st7920.c

st7920 并口 成功显示 有图 有文字 上下屏

//12864并行接口参考程序，控制器st7920  
#include <reg51.h>
#include <intrins.h>

#define uchar unsigned char
#define uint unsigned int

//12864 汉字显示模块 与MCU连接

sbit RS = P1^0;// 1:输入数据 ；0:输入命令
sbit RW = P1^1;//1:读数据  0:写数据
sbit E = P1^2;
sbit PSB = P1^3 ; //串并口选择 1:并口模式; 0:串口模式;
sbit rst=P1^4;
#define  LcdData P0
#define comm  0
#define dat   1
#define x1    0x80
#define x2    0x88
#define y     0x80
uchar code tab5[]={
/*--  调入了一幅图像：F:\梁\画图\COCK.bmp  --*/
/*--  宽度x高度=128x64  --*/
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};
void delay(unsigned int t)	;
bit Check_Busy()			 ;
void wait()					  ;
void Lcd_Reset()			   ;
void hzDisp1();
void wr_lcd(uchar dat_comm,uchar content);
void img_disp(uchar code *img);
//延时子程序
void delay(unsigned int t)
{  unsigned int i,j;
   for(i=0;i<t;i++)
      for(j=0;j<10;j++);
         
}
//测试LCD忙
bit Check_Busy()
{
    bit busy;
    RS = 0;
    RW = 1;
    E = 1;
      _nop_(); 
    busy = (bit)(LcdData&0x80);
    E = 0;
    return busy;
}
//等待LCD到空闲
void wait()
{
    while(Check_Busy());
}

//写指令代码
void wr_lcd(uchar dat_comm,uchar content)
{

  	wait();
  	if(dat_comm)
   	{
    	RS = 1;   //data
    	RW = 0;   //write
   	}
  	else 
   	{
    	RS = 0;   //command
    	RW = 0;   //write
   	}
    E=0;
   _nop_();  _nop_();
   LcdData=content;
   E=1;
   _nop_(); _nop_();
   E=0;
}
//初始化LCD
void Lcd_Reset()
{  
	rst=1;
	PSB=1;
   wr_lcd(comm,0x30);       //选择基本指令集
   delay(5);
   wr_lcd(comm,0x0c);       //开显示(无游标、不反白)
   delay(5);
   wr_lcd(comm,0x01);       //清除显示，并且设定地址指针为00H
   delay(5);
   wr_lcd(comm,0x06);       //指定在资料的读取及写入时，设定游标的移动方向及指定显示的移位
}

void WriteStr(unsigned char code *s)
{ 
    while(*s>0)
   {  wr_lcd(dat,*s);
      s++;     
   }
}

void hzDisp()
{ 
   wr_lcd(comm,0x80);
   WriteStr("黄河远上白云间，");
   wr_lcd(comm,0x90);
   WriteStr("一片孤城万仞山。");
   wr_lcd(comm,0x88);
   WriteStr("羌笛何须怨杨柳？");
   wr_lcd(comm,0x98);
   WriteStr("春风不度玉门关。");
}
void img_disp(uchar code *img)
{
  	uchar i,j;
  	for(j=0;j<32;j++)
  	{
    	for(i=0;i<8;i++)
    	{
      	wr_lcd(comm,0x34);
		 delay(5);
      	wr_lcd(comm,y+j);
		 delay(5);
      	wr_lcd(comm,x1+i);
		 delay(5);
      	wr_lcd(comm,0x30);
		 delay(5);
      	wr_lcd(dat,img[j*16+i*2]);
		 delay(5);
      	wr_lcd(dat,img[j*16+i*2+1]);
		 delay(5);
    	}
  	}
  	for(j=32;j<64;j++)
  	{
    	for(i=0;i<8;i++)
    	{
      	wr_lcd(comm,0x34);
		 delay(5);
      	wr_lcd(comm,y+j-32);
		 delay(5);
      	wr_lcd(comm,x2+i);
		 delay(5);
      	wr_lcd(comm,0x30);
		 delay(5);
      	wr_lcd(dat,img[j*16+i*2]);
		 delay(5);
      	wr_lcd(dat,img[j*16+i*2+1]);
		 delay(5);
    	}
  	}
  	wr_lcd (comm,0x36);
}


void Main()
{  
	uchar i	  ;
	uchar code tab[]={
	0xA3,0xB0,0xA3,0xB1,0xA3,0xB2,0xA3,0xB3,0xA3,0xB4,0xA3,0xB5,0xA3,0xB6,0xA3,0xB7,
	0xA3,0xB8,0xA3,0xB9};
   Lcd_Reset(); //初始化LCD屏
   hzDisp(); //显示汉字
   delay(60000); delay(40000);delay(40000);
   for(i=0;i<10;i++){
   wr_lcd(comm,0x82);
   wr_lcd(dat,tab[i*2]);
   delay(5);
   wr_lcd(dat,tab[i*2+1]);
   delay(60000); delay(40000);delay(40000);
   }
    Lcd_Reset();
	img_disp(tab5)	;
	while(1);
  
}