lcdlib.c

在arm realview下的s3c2410开发板测试工程及代码

/*****************************************
  NAME: lcdlib.c
  DESC: lcd configuration low-level codes
  HISTORY:
  2002.03.13:draft ver 0.0
 *****************************************/
#include <string.h>
#include "2410addr.h"
#include "2410lib.h"
#include "def.h"
//#include "option.h"
//#include "24xslib.h" 
#include "lcdlib.h"


//Color STN
U32 (*frameBuffer8Bit)[SCR_XSIZE_CSTN/4];


void Lcd_Init()
{

    //case MODE_CSTN_8BIT:
	frameBuffer8Bit=(U32 (*)[SCR_XSIZE_CSTN/4])LCDFRAMEBUFFER;
	rLCDCON1=(CLKVAL_CSTN<<8)|(MVAL_USED<<7)|(2<<5)|(3<<1)|0;
    	// 8-bit single scan,8bpp CSTN,ENVID=off
	rLCDCON2=(0<<24)|(LINEVAL_CSTN<<14)|(0<<6)|(0<<0);
	rLCDCON3=(WDLY_CSTN<<19)|(HOZVAL_CSTN<<8)|(LINEBLANK_CSTN<<0);
	rLCDCON4=(MVAL<<8)|(WLH_CSTN<<0);
	rLCDCON5=0;
	//BPP24BL:x,FRM565:x,INVVCLK:x,INVVLINE:x,INVVFRAME:x,INVVD:x,
	//INVVDEN:x,INVPWREN:x,INVLEND:x,PWREN:x,ENLEND:x,BSWP:x,HWSWP:x
	rLCDSADDR1=(((U32)frameBuffer8Bit>>22)<<21 )|M5D((U32)frameBuffer8Bit>>1);
	rLCDSADDR2=M5D( ((U32)frameBuffer8Bit+(SCR_XSIZE_CSTN*LCD_YSIZE_CSTN/1))>>1 );
	//rLCDSADDR3=(((SCR_XSIZE_CSTN-LCD_XSIZE_CSTN)/2)<<11)|(LCD_XSIZE_CSTN/2);
	rLCDSADDR3=(((SCR_XSIZE_CSTN-LCD_XSIZE_CSTN)/2<<11)|(LCD_XSIZE_CSTN/2));
	rDITHMODE=0x0;
	rREDLUT  =0xfdb96420;
	rGREENLUT=0xfdb96420;
	rBLUELUT =0xfb40;

	rGPGCON =(rGPGCON | (0x3<<8));
}

//tur on or off the lcd
void Lcd_CstnOnOff(int onoff)
{
    // 1:CSTN Panel on  0:CSTN Panel off //	
    if(onoff==1)
    {
	rLCDCON1|=1; // ENVID=ON
	rLCDCON5= rLCDCON5 | (0x1<<3);
     }
    else
     {
	rLCDCON1 =rLCDCON1 & 0x3fffe; // ENVID Off
	rLCDCON5 =(rLCDCON5 & ~(0x1<<3));
      }

    
    rGPBUP=rGPBUP|(1<<5); // Pull-up disable
    rGPBDAT=rGPBDAT&(~(1<<5))|(onoff<<5); // GPB5=On or Off
    rGPBCON=rGPBCON&(~(3<<10))|(1<<10);    //GPD9=output
}    

//set the pixel
void PutPixel(U32 x,U32 y,U32 c)
{
    if(x<SCR_XSIZE_CSTN&& y<SCR_YSIZE_CSTN)
        frameBuffer8Bit[(y)][(x)/4]=( frameBuffer8Bit[(y)][x/4]
	    & ~(0xff000000>>((x)%4)*8) ) | ( (c&0x000000ff)<<((4-1-((x)%4))*8) );
}


//draw a rectgangle
void Glib_Rectangle(int x1,int y1,int x2,int y2,int color)
{
    Glib_Line(x1,y1,x2,y1,color);
    Glib_Line(x2,y1,x2,y2,color);
    Glib_Line(x1,y2,x2,y2,color);
    Glib_Line(x1,y1,x1,y2,color);
}


//fill a rectangle 
void Glib_FilledRectangle(int x1,int y1,int x2,int y2,int color)
{
    int i;

    for(i=y1;i<=y2;i++)
	Glib_Line(x1,i,x2,i,color);
}


//draw a line
// LCD display is flipped vertically
// But, think the algorithm by mathematics point.
//   3I2
//   4 I 1
//  --+--   <-8 octants  mathematical cordinate
//   5 I 8
//   6I7
void Glib_Line(int x1,int y1,int x2,int y2,int color)
{
	int dx,dy,e;
	dx=x2-x1; 
	dy=y2-y1;
    
	if(dx>=0)
	{
		if(dy >= 0) // dy>=0
		{
			if(dx>=dy) // 1/8 octant
			{
				e=dy-dx/2;
				while(x1<=x2)
				{
					PutPixel(x1,y1,color);
					if(e>0){y1+=1;e-=dx;}	
					x1+=1;
					e+=dy;
				}
			}
			else		// 2/8 octant
			{
				e=dx-dy/2;
				while(y1<=y2)
				{
					PutPixel(x1,y1,color);
					if(e>0){x1+=1;e-=dy;}	
					y1+=1;
					e+=dx;
				}
			}
		}
		else		   // dy<0
		{
			dy=-dy;   // dy=abs(dy)

			if(dx>=dy) // 8/8 octant
			{
				e=dy-dx/2;
				while(x1<=x2)
				{
					PutPixel(x1,y1,color);
					if(e>0){y1-=1;e-=dx;}	
					x1+=1;
					e+=dy;
				}
			}
			else		// 7/8 octant
			{
				e=dx-dy/2;
				while(y1>=y2)
				{
					PutPixel(x1,y1,color);
					if(e>0){x1+=1;e-=dy;}	
					y1-=1;
					e+=dx;
				}
			}
		}	
	}
	else //dx<0
	{
		dx=-dx;		//dx=abs(dx)
		if(dy >= 0) // dy>=0
		{
			if(dx>=dy) // 4/8 octant
			{
				e=dy-dx/2;
				while(x1>=x2)
				{
					PutPixel(x1,y1,color);
					if(e>0){y1+=1;e-=dx;}	
					x1-=1;
					e+=dy;
				}
			}
			else		// 3/8 octant
			{
				e=dx-dy/2;
				while(y1<=y2)
				{
					PutPixel(x1,y1,color);
					if(e>0){x1-=1;e-=dy;}	
					y1+=1;
					e+=dx;
				}
			}
		}
		else		   // dy<0
		{
			dy=-dy;   // dy=abs(dy)

			if(dx>=dy) // 5/8 octant
			{
				e=dy-dx/2;
				while(x1>=x2)
				{
					PutPixel(x1,y1,color);
					if(e>0){y1-=1;e-=dx;}	
					x1-=1;
					e+=dy;
				}
			}
			else		// 6/8 octant
			{
				e=dx-dy/2;
				while(y1>=y2)
				{
					PutPixel(x1,y1,color);
					if(e>0){x1-=1;e-=dy;}	
					y1-=1;
					e+=dx;
				}
			}
		}	
	}
}



void Glib_ClearScr(U32 c)
{	
    //Very inefficient function.
    int i,j;
    for(j=0;j<240;j++)
    {
       for(i=0;i<320;i++)
       {      
		PutPixel(i,j,c);
        }
     }
}