lcdinit.c

Samsung S3C2440 bootloader。串口输出

#include "def.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h"

#define	COLOR_RED_TFT16		0xf800
#define	COLOR_GREEN_TFT16	0x07e0
#define	COLOR_BLUE_TFT16	0x001f

#define LCDFRAMEBUFFER 0x33800000

#define LCD_XSIZE_TFT 	(240)	
#define LCD_YSIZE_TFT 	(320)
#define SCR_XSIZE_TFT 	(LCD_XSIZE_TFT*2)
#define SCR_YSIZE_TFT 	(LCD_YSIZE_TFT*2)

#define CLKVAL_TFT	(10)
#define MVAL		(13)
#define MVAL_USED 	(0)

#define HOZVAL_TFT	(LCD_XSIZE_TFT-1)
#define LINEVAL_TFT	(LCD_YSIZE_TFT-1)

#define VBPD		(2)		//垂直同步信号的后肩
#define VFPD		(2)		//垂直同步信号的前肩
#define VSPW		(4)		//垂直同步信号的脉宽

#define HBPD		(8)		//水平同步信号的后肩
#define HFPD		(8)		//水平同步信号的前肩
#define HSPW		(6)		//水平同步信号的脉宽

#define M5D(n) ((n) & 0x1fffff)	// To get lower 21bits

U16 (*frameBuffer16BitTft)[SCR_XSIZE_TFT];

//优龙LCD驱动夏普DH01液晶屏
void LcdDisplay(void)
{
	int x, y;
	//PWM, GPB1
	rGPBUP  &= 0xfffd;
	rGPBCON &= 0xfffffff3;	
	rGPBCON |= 0x00000004;
	rGPBDAT |= 0x0002;
	
	frameBuffer16BitTft=(U16 (*)[SCR_XSIZE_TFT])LCDFRAMEBUFFER;
	rLCDCON1=(CLKVAL_TFT<<8)|(MVAL_USED<<7)|(3<<5)|(12<<1)|0;
    	// TFT LCD panel,12bpp TFT,ENVID=off
	rLCDCON2=(VBPD<<24)|(LINEVAL_TFT<<14)|(VFPD<<6)|(VSPW);
	rLCDCON3=(HBPD<<19)|(HOZVAL_TFT<<8)|(HFPD);
	rLCDCON4=(MVAL<<8)|(HSPW);
	rLCDCON5=(1<<11)|(0<<9)|(0<<8)|(1<<0);	//FRM5:6:5,HSYNC and VSYNC are inverted
	rLCDSADDR1=(((U32)frameBuffer16BitTft>>22)<<21)|M5D((U32)frameBuffer16BitTft>>1);
	rLCDSADDR2=M5D( ((U32)frameBuffer16BitTft+(SCR_XSIZE_TFT*LCD_YSIZE_TFT*2))>>1 );
	rLCDSADDR3=(((SCR_XSIZE_TFT-LCD_XSIZE_TFT)/1)<<11)|(LCD_XSIZE_TFT/1);
	rLCDINTMSK|=(3); // MASK LCD Sub Interrupt
	rTCONSEL&=~((1<<4)|1);	// Disable LCC3600, LPC3600
	rTPAL=0; // Disable Temp Palette
	
	rLCDCON1|=1; // ENVID=ON
	
	for(y=0; y<LCD_YSIZE_TFT; y++)
		for(x=0; x<LCD_XSIZE_TFT; x++)
			frameBuffer16BitTft[y][x] = COLOR_RED_TFT16;
	for(y=10; y<LCD_YSIZE_TFT-10; y++)
		for(x=10; x<LCD_XSIZE_TFT-10; x++)
			frameBuffer16BitTft[y][x] = COLOR_GREEN_TFT16;
	for(y=20; y<LCD_YSIZE_TFT-20; y++)
		for(x=20; x<LCD_XSIZE_TFT-20; x++)
			frameBuffer16BitTft[y][x] = COLOR_BLUE_TFT16;
}