// To Drive The LCD 




#define LCD_G
#include "sysincludes.h"



unsigned save_rGPCUP,save_rGPCDAT,save_rGPCCON;
unsigned save_rGPDUP,save_rGPDDAT,save_rGPDCON; 
unsigned lcd_count;

void Lcd_Port_Init(void)
{
    save_rGPCCON=rGPCCON;
    save_rGPCDAT=rGPCDAT;
    save_rGPCUP=rGPCUP;
    save_rGPDCON=rGPDCON;
    save_rGPDDAT=rGPDDAT;
    save_rGPDUP=rGPDUP;
    rGPCUP=0xffffffff; // Disable Pull-up register
    rGPCCON=0xaaaaaaaa; //Initialize VD[7:0],LCDVF[2:0],VM,VFRAME,VLINE,VCLK,LEND 
    rGPDUP=0xffffffff; // Disable Pull-up register
    rGPDCON=0xaaaaaaaa; //Initialize VD[23:8]
    
    printf(" Initalize the LCD Port ");
}


void LcdInit( void ) 
{
    frameBuffer16BitTft240320=(ushort * )LCDFRAMEBUFFER;
	rLCDCON1=(CLKVAL_TFT_240320<<8)|(MVAL_USED<<7)|(3<<5)|(12<<1)|0;
	
    	// TFT LCD panel,12bpp TFT,ENVID=off
	rLCDCON2=(VBPD_240320<<24)|(LINEVAL_TFT_240320<<14)|(VFPD_240320<<6)|(VSPW_240320);
	
	rLCDCON3=(HBPD_240320<<19)|(HOZVAL_TFT_240320<<8)|(HFPD_240320);
	
	rLCDCON4=(MVAL<<8)|(HSPW_240320);
	
	rLCDCON5=(1<<11)|(1<<9)|(1<<8);	//FRM5:6:5,HSYNC and VSYNC are inverted
	
	rLCDSADDR1=(((U32)frameBuffer16BitTft240320>>22)<<21)|M5D((U32)frameBuffer16BitTft240320>>1);
	
	rLCDSADDR2=M5D( ((U32)frameBuffer16BitTft240320+(SCR_XSIZE_TFT_240320*LCD_YSIZE_TFT_240320*2))>>1 );
	
	rLCDSADDR3=(((SCR_XSIZE_TFT_240320-LCD_XSIZE_TFT_240320)/1)<<11)|(LCD_XSIZE_TFT_240320/1);
	
	rLCDINTMSK|=(3); // MASK LCD Sub Interrupt
	
	rLPCSEL&=(~7); // Disable LPC3600
	
	rTPAL=0; // Disable Temp Palette


}


void Lcd_Lpc3600Enable(void)
{
    rLPCSEL&=~(7);
    rLPCSEL|=(7); // 240320,Enable LPC3600
}    



void Lcd_EnvidOnOff(int onoff)
{
    if(onoff==1)
	rLCDCON1|=1; // ENVID=ON
    else
	rLCDCON1 =rLCDCON1 & 0x3fffe; // ENVID Off
}    





/// Lcd Opetion Function 

void PutPixel(U32 x,U32 y,U32 c)
{
   uint temp ; 
   
   temp = 480*y + x ; 
   
   if(x<SCR_XSIZE_TFT_240320 && y<SCR_YSIZE_TFT_240320)
        frameBuffer16BitTft240320[temp] = (ushort)c ; 
}

void Glib_ClearScr(U32 c, int type)
{	
    uint i, j ;
    
    type = type ; 
   
    for(j=0;j<SCR_YSIZE_TFT_240320;j++)
       for(i=0;i<SCR_XSIZE_TFT_240320;i++)
	 PutPixel(i,j,c);
   
}

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 LcdTest( void )
{
    
    Lcd_Port_Init() ; 
    LcdInit() ;
    Lcd_Lpc3600Enable() ; 
    Lcd_EnvidOnOff(1) ;  
      
    Glib_ClearScr( 0, 0 ) ; 
    
    Glib_Line(0,0,239,319,0x1f);        
    Glib_Line(239,0,0,319,0x1f);




}