   delay(10);
   lcd_init();
   while(1)
   {
   switch(xian)
{
      case 0:display(dis1,0); break;
case 1:display(dis2,1); break;
case 2:display(dis3,2); break;
case 3:display(dis4,3); break;
case 4:display(dis5,0); break;goto a;
default:break;
}
}
a:
while(1);
}

void timer0() interrupt 1
{
   time++;
   if(time==4000)
   {
      time=0;
   xian++;
      if(xian==5)xian=0;
   }
}

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