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问 S3C44B0X,G35LCD(320*240,彩色）
（一）先看程序是这样的如下：
/*文件：OPTION.H*/
#define MCLK 60000000

/*文件：LCDLIB.H */
#define MODE_COLOR         (256)
#define HOZVAL_COLOR (LCD_SIZE*3/8-1)
#define SCR_XSIZE     (640)  
#define SCR_YSIZE     (480)

#define LCD_XSIZE     (320)
#define LCD_YSIZE     (240)
#define ARRAY_SIZE_COLOR   (SCR_XSIZE/1*SCR_YSIZE)
#define MVAL        (13)
#define CLKVAL_COLOR       (10)
#define MVAL_USED          0
extern unsigned int (*frameBuffer256)[SCR_XSIZE/4];
……
void Lcd_Init(int depth);
void Lcd_DispON(void);
void Lcd_DispOFF(void);
void Lcd_Display(void);
……

/*文件：44BLIB.C ***
*函数：Port_Init()**/
void Port_Init()
{
  ……
    //PORT C GROUP
    //BUSWIDTH=16
    //PORT C GROUP
    //rPCONC[31:0]
    //|GPC15|.............................................GPC5GPC4...............|    GPC0
    //|BIT31|....................................................................|    BIT0
    //|nCTS0|nRTS0|RXD1|TXD1|nCTS1|nRTS1|nEL|nDISP|VD4|VD6|   |   |LED2|LED1|LED0|D12SUSPD
    //|   00|   00|  11|  11|   00|   00| 01|   01| 11| 11| 01| 01|  01|  01|  01|      01
    //rPUPC[15:0]
    //|    0|    0|   1|   1|    0|    0|  0|    0|  1|  1|  0|  0|   0|   0|   0|       0
    rPDATC=0xffff;    //All I/O Is High
    rPCONC=0x0f05f555;    
    rPUPC=0x30c0;    //PULL UP RESISTOR should be enabled to I/O


    //PORT D GROUP
    //rPCOND
    //| BIT15|.........................|BIT0
    //|VFRAME|VM|VLINE|VCLK|VD3|VD2|VD1|VD0
    //|    10|10|   10|     10| 10| 10| 10| 10  
    rPDATD=0xff;
        
    rPCOND=0xaaaa;    
    rPUPD=0xff;

  ……
}

/* 文件：LCDLIB.C */
……
#include "..\inc\lcdlib.h"
……
unsigned int (*frameBuffer256)[SCR_XSIZE/4];
void Lcd_Init(int depth)
{
    switch(depth)
    {
    case 1:    
          ……
        break;

    case 4:
           ……
        break;

    /* 256 MODE_COLOR */
    case 256:
     if((U32)frameBuffer256==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..
        frameBuffer256=(unsigned int (*)[SCR_XSIZE/4])malloc(ARRAY_SIZE_COLOR);
    }

    rLCDCON1=(0)|(2<<5)|(MVAL_USED<<7)|(0x1<<8)|(0x1<<10)|(CLKVAL_COLOR<<12);
        // disable,8B_SNGL_SCAN,WDLY=8clk,WLH=8clk,
    rLCDCON2=(LINEVAL)|(HOZVAL<<10)|(10<<21);  
        //LINEBLANK=10 (without any calculation)
//    rLCDSADDR1= (0x3<<27) | ( ((U32)frameBuffer256>>22)<<21 ) | M5D((U32)frameBuffer256>>1);
    rLCDSADDR1= (0x3<<27) | ( ((U32)frameBuffer256>>22)<<21 ) | 0x0;

        // 256-color, LCDBANK, LCDBASEU
//    rLCDSADDR2= M5D((((U32)frameBuffer256+(SCR_XSIZE*LCD_YSIZE))>>1)) | (MVAL<<21);
    rLCDSADDR2= (0)<<29|(0)<<21|((320/16+(640-320)/16)*240);

    rLCDSADDR3= (LCD_XSIZE/2) | ( ((SCR_XSIZE-LCD_XSIZE)/2)<<9 );

    //The following value has to be changed for better display.

    rREDLUT  =0xfdb96420;
    rGREENLUT=0xfdb96420;
    rBLUELUT =0xfb40;

    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=(1)|(2<<5)|(MVAL_USED<<7)|(0x1<<8)|(0x1<<10)|(CLKVAL_COLOR<<12);
          break;
    default:
    break;
    }    
}

void Lcd_Display(void)
{
    int i,j;

    for(j=0;j<240;j++)
        for(i=0;i<20;i++)
        {
            //frameBuffer4[j][i]=(girl[i*4+0])<<24
            //                  +(girl[i*4+1])<<16
            //                  +(girl[i*4+2])<<8
            //                  +(girl[i*4+3]);

            frameBuffer256[j][i]=0xffff0000;

