移植uboot1.3.1到s3c2410（7）--lcd支持

4     修改U-boot文件，添加LCD驱动

4.1        驱动lcd，并刷屏

1）修改include/configs/edukit2410.h文件

#define CONFIG_DRIVER_LCD

/*suport LCD*/

#endif     /* __CONFIG_H */

2）添加LCD驱动及初始化函数

在/board/Embest/edukit2410/目录下建立文件，命名为lcd.c,并将以下代码拷贝到该文件中。

/******************************************************************************************

* File�� lcdapp.c

* Author:       Embest 

* Desc��      LCD_Test

* History:      

*************************************************************************************/

 

/*------------------------------------------------------------------------------------------*/

/*                                                            include files                                                                     */

/*------------------------------------------------------------------------------------------*/

 

//#include "2410lib.h"

//#include "lcdlib.h"

#define UINT32T unsigned int

#define INT16T     short int

#define UINT8T  unsigned char

 

/*------------------------------------------------------------------------------------------*/

/*                                                            constant define                                                                      */

/*------------------------------------------------------------------------------------------*/

#define LCD_BUF_SIZE             (SCR_XSIZE_TFT_640480*SCR_YSIZE_TFT_640480/2)

#define LCD_ACTIVE_BUFFER    (0x33800000)

#define LCD_VIRTUAL_BUFFER  (0x33800000 + LCD_BUF_SIZE)

#define LCD_D_OFF                  rGPCDAT &= ~(1 << 4);

#define LCD_D_ON                   rGPCDAT |= (1 << 4);

#define MODE_TFT_16BIT_640480    (0x4204)

 

//Timing parameter for V16C6448AB(PRIME VIEW)

#define VBPD_640480        ((33-1)&0xff)

#define VFPD_640480        ((10-1)&0xff)

#define VSPW_640480              ((2-1) &0x3f)

#define HBPD_640480              ((48-1)&0x7f)

#define HFPD_640480        ((16-1)&0xff)

#define HSPW_640480             ((96-1)&0xff)

 

#define MVAL        (13)

#define MVAL_USED    (0)

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

 

#define CLKVAL_TFT_640480   (1)

    //53.5hz @90Mhz

    //VSYNC,HSYNC should be inverted

#ifndef CONFIG_LCD_BMP 

extern const UINT8T g_ucBitmap[][76800];

#endif    //HBPD=47VCLK,HFPD=15VCLK,HSPW=95VCLK

    //VBPD=32HSYNC,VFPD=9HSYNC,VSPW=1HSYNC

 

#define LCDFRAMEBUFFER 0x31000000 //_NONCACHE_STARTADDRESS

    // 1. The LCD frame buffer should be write-through or non-cachable.

    // 2. The total frame memory should be inside 4MB.

    // 3. To meet above 2 conditions, the frame buffer should be

    // inside the following regions.

    // 0x31000000~0x313ffffff,

    // 0x31400000~0x317ffffff,

    // 0x31800000~0x31bffffff,

    //        .....   

    // 0x33800000~0x33bffffff       

 

// LCD CONTROLLER

#define rLCDCON1    (*(volatile unsigned *)0x4d000000) //LCD control 1

#define rLCDCON2    (*(volatile unsigned *)0x4d000004) //LCD control 2

#define rLCDCON3    (*(volatile unsigned *)0x4d000008) //LCD control 3

#define rLCDCON4    (*(volatile unsigned *)0x4d00000c) //LCD control 4

#define rLCDCON5    (*(volatile unsigned *)0x4d000010) //LCD control 5

#define rLCDSADDR1  (*(volatile unsigned *)0x4d000014) //STN/TFT Frame buffer start address 1

#define rLCDSADDR2  (*(volatile unsigned *)0x4d000018) //STN/TFT Frame buffer start address 2

#define rLCDSADDR3  (*(volatile unsigned *)0x4d00001c) //STN/TFT Virtual screen address set

#define rREDLUT     (*(volatile unsigned *)0x4d000020) //STN Red lookup table

#define rGREENLUT   (*(volatile unsigned *)0x4d000024) //STN Green lookup table

#define rBLUELUT    (*(volatile unsigned *)0x4d000028) //STN Blue lookup table

#define rDITHMODE   (*(volatile unsigned *)0x4d00004c) //STN Dithering mode

#define rTPAL       (*(volatile unsigned *)0x4d000050) //TFT Temporary palette

#define rLCDINTPND  (*(volatile unsigned *)0x4d000054) //LCD Interrupt pending

#define rLCDSRCPND  (*(volatile unsigned *)0x4d000058) //LCD Interrupt source

#define rLCDINTMSK  (*(volatile unsigned *)0x4d00005c) //LCD Interrupt mask

#define rLPCSEL     (*(volatile unsigned *)0x4d000060) //LPC3600 Control

#define PALETTE     0x4d000400                         //Palette start address

 

