lcd_ctrl.c

单片机控制lcd屏幕的程序

#include <at89x52.h>
#include <absacc.h>
#include <intrins.h>
#include <math.h> 
#include "lcd_ctrl.h"
#include "mcu_main.h"
//xdata unsigned char WCMD _at_ (CMDADDR);//
//xdata unsigned char WDAT _at_ (DATADDR);

xdata unsigned char Op_Port0 _at_ (LcdPort0);//
xdata unsigned char Op_Port1 _at_ (LcdPort1);//
xdata unsigned char Op_Port2 _at_ (LcdPort2);//
xdata unsigned char Op_Port3 _at_ (LcdPort3);//

//////////////////////////////////////////////////////////////////////////
void SetParameter(unsigned char CtrReg)
{ 
  unsigned char ch;
  Op_Port1 =CtrReg | 0x44;
  _nop_();
  ch=Op_Port1;
}

///////////////////////////////////////////////////////
//画点的函数----坐标和颜色
//Row参数是行(0--234)，x参数是列(0--319,479)
void DrawDot(unsigned int X_coor,unsigned int Y_coor,unsigned char color)
{
   Op_Port2 =Y_coor>>8;
   Op_Port2 =Y_coor;
   Op_Port1 =X_coor>>8;
   Op_Port1 =X_coor;
   Op_Port0 =color;
}

/////////////////////////////////////////////////////////////////////////
////////////////////////clear LCD ///////////////////////////////////////
////////////////////////dual scan////////////////////////////////////////

void ClearLcd(unsigned char color)    
{
   unsigned int i;
   unsigned char j;	
   IE   &= 0x67;  //禁止中断
 //  Color_CSJ=0;
   for(j=0;j<LcdHeight;j++)
   {
       Op_Port2 = 0x00;
       Op_Port2 = j;    
       Op_Port1 =0x00;
       Op_Port1 =0x00;

     for(i=0;i<LcdWidth;i++)
     {
//       while (LCD_BUSY);	
       Op_Port0 = color;
	   _nop_();
     }
     Op_Port2 =0x01;
     Op_Port2 = j;    
     Op_Port1 =0x00;
     Op_Port1 =0x00;
     for(i=0;i<LcdWidth;i++)
     {
//       while (LCD_BUSY);	
       Op_Port0 = color;
	   _nop_();
     }
   }
//   Color_CSJ=1;
   IE   |= 0x98;  //打开中断

}

////////////////////////////////////////////////////////////////////////
/*画线。任意方向的斜线,直线数学方程　aX+bY=1　　　*/ 
//////////////////////////////////////////////////////
//画线的函数  入口参数---线的起点和终点----color
void DrawLine(unsigned int xsta,unsigned int ysta,unsigned int xend,
	      unsigned int yend, unsigned char color)      
{  
   int Xerr=0;
   int Yerr=0;
   int DeltaX;
   int DeltaY;
   int Distance;
   int IncY; 
   int IncX;
   unsigned int X;  //列号，列间距
   unsigned int Y; //两行之间的间距
   unsigned int i;   
       DeltaX=xend-xsta; /*计算坐标增量　　　*/ 
       DeltaY=yend-ysta;//行间距
       X=xsta; //把地址变化方式设为列方向增加
       Y=ysta;
   if(DeltaX > 0) //
     {   
     	IncX = 1; /*设置单步方向　　　*/ 
     }	      
   else if (DeltaX == 0)
      {
      	IncX = 0; /*垂直线　　　*/
      }
   else 
      {
      	IncX=-1;
      	DeltaX=-DeltaX;
      }
    if(DeltaY > 0)
      {
      	IncY = 1; /*设置单步方向　　　*/  
    	}  
   else if (DeltaY == 0)
      {
      	IncY = 0; /*水平线　　　*/
      }
   else 
      {
      	IncY=-1;
      	DeltaY=-DeltaY;
      }    	
    if(DeltaX > DeltaY)
      {
      	Distance = DeltaX;
      }
    else 
      {
      	Distance = DeltaY;
      }  
    for (i=0;i<Distance + 1;i++)
      {  /*画线输出　　　*/ 
        DrawDot(X,Y,color); 
        Xerr += DeltaX;
        Yerr += DeltaY;  
        if(Xerr > Distance)
          {
          	Xerr -= Distance;
          	X += IncX; //
          }
        if(Yerr > Distance)
          {
          	Yerr -= Distance;
          	Y += IncY; //
          }          
      }
}