        }

}

void Lcd_DispON(void)
{
    Delay(5000);
    rPDATC = ( rPDATC & (~(1<<8)) );
    Delay(5000);
}
void Lcd_DispOFF(void)
{
    Delay(5000);
    rPDATC = ( rPDATC | (1<<8) );
    Delay(5000);
}

/* 文件：Main.c */
void Main(void)
{
    int i;
    char aa;
    
    rSYSCFG=CACHECFG;   // Using 8KB Cache//
    
    pISR_SWI=(_ISR_STARTADDRESS+0xf0);      //for pSOS

    Port_Init();
    
    Isr_Init();
    
    Uart_Init(0,57600);
    Uart_Select(0); //Select UART0

    
    Uart_Printf("\n*********** start to test lcd *************\n");
    Uart_Printf("\n*********** press any to start Lcd_Init()************\n");
    Uart_Getch();
    Lcd_Init(MODE_COLOR);     //Init Lcd
    Uart_Printf("\n******* Lcd_Init() success,press any key********\n");
    Uart_Getch();

    Uart_Printf("\n******* press any key to test Lcd_DispON() ********\n");
    Uart_Getch();
    Lcd_DispON();
    Uart_Printf("\n******* Lcd_DispON() sucess,press any key ********\n");
    Uart_Getch();

    Uart_Printf("\n******* press any key to test Display() ********\n");
    Uart_Getch();
    Lcd_Display();
    Uart_Printf("\n******* Display() success,press any key********\n");
    Uart_Getch();

    Uart_Printf("\n******* press any key to test Lcd_DispOFF() ********\n");
    Uart_Getch();
    Lcd_DispOFF();
    Uart_Printf("\n******* Lcd_DispOFF() success,press any key********\n");
    Uart_Getch();


    return;


（二）问题
     大家先看看上面程序有没有问题。
     问题：在Main()里，如果屏蔽Lcd_Display()即：
     //Lcd_Display()
     则正常运行
     如果不屏蔽Lcd_Display()则当运行该函数时，板子就被复位了。
    
     不知道是不是frameBuffer256的问题？我是初学者弄了半天，不明白，帮帮忙。
答 1: 原文件如下上面是被改动的，原文件如下（即被改过的地方）：
/* 文件：lcdlib.c */
rLCDCON1=(0)|(2<<5)|(MVAL_USED<<7)|(0x3<<8)|(0x3<<10)|(CLKVAL_COLOR<<12);
        // disable,8B_SNGL_SCAN,WDLY=8clk,WLH=8clk,
//被改为：rLCDCON1=(0)|(2<<5)|(MVAL_USED<<7)|(0x3<<8)|(0x3<<10)|(CLKVAL_COLOR<<12);

    rLCDSADDR1= (0x3<<27) | ( ((U32)frameBuffer256>>22)<<21 ) | M5D((U32)frameBuffer256>>1);
        // 256-color, LCDBANK, LCDBASEU
//被改为：rLCDSADDR1= (0x3<<27) | ( ((U32)frameBuffer256>>22)<<21 ) | 0x0;

    rLCDSADDR2= M5D((((U32)frameBuffer256+(SCR_XSIZE*LCD_YSIZE))>>1)) | (MVAL<<21);
//被改为：rLCDSADDR2= (0)<<29|(0)<<21|((320/16+(640-320)/16)*240);

    rLCDCON1=(1)|(2<<5)|(MVAL_USED<<7)|(0x3<<8)|(0x3<<10)|(CLKVAL_COLOR<<12);
        // enable,8B_SNGL_SCAN,WDLY=8clk,WLH=8clk,
//被改为：rLCDCON1=(1)|(2<<5)|(MVAL_USED<<7)|(0x1<<8)|(0x1<<10)|(CLKVAL_COLOR<<12);

/* 文件:44BLIB.C *
* 函数：Port_Init() */
void Port_Init()
{
……
    rPCONC=0x0ffffff;
//被改为：rPCONC=0x0f05f555;

    rPUPC=0x3000;    //PULL UP RESISTOR should be enabled to I/O
//被改为rPUPC=0x30c0;

    rPCOND= 0x8aaa;
//被改为：rPCOND=0xaaaa;    

    rPUPD = 0xbf;
//被改为：rPUPD=0xff;

……
}