 

#define rGPCCON    (*(volatile unsigned *)0x56000020) //Port C control

#define rGPCDAT    (*(volatile unsigned *)0x56000024) //Port C data

#define rGPCUP     (*(volatile unsigned *)0x56000028) //Pull-up control C

                       

#define rGPDCON    (*(volatile unsigned *)0x56000030) //Port D control

#define rGPDDAT    (*(volatile unsigned *)0x56000034) //Port D data

#define rGPDUP     (*(volatile unsigned *)0x56000038) //Pull-up control D

 

#define rGPGCON    (*(volatile unsigned *)0x56000060) //Port G control

#define rGPGDAT    (*(volatile unsigned *)0x56000064) //Port G data

#define rGPGUP     (*(volatile unsigned *)0x56000068) //Pull-up control G

 

#define LCD_XSIZE_TFT_640480     (640)     

#define LCD_YSIZE_TFT_640480     (480)

#define HOZVAL_TFT_640480   (LCD_XSIZE_TFT_640480-1)

#define LINEVAL_TFT_640480   (LCD_YSIZE_TFT_640480-1)

#define SCR_XSIZE_TFT_640480     (LCD_XSIZE_TFT_640480*2)

#define SCR_YSIZE_TFT_640480     (LCD_YSIZE_TFT_640480*2)

 

UINT32T (*frameBuffer16BitTft640480)[SCR_XSIZE_TFT_640480/2];

void (*PutPixel)(UINT32T,UINT32T,UINT32T);

void (*BitmapView)(UINT8T *pBuffer);

void BitmapViewTft16Bit_640480(UINT8T *pBuffer);

extern void Lcd_port_init(void);

extern void Lcd_Port_Return(void);

unsigned save_rGPCUP,save_rGPCDAT,save_rGPCCON;

unsigned save_rGPDUP,save_rGPDDAT,save_rGPDCON;

 

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=0xaaaaa9aa;                                         // Initialize VD[7:0],LCDVF[2:0],VM,VFRAME,VLINE,VCLK,LEND

    rGPCCON=0xaaaaaaaa; 

rGPDUP=0xffffffff;                                          // Disable Pull-up register

    rGPDCON=0xaaaaaaaa;                                         // Initialize VD[23:8]

  //  uart_printf(" Initializing GPIO ports..........\n");

}

/***************************************************

* name:         Lcd_Port_Return()

* func:           Return lcd port configuration

****************************************/

void Lcd_Port_Return(void)

{

    rGPCCON=save_rGPCCON;

    rGPCDAT=save_rGPCDAT;

    rGPCUP=save_rGPCUP;

    rGPDCON=save_rGPDCON;

    rGPDDAT=save_rGPDDAT;

    rGPDUP=save_rGPDUP;

}

/*************************************************

* name:         _PutTft16Bit_640480()

* func:           put pixel to 16bpp 640*480 TFT

* para:           UINT32T x   --  x coordinate

*           UINT32T y   --  y coordinate

*           UINT32T c   --  color value         

*************************************************/

void _PutTft16Bit_640480(UINT32T x,UINT32T y,UINT32T c)

{

    if(x

      frameBuffer16BitTft640480[(y)][(x)/2]=( frameBuffer16BitTft640480[(y)][x/2]

        & ~(0xffff0000>>((x)%2)*16) ) | ( (c&0x0000ffff)<<((2-1-((x)%2))*16) );                     

}

 

 

void Lcd_Init(int type)

{

   

frameBuffer16BitTft640480=(UINT32T (*)[SCR_XSIZE_TFT_640480/2])LCDFRAMEBUFFER;

        rLCDCON1=(CLKVAL_TFT_640480<<8)|(MVAL_USED<<7)|(3<<5)|(12<<1)|0;

           

