0、全局變量的定義：

#define DMA_BUFFER_BASE            0xAC000000
#define DMA_PHYSICAL_BASE        0x35000000  // S3C2410X01 0x30000000

#define FRAMEBUF_BASE                (DMA_BUFFER_BASE + 0x00100000)
#define FRAMEBUF_DMA_BASE            (DMA_PHYSICAL_BASE + 0x00000000)//0x00100000

#define IOP_BASE      0x56000000 // 0x56000000

typedef struct  {
    unsigned int  GPACON;        // 00
    unsigned int  GPADAT;
    unsigned int  PAD1[2];
    ...................
    }IOPreg;  
 
// Define LCD type of S3C2400X01
#define TFT24BPP    3
#define LCDTYPE     TFT24BPP   // define LCD type as upper definition.
//
// Registers : LCD Controller
//

#define LCD_BASE      0x4D000000 // 0x4D000000
typedef struct  {
    unsigned int  LCDCON1;        // 00
    unsigned int  LCDCON2;        // 04
    unsigned int  LCDCON3;        // 08
    .....................
}LCDreg ;    

// LCD register value    

#define MODE_TFT_24BIT            (224)
#define LCD_XSIZE_TFT       (800)    
#define LCD_YSIZE_TFT       (480)
#define ARRAY_SIZE_TFT_24BIT    (SCR_XSIZE*4*SCR_YSIZE)
#define HOZVAL_TFT          (LCD_XSIZE_TFT-1)
#define LINEVAL_TFT         (LCD_YSIZE_TFT-1)
#define MVAL                (13)
#define MVAL_USED           (0)
#define VBPD                ((32-1)&0xff)
#define VFPD                ((11-1)&0xff)
#define VSPW                ((2-1) &0x3f)
#define HBPD                ((88-1)&0x7f)
#define HFPD                ((40-1)&0xff)
#define HSPW                ((128-1)&0xff)
#define CLKVAL_TFT          (1)
#define M5D(n)              ((n) & 0x1fffff)

U32* pLCDBuffer24=(U32*)FRAMEBUF_DMA_BASE;
U32* picData;

volatile LCDreg *s2410LCD = (LCDreg *)LCD_BASE;  

volatile IOPreg *s2410IOP= (IOPreg *)IOP_BASE;

int nCol = 800;//象素列數
int nRow = 480;//象素行數
U32* picDataT=NULL;

1、入口函數，其中包括了相應端口、寄存器初始化的入口，aa,bb,cc,dd,ee是可選擇的5幅預定義圖片的GRB碼數組，具體代碼如下

void lcd_Main(void)
{
    char sel;
    Uart_Printf("Lcd_Driver ");
    
    lcd_port_init();
    lcd_regs_init();
    
    Uart_Printf("select one Picture to show(1 2 3 4 5 0) ");
    
      while((sel = Uart_Getch()) != 'e')
      {
          Uart_Printf("%c ",sel);
          switch(sel)
          {
          case '1':
             picData = (U32*)aa;break;
        case '2':
             picData =(U32*)bb;break;
        case '3':
             picData = (U32*)cc;break;
        case '4':
             picData = (U32*)dd; break;
        case '5':
             picData = (U32*)ee;break;
        default:
             Uart_Printf("Input 1 2 3 4 5 0 ");
         }
         
         lcd_display();
         
         Uart_Printf("select one Picture to show(1 2 3 4 5 0) ");
     }
    Uart_Printf("Exit");
    //lcd_close();
}

2、相應端口設置，包括GPC，GPD，GPG的相應位的設置：

 
void lcd_port_init(void)
{

    // LCD port initialize.
    s2410IOP->GPCUP  = 0xFFFFFFFF;
    s2410IOP->GPCCON = 0xAAAAAAAA;

    s2410IOP->GPDUP  = 0xFFFFFFFF;
    s2410IOP->GPDCON = 0xAAAAAAAA;

    s2410IOP->GPGCON &= ~(3 << 8);                 /**//* Set LCD_PWREN as output                          */
    s2410IOP->GPGCON |=  (1 << 8);

    s2410IOP->GPGDAT |=  (1 << 4);                 //* Backlight ON，關鍵，不然lcd不亮    
}

3、控制寄存器設置：

void lcd_regs_init(void)
{
    
    #ifdef MODE_TFT_24BIT

    s2410LCD->LCDCON1   =   (1           <<  8) |   //* VCLK = HCLK / ((CLKVAL + 1) * 2) -> About 7 Mhz  
                            (MVAL_USED   <<  7) |   //* 0 : Each Frame                                   
                            (3           <<  5) |   // TFT LCD Pannel                                   
                            (13          <<  1) |   //Y: // 24bpp Mode                                      
                            (0           <<  0) ;   // Disable LCD Output                               