//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
//在一个320X240的平面上画圆

void circle(int x,y,r,char color)
{
/*
float xdata  angle;
int xdata  CoodX,CoodY;
*/
float angle;
int CoodX,CoodY;
for(angle=0;angle<6.28;angle+=0.01)
{
  //drawPixel(x+r*cos(angle),y+r*sin(angle));
  
  CoodY=y+r*cos(angle);//x 是列坐标，Y是行坐标
  CoodX=x+r*sin(angle);
  DrawDot(CoodY,CoodX,color);
 // DrawInitail(CoodY,CoodX);
 // WriteData(color);
}
}
/////////////////////////////////////////////////////////////////////
//用对称的方式画圆，速度比较快
/*画圆。数学方程(X-Ox)^2+(Y-Oy)^2=Rx^2　　　　　　*/ 
void circle1(unsigned int Ox,Oy, unsigned char Rx,color)

{
	
//  unsigned  int xdata xx,rr,xt,yt,rs,row,col;
  unsigned  int xx,rr,xt,yt,rs,row,col;	

    yt=Rx;
	
    rr=Rx*Rx+1;			//补偿 1 修正方形
	
    rs=(yt+(yt>>1))>>1;		//(*0.75)分开1/8圆弧来画
	//SetReg(0x00,0x0c);
   for (xt=0;xt<=rs;xt++)
	
      {
		
	xx=xt*xt;
		
	while ((yt*yt)>(rr-xx)) yt--;
		
	row=Ox+xt;     //第一象限
			
	col=Oy-yt;

	//W_DOT(row,col);
	
	DrawDot(row,col,color);
	row=Ox-xt;		//第二象限
	
	//W_DOT(row,col);
	
	DrawDot(row,col,color);
	col=Oy+yt;		//第三象限
	
	//W_DOT(row,col);
	
	DrawDot(row,col,color);
	row=Ox+xt;		//第四象限

	//W_DOT(row,col);
	DrawDot(row,col,color);
	                
/***************45度镜象画另一半***************/
	
	row=Ox+yt;              //第一象限
	
	col=Oy-xt;

	//W_DOT(row,col);

	DrawDot(row,col,color);
	row=Ox-yt;		//第二象限
	
	//W_DOT(row,col);
	
	DrawDot(row,col,color);
	col=Oy+xt;		//第三象限

	//W_DOT(row,col);
	
	DrawDot(row,col,color);
	row=Ox+yt;		//第四象限
	
	//W_DOT(row,col);

	DrawDot(row,col,color);
     }

}




/////////////////////////////////////////////////////
/////disp_char/////////////////////////////////////
void disp_char(unsigned int Ox,Oy,unsigned char CharX,CharY, const unsigned char CharData[] ,unsigned char color)
{
unsigned char CharByte;
unsigned int Xindex,Yindex;
unsigned char i,temp_char;
 for (Yindex=0;Yindex<CharY;Yindex++)
  {
  for(Xindex=0;Xindex<CharX;Xindex++)
  {
   CharByte = CharData[Yindex*Xindex + Xindex]; //
   temp_char = 0x01;
   for(i=0;i++;i<8)
   {
    if(CharByte&temp_char) 
    DrawDot(Ox,Oy,color); 
    temp_char *=2;
    Ox++;
   }
  }
  Ox -= CharX*8; //?
  Oy++;
 }
}