lcdlib.c

嵌入式触摸屏实验

#include <string.h>
#include "..\inc\44b.h"
#include "..\inc\44blib.h"
#include "..\inc\def.h"

#include "..\inc\lcdlib.h"


//SCR_XSIZE,SCR_YSIZE,LCD_XSIZE,LCD_YSIZE are defined in lcd.h

#define M5D(n) ((n) & 0x1fffff)


#define ARRAY_SIZE_G16  	(SCR_XSIZE/2*SCR_YSIZE)


#define HOZVAL			(LCD_XSIZE/4-1)
#define HOZVAL_COLOR		(LCD_XSIZE*3/8-1)
#define LINEVAL			(LCD_YSIZE-1)
#define MVAL			(13)


#define CLKVAL_G16 		(10)   //40Mhz, CLKVAL=10 ->101Hz
				      //              9  ->112Hz	

#define CLKVAL_COLOR 		(10) //60Mhz 


void Lcd_Init();


unsigned int (*frameBuffer16)[SCR_XSIZE/8];

#define MVAL_USED 0

void Lcd_Init(void)
{
    //320x240 1bit/1pixel LCD
    
   
	if((U32)frameBuffer16==0)
	{
	    //The total frame memory should be inside 4MB.
	    //For example, if total memory is 8MB, the frame memory 
	    //should be in 0xc000000~0xc3fffff or c400000~c7fffff.
	    //But, the following code doesn't meet this condition(4MB) 
	    //if the code size & location is changed..
	    frameBuffer16=(unsigned int (*)[SCR_XSIZE/8])malloc(ARRAY_SIZE_G16); 
	}

	//The following value has to be changed for better display.
/*	rDITHMODE=0x1223a; //philips
	rDP1_2 =0x5a5a;      
	rDP4_7 =0x366cd9b;
	rDP3_5 =0xda5a7;
	rDP2_3 =0xad7;
	rDP5_7 =0xfeda5b7;
	rDP3_4 =0xebd7;
	rDP4_5 =0xebfd7;
	rDP6_7 =0x7efdfbf;*/

        //rDITHMODE=0x12210; 
/*        rDITHMODE=0x0; 	
        rDP1_2 =0xa5a5;      
	rDP4_7 =0xba5da65;
	rDP3_5 =0xa5a5f;
	rDP2_3 =0xd6b;
	rDP5_7 =0xeb7b5ed;
	rDP3_4 =0x7dbe;
	rDP4_5 =0x7ebdf;
	rDP6_7 =0x7fdfbfe;*/


        rDITHMODE=0x12210; 	
        //rDITHMODE=0x0;
        rDP1_2 =0xa5a5;      
	rDP4_7 =0xba5da65;
	rDP3_5 =0xa5a5f;
	rDP2_3 =0xd6b;
	rDP5_7 =0xeb7b5ed;
	rDP3_4 =0x7dbe;
	rDP4_5 =0x7ebdf;
	rDP6_7 =0x7fdfbfe;



	rLCDCON1=(0)|(1<<5)|(MVAL_USED<<7)|(0x3<<8)|(0x3<<10)|(CLKVAL_G16<<12);
	    // disable,4B_SNGL_SCAN,WDLY=8clk,WLH=8clk,
	rLCDCON2=(LINEVAL)|(HOZVAL<<10)|(10<<21);  
	    //LINEBLANK=10 (without any calculation) 
	rLCDSADDR1= (0x2<<27) | ( ((U32)frameBuffer16>>22)<<21 ) | M5D((U32)frameBuffer16>>1);
	    // 16-gray, LCDBANK, LCDBASEU
	rLCDSADDR2= M5D((((U32)frameBuffer16+(SCR_XSIZE*LCD_YSIZE/2))>>1)) | (MVAL<<21);
	rLCDSADDR3= (LCD_XSIZE/4) | ( ((SCR_XSIZE-LCD_XSIZE)/4)<<9 );
	rLCDCON1=(1)|(1<<5)|(MVAL_USED<<7)|(0x3<<8)|(0x3<<10)|(CLKVAL_G16<<12);

	    // enable,4B_SNGL_SCAN,WDLY=8clk,WLH=8clk,
	
}



void Lcd_MoveViewPort(int vx,int vy)
{
    U32 addr;
   
	//The processor mode should be superviser mode.  
    	DisableInterrupt(); 

    #if (LCD_XSIZE<128)
    	while((rLCDCON1>>22)<=1); // if x<128
    #else	
    	while((rLCDCON1>>22)==0); // if x>128
    #endif
        addr=(U32)frameBuffer16+(vx/2)+vy*(SCR_XSIZE/2);
	rLCDSADDR1= (0x2<<27) | ( (addr>>22)<<21 ) | M5D(addr>>1);
	    // 16-gray, LCDBANK, LCDBASEU
	rLCDSADDR2= M5D(((addr+(SCR_XSIZE*LCD_YSIZE/2))>>1)) | (MVAL<<21);

	EnableInterrupt();
 
}    



void (*PutPixel)(U32,U32,U8);

void Glib_Init(int depth)
{    
        PutPixel=_PutPixelG16;
     
}



void _PutPixelG16(U32 x,U32 y,U8 c)
{
    if(x<SCR_XSIZE && y<SCR_YSIZE)
        frameBuffer16[(y)][(x)/8]=( frameBuffer16[(y)][x/8] & ~(0xf0000000>>((x)%8)*4) )
            | ( (c)<<((8-1-((x)%8))*4) );
}



void Glib_ClearScr(U8 c)
{	
    //Very inefficient function.
    
    int i,j;
	
    for(j=0;j<SCR_YSIZE;j++)
    	for(i=0;i<SCR_XSIZE;i++)
	    PutPixel(i,j,c);
}