    s2410LCD->LCDCON2   =   (VBPD        << 24) |   //* VBPD          :  ((32-1)&0xff)                              
                            (LINEVAL_TFT << 14) |   //* LINEVAL_TFT : 480 - 1                          
                            (VFPD        <<  6) |   //* VFPD          : ((11-1)&0xff)                              
                            (VSPW        <<  0) ;   //* VSPW          : ((2-1) &0x3f)                              

    s2410LCD->LCDCON3   =   (HBPD        << 19) |   //* HBPD          :  ((88-1)&0x7f)                              
                            (HOZVAL_TFT  <<  8) |   //* HOZVAL_TFT    : 800 - 1                          
                            (HFPD        <<  0) ;   //* HFPD          : ((40-1)&0xff)                              


    s2410LCD->LCDCON4   =   (MVAL        <<  8) |   //* MVAL          :  13                              
                            (HSPW        <<  0) ;   //* HSPW          : ((128-1)&0xff)                              
    
    s2410LCD->LCDCON5   = 0x00000000;
/**//*
    s2410LCD->LCDCON5   =   (0           << 12) |   // BPP24BL       : LSB valid                        
                            (0           << 11) |   // FRM565 MODE   : 5:5:5:1 Format                     
                            (0           << 10) |   // INVVCLK       : VCLK Falling Edge                
                            (0           <<  9) |   // INVVLINE      : Inverted Polarity                
                            (0           <<  8) |   // INVVFRAME     : Inverted Polarity                
                            (0           <<  7) |   // INVVD         : Normal                           
                            (0           <<  6) |   // INVVDEN       : Normal                           
                            (0           <<  5) |   // INVPWREN      : Normal                          
                            (0           <<  4) |   // INVENDLINE    : Normal                           
                            (0           <<  3) |   // PWREN         : Disable PWREN                    
                            (0           <<  2) |   // ENLEND        : Disable LEND signal              
                            (0           <<  1) |   // BSWP          : Swap Disable                     
                            (0           <<  0) ;   // HWSWP         : Swap Enable                      
*/
    s2410LCD->LCDSADDR1 = ((FRAMEBUF_DMA_BASE >> 22)     << 21) |
                           ((M5D(FRAMEBUF_DMA_BASE >> 1)) <<  0);
    //LCDBANK = ((FRAMEBUF_DMA_BASE >> 22)     << 21)
    //LCDBASEU = ((M5D(FRAMEBUF_DMA_BASE) >> 1) <<  0)
    
    s2410LCD->LCDSADDR2 = (M5D(FRAMEBUF_DMA_BASE) >> 1) + ( (LCD_XSIZE_TFT*2) + 0 )*(LINEVAL_TFT+1);
    //LCDBASEL = s2410LCD->LCDSADDR2
    
    s2410LCD->LCDSADDR3 = (((LCD_XSIZE_TFT - LCD_XSIZE_TFT) / 1) << 11) | (LCD_XSIZE_TFT);
    //OFFSIZE = (((LCD_XSIZE_TFT - LCD_XSIZE_TFT) / 1) << 11) == 0
    //PAGEWIDTH = (LCD_XSIZE_TFT)
    
    s2410LCD->TPAL     = 0x0;
    s2410LCD->LCDCON1 |= 1;
    
    #endif
}

4、居中顯示圖片：

void lcd_display(void)
{
    int y;
    int pw, ph;
    int sw=800, sh=480;
    U32* pdata;
    U32* pBt=NULL;
    
    lcd_clear();
    
    get_XY();//獲得圖片的寬與高，以保存在RGB數組的頭兩個字節。
    pw = nCol, ph = nRow;
    
    pBt = pLCDBuffer24 + sw*(sh/2-ph/2) + (sw/2-pw/2);//定位圖片顯示的起始位置
    
    pdata = (U32*)picDataT;
    for(y=0; y<nRow; ++y)
    ...{    
        memcpy((pBt+800*y),(char*)pdata,nCol*4);//一行一行顯示
        pdata = (U32*)(pdata+nCol);
    }         
    
    s2410LCD->LCDCON1 |= 0;
    
}

5、每次顯示都要獲得圖片的寬度和高度，并且清除前面的屏幕，所謂清屏就是顯示背景圖片（藍色）：

void lcd_clear()
{
    int y=0;
    U32* pdata = (U32*)(bgData+2);
    for(y=0; y<480; ++y)
    {    
        memcpy((pLCDBuffer24+800*y),(char*)pdata,800*4);
        pdata = (U32*)(pdata+800);
    }
}

void get_XY(void)
{
    nCol = picData[0];
    nRow = picData[1];
    
    picDataT =(U32*) (picData + 2);
}