        // TFT LCD panel,16bpp TFT,ENVID=off

        rLCDCON2=(VBPD_640480<<24)|(LINEVAL_TFT_640480<<14)|(VFPD_640480<<6)|(VSPW_640480);

        rLCDCON3=(HBPD_640480<<19)|(HOZVAL_TFT_640480<<8)|(HFPD_640480);

        rLCDCON4=(MVAL<<8)|(HSPW_640480);

        rLCDCON5=(1<<11)|(1<<9)|(1<<8);                     //FRM5:6:5,HSYNC and VSYNC are inverted

        rLCDSADDR1=(((UINT32T)frameBuffer16BitTft640480>>22)<<21)|M5D((UINT32T)frameBuffer16BitTft640480>>1);

        rLCDSADDR2=M5D( ((UINT32T)frameBuffer16BitTft640480+(SCR_XSIZE_TFT_640480*LCD_YSIZE_TFT_640480*2))>>1 );

        rLCDSADDR3=(((SCR_XSIZE_TFT_640480-LCD_XSIZE_TFT_640480)/1)<<11)|(LCD_XSIZE_TFT_640480/1);

        rLCDINTMSK|=(3);                                    // MASK LCD Sub Interrupt

        rLPCSEL&=(~7);                                      // Disable LPC3600

        rTPAL=0;                                            // Disable Temp Palette

      

}

 

void Glib_Init(int type)

{ 

PutPixel=_PutTft16Bit_640480;

BitmapView=BitmapViewTft16Bit_640480;       

}

 

void Glib_ClearScr(UINT32T c, int type)

{     

    int i,j;

 

 // type:MODE_TFT_1BIT_640480|MODE_TFT_8BIT_640480|MODE_TFT_16BIT_640480

        for(j=0;j<20;j++)

            for(i=0;i<20;i++)

                PutPixel(i,j,c);

 

 

}

 

void Lcd_PowerEnable(int invpwren,int pwren)

{

    //GPG4 is setted as LCD_PWREN

    rGPGUP=rGPGUP&(~(1<<4))|(1<<4);                             // Pull-up disable

    rGPGCON=rGPGCON&(~(3<<8))|(3<<8);                           // GPG4=LCD_PWREN

   

    //Enable LCD POWER ENABLE Function

    rLCDCON5=rLCDCON5&(~(1<<3))|(pwren<<3);                     // PWREN

    rLCDCON5=rLCDCON5&(~(1<<5))|(invpwren<<5);                  // INVPWREN

} 

 

/************************************************************

* name:         Lcd_EnvidOnOff

* func:           lcd Envid onoff configuration

* para:           int onoff   --  Envid configuration

*******************************************************************/

void Lcd_EnvidOnOff(int onoff)

{

    if(onoff==1)

      rLCDCON1|=0x00000001;                                            // ENVID=ON            

else

      rLCDCON1 =rLCDCON1 & 0x3fffe;                           // ENVID Off

} 

 

/************************************************************

* name:         lcd_init_app

* func:           lcd application initialization code

**************************************************************/

void lcd_init_app()

{

    Lcd_port_init();

    Lcd_Init(MODE_TFT_16BIT_640480);

    Glib_Init(MODE_TFT_16BIT_640480);

    Glib_ClearScr(0, MODE_TFT_16BIT_640480);

    Lcd_PowerEnable(0, 1);

    Lcd_EnvidOnOff(1);        

}

 

/********************************************************

* name:         lcd_init_app_end

* func:           end lcd application initialization    

**********************************************************/

void lcd_init_app_end()

{

    Lcd_EnvidOnOff(0);

    Lcd_Port_Return();

}

 

/***********************************************************

* name:         lcd_clr_rect

* func:           fill appointed area with appointed color

* para:           usLeft,usTop,usRight,usBottom -- area's rectangle acme coordinate

*                    ucColor -- appointed color value

******************************************************************/

void lcd_clr_rect(INT16T usLeft, INT16T usTop, INT16T usRight, INT16T usBottom, UINT8T ucColor)

{

UINT32T i, j;

//      UINT8T *pDisp = (UINT8T*)LCD_ACTIVE_BUFFER;

for (i = usLeft; i < usRight; i++)

for (j = usTop; j < usBottom; j++)

{

        PutPixel(i,j,ucColor);

        //*(pDisp+i+j) = ucColor;

}

}

 

 

void lcd_clean(UINT32T c)

{

      UINT32T i, j;

UINT32T *pView = (UINT32T*)frameBuffer16BitTft640480;

 

for (i = 0; i < LCD_YSIZE_TFT_640480; i++)

{

  

  

   for (j = 0; j < LCD_XSIZE_TFT_640480/2 ; j++)

    {

     

      //pView[j] = ((*(pBuffer+3)) << 24) + ((*(pBuffer+2)) << 16) + ((*(pBuffer+1)) << 8) + (*(pBuffer));

        pView[j] = c;

          //pBuffer += 4;

   

              }

    pView+=LCD_XSIZE_TFT_640480;

}

 

   

}

/***********************************************************

* name:         color_lcd_test()

* func:           LCD test function      

**************************************************************/

void color_lcd_init(void)

{

      printf("lcd initial start\n");

lcd_init_app();   

lcd_clean(0x66665555);

printf("lcd initial end\n");  

}