st7920并行方式.c

ST7920芯片的并行接口显示程序.下载进51就可以测试12864

#include <reg52.h>

#define uint  unsigned int
#define uchar unsigned char
#define x1    0x80
#define x2    0x88
#define y     0x80
#define comm  0
#define dat   1

sbit RS = P0^0;   //H=data; L=command;
sbit RW = P0^1;   //H=read; L=write;
sbit  E = P0^2;   //input enable;
sbit PSB= P0^3;   //H=并口; L=串口;
sbit RST= P0^4;   //Reset Signal 低电平有效

sbit busy=P1^7;   //lcd busy bit

void wr_lcd (uchar dat_comm,uchar content);
void chk_busy (void);
void delay (uint us);
uchar code logo[]={"****************"
                   "      V1.0      "
				   "炮兵自动报靶系统"
				   "****************"};
uchar code menu[]={"请选择雷达型号："
                   " 3.LLP92 4.LLP33"
                   ">1.LLP32 2.LLP62"
				   " 5. 激光测距机  "};
uchar code link[]={"雷达型号：      "
                   "正在建立        "
                   "数据连接        "
				   " 5. 激光测距机  "};
uchar code linkok[]={"雷达型号:LLP33  "
				     "接收  ON        "
					 "链路连接成功    "
				     "发送  ON        "
				   };

void init_lcd (void)
{
  	RST = 1;
  	PSB = 1;
  	wr_lcd(comm,0x30);  /*30---基本指令动作*/   
  	wr_lcd(comm,0x01);  /*清屏，地址指针指向00H*/
  	wr_lcd(comm,0x06);  /*光标的移动方向*/
  	wr_lcd(comm,0x0c);  /*开显示，关游标*/
}

/******************************************************************************************
* 函数名称    ：chn_disp
* 功能描述    ： 显示汉字或字符
**********************************************/

void chn_disp(uchar code *chn)
{
  	uchar i,j;
  	wr_lcd(comm,0x30);
  	wr_lcd(comm,0x80);
  	for(j=0;j<4;j++)
  	{
    	for(i=0;i<16;i++)
    	wr_lcd(dat,chn[j*16+i]);
  	}
}



/******************************************************************************************
* 函数名称    ：lat_disp
* 功能描述    ： 显示点阵
******************************************************************************************/
void lat_disp(uchar data1,uchar data2)
{
  	uchar i,j,k,x;
  	x=x1;
  	for(k=0;k<2;k++)
  	{
    	for(j=0;j<16;j++)
    	{
      	for(i=0;i<8;i++)
      	{
        	wr_lcd(comm,0x34);
       	 	wr_lcd(comm,y+j*2);
        	wr_lcd(comm,x+i);
        	wr_lcd(comm,0x30);
        	wr_lcd(dat,data1);
        	wr_lcd(dat,data1);
      	}
      	for(i=0;i<8;i++)
      	{
        	wr_lcd(comm,0x34);
        	wr_lcd(comm,y+j*2+1);
        	wr_lcd(comm,x+i);
        	wr_lcd(comm,0x30);
        	wr_lcd(dat,data2);
        	wr_lcd(dat,data2);
      	}
    	}
    	x=x2;
  	}
  	wr_lcd(comm,0x36);
}

/******************************************************************************************
* 函数名称    ：con_disp
* 功能描述    ： 当data1=0xff,data2=0xff时,在x0,y0处反白显示16xl*yl
******************************************************************************************/
void con_disp(uchar data1,uchar data2,uchar x0,uchar y0,uchar xl,uchar yl)
{
  	uchar i,j;
  	for(j=0;j<yl;j++)
  	{
    	for(i=0;i<xl;i++)
    	{
      	wr_lcd(comm,0x34);
      	wr_lcd(comm,y0+j);
      	wr_lcd(comm,x0+i);
      	wr_lcd(comm,0x30);
      	wr_lcd(dat,data1);
      	wr_lcd(dat,data2);
    	}
  	}
  	wr_lcd(comm,0x36);
}

/******************************************************************************************
* 函数名称    ：clrram
* 功能描述    ： 清DDRAM
******************************************************************************************/
void clrram(void)
{
  	wr_lcd(comm,0x30);
  	wr_lcd(comm,0x01);
}

void wr_lcd(uchar dat_comm,uchar content)
{
  	chk_busy ();
  	if(dat_comm)
   	{
    	RS = 1;   //data
    	RW = 0;   //write
   	}
  	else 
   	{
    	RS = 0;   //command
    	RW = 0;   //write
   	}
  	P1=content;   //output data or comm
  	E = 1;
  	;
  	E = 0;
}
void chk_busy(void)
{
  	P1 = 0xff;
  	RS = 0;
  	RW = 1;
  	E = 1;
  	while(busy==1);
  	E = 0;
}

void delay(uint us)   //delay time
{
  	while(us--);
}


void delay1(uint ms)
{
  	uint i,j;
  	for(i=0;i<ms;i++)
  	for(j=0;j<15;j++)
  	delay(1);
}

void main()
{
  	SP=0x5f;
  	init_lcd();
  	while(1)
  	{	lat_disp(0xff,0xff);
	     chn_disp(logo);
    	//con_disp(0xff,0xff,0x8c,0x80,16,64);
    	delay1(8000);
        lat_disp(0xff,0xff);
    	chn_disp(menu);
    	//con_disp(0xff,0xff,0x8c,0x80,16,64);
    	delay1(8000);
	    //lat_disp(0x00,0x00);
	init_lcd();
    	chn_disp(link);
    	//con_disp(0xff,0xff,0x8c,0x80,16,64);
    	delay1(8000);
		lat_disp(0x00,0x00);
    	chn_disp(linkok);
    	//con_disp(0xff,0xff,0x8c,0x80,16,64);
    	delay1(8000);
    	
    	
  	}
}