at89x51.txt

用AT89c51驱动cm12864-12显示

 #include <AT89X51.H>
#include<intrins.h>
sbit  E=P2^5;
sbit  RS=P2^7;
sbit  RW=P2^6;
unsigned char j=0;
unsigned char yb=0x80;
unsigned char code name00[]={"飞射白鹿雪连天，"};
unsigned char code name01[]={"笑书神侠倚碧鸳。"};
unsigned char code name02[]={"自古英雄多奇逸，"};
unsigned char code name03[]={"金老挥毫尽使然。"};
unsigned char code name10[]={"李白乘舟将欲行，"};
unsigned char code name11[]={"忽闻岸上踏歌声。"};
unsigned char code name12[]={"桃花潭水深千尺，"};
unsigned char code name13[]={"不及汪伦送我情。"};
unsigned char code name20[]={"this is a 12864 "};
unsigned char code name21[]={"display program,"};
unsigned char code name22[]={"welcome to commu"};
unsigned char code name23[]={"nicate with me! "};

void delay(unsigned char tt)//延时1ms
{
   unsigned char j;
   while(tt--)
    {
   for(j=0;j<125;j++)
    {;}
 }
}
void wr_com(unsigned char value)//写指令，写指令时必须为RS=0;RW=0;
{
 E=0;
 RS=0;
 RW=0;
 delay(1);
 P0=value;
 E=1;
 delay(2); //如果没有延时就必须要加查忙指令
 E=0;
}
void wr_data(unsigned char sj)//写数据，写数据时必须为 RS=1;RW=0;
{
 E=0;
 RS=1;
 RW=0;
 P0=sj;
 E=1;
 delay(1);//如果没有延时就必须要加查忙指令
 E=0;
}
void reset (void)
{
 wr_com(0x01);//清屏
 wr_com(0x08);//关显示
 wr_com(0x03);//归位
 wr_com(0x30);//功能设置
 wr_com(0x0f);//开显示
 wr_com(0x01);//清屏
}
//****************
//outChinese 为函数名
//place 为显示地址的首地址
//unit  字符长度
//charcode[]  要显示数据的内容
void outChinese(unsigned char place,unsigned char unit,unsigned char charcode[] )
{
 unsigned char i;
 wr_com(place);
 for(i=0;i<unit*2;i++)//一个汉字为两个字符
 {wr_data(charcode[i]);}
}
void outchar(unsigned char place,unsigned char unit,unsigned char charcode[] )
{
 unsigned char i;
 wr_com(place);
 for(i=0;i<unit;i++)
 {wr_data(charcode[i]);}
}
void ydgb(void)
{
  wr_com(yb);//显示光标位置
  if(P1_0==0)
  {
   delay(10);
   if(P1_0==0)
   {
    yb=yb+0x01;
 if(yb==0x88){yb=0x90;}
 if(yb==0x97){yb=0x88;}
 if(yb==0x8f){yb=0x98;}
 if(yb==0xa0){yb=0x80;}
   }
   while(P1_0==0);
  }
}
void display1(void)
{
 ydgb();
 outChinese(0x80,8,name00);//第一行：80-87H
 outChinese(0x90,8,name01);//第二行：90-97H
 outChinese(0x88,8,name02);//第三行：88-8FH
 outChinese(0x98,8,name03);//第四行：98-9FH
 //outchar(0x9f,2,name4);
}
void display2(void)
{
 ydgb();
 outChinese(0x80,8,name10);
 outChinese(0x90,8,name11);
 outChinese(0x88,8,name12);
 outChinese(0x98,8,name13);
}
void display3(void)
{
 ydgb();
 outchar(0x80,16,name20);
 outchar(0x90,16,name21);
 outchar(0x88,16,name22);
 outchar(0x98,16,name23);
}
void main(void)
{
 reset();
 while(1)
 {
  ydgb();
  if(P1_1==0)
  {
   delay(10);
   if(P1_1==0)
   {
    j++;
 ydgb();
 wr_com(0x01);//清屏
 if(j==3){j=0;}
   }
   while(P1_1==0);
  }
  switch(j)
  {
   case 0:display1();break;
   case 1:display2();break;
   case 2:display3();break;
  }
 }
}