S5PV210之LCD畫圖、字符串、顯示圖…

        這個週末又獻給了S5PV210。以前在學習裸機的時候並沒意識發博客記錄學習過程。當遇到自己特別感興趣又需要學習的知識時，就會有很強的感覺去記錄自己學習道路上的每一處風景。這兩天終於學會了操作LCD，底層自己編寫。下面是研究開發板的收穫，爲以後打下基礎。本文不具體講解LCD基礎知識，直接上實戰代碼。

        先上效果圖：1、畫斜線和圓；2、顯示字符（串）；3、在顯存上顯示圖片。圖片後面貼出自己的所有400多行代碼，僅供學習者在編程LCD時參考。說明：畫斜線和圓的算法均爲移植。

        PS：由於博客會自動調整編程代碼格式，所以本文不具體細調代碼格式。

 

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

#include "main.h"

#include "ascii.h"     //字符取模後存的二進制位信息

#include "800480.h"//圖片取模後存的二進制位信息，利用Image2Lcd圖片取模軟件

#define GPF0CON         (*(volatile unsigned long *)0xE0200120)

#define GPF1CON         (*(volatile unsigned long *)0xE0200140)

#define GPF2CON         (*(volatile unsigned long *)0xE0200160)

#define GPF3CON         (*(volatile unsigned long *)0xE0200180)

#define GPD0CON        (*(volatile unsigned long *)0xE02000A0)

#define GPD0DAT         (*(volatile unsigned long *)0xE02000A4)

#define CLK_SRC1         (*(volatile unsigned long *)0xe0100204)

#define CLK_DIV1          (*(volatile unsigned long *)0xe0100304)

#define DISPLAY_CONTROL       (*(volatile unsigned long *)0xe0107008)

#define VIDCON0           (*(volatile unsigned long *)0xF8000000)

#define VIDCON1           (*(volatile unsigned long *)0xF8000004)

#define VIDTCON2         (*(volatile unsigned long *)0xF8000018)

#define WINCON0          (*(volatile unsigned long *)0xF8000020)

#define WINCON2          (*(volatile unsigned long *)0xF8000028)

#define SHADOWCON   (*(volatile unsigned long *)0xF8000034)

#define VIDOSD0A         (*(volatile unsigned long *)0xF8000040)

#define VIDOSD0B          (*(volatile unsigned long *)0xF8000044)

#define VIDOSD0C          (*(volatile unsigned long *)0xF8000048)

#define VIDW00ADD0B0    (*(volatile unsigned long *)0xF80000A0)

#define VIDW00ADD1B0    (*(volatile unsigned long *)0xF80000D0)

#define VIDTCON0              (*(volatile unsigned long *)0xF8000010)

#define VIDTCON1              (*(volatile unsigned long *)0xF8000014)

#define HSPW (40) // 1~40 DCLK

#define HBPD (10 - 1) // 46

#define HFPD (240 - 1) // 16 210 354

#define VSPW (20) // 1~20 DCLK

#define VBPD (10 - 1) // 23

#define VFPD (30 - 1) // 7 22 147

// FB地址

#define FB_ADDR (0x23000000)        //顯存地址設置，可爲0x25000000

#define ROW (480)

#define COL (800)

#define HOZVAL (COL-1)

#define LINeval_r(ROW-1)

#define XSIZE COL

#define YSIZE ROW

u32 *pfb = (u32 *)FB_ADDR;    //顯存地址與屏幕像素相綁定

// 常用顏色定義

#define BLUE 0x0000FF

#define RED 0xFF0000

#define GREEN 0x00FF00

#define WHITE 0xFFFFFF

#define LeftTopX     0

#define LeftTopY     0

#define RightBotX   799

#define RightBotY   479

// 初始化LCD

static void lcd_init(void)

{

// 配置引腳用於LCD功能

GPF0CON = 0x22222222;

GPF1CON = 0x22222222;

GPF2CON = 0x22222222;

GPF3CON = 0x22222222;

// 打開背光 GPD0_0（PWMTOUT0）

GPD0CON &= ~(0xf<<0);

GPD0CON |= (1<<0); // output mode

GPD0DAT &= ~(1<<0); // output 0 to enable backlight

// 10: RGB=FIMD I80=FIMD ITU=FIMD

DISPLAY_CONTROL = 2<<0;

// bit[26~28]:使用RGB接口

// bit[18]:RGB 並行

// bit[2]:選擇時鐘源爲HCLK_DSYS=166MHz

VIDCON0 &= ~( (3<<26)|(1<<18)|(1<<2) );

// bit[1]:使能lcd控制器

// bit[0]:當前幀結束後使能lcd控制器

VIDCON0 |= ( (1<<0)|(1<<1) );

// bit[6]:選擇需要分頻

// bit[6~13]:分頻係數爲5，即VCLK = 166M/(4+1) = 33M

VIDCON0 |= 4<<6 | 1<<4;

// H43-HSD043I9W1.pdf(p13) 時序圖：VSYNC和HSYNC都是低脈衝

// s5pv210芯片手冊(p1207) 時序圖：VSYNC和HSYNC都是高脈衝有效，所以需要反轉

VIDCON1 |= 1<<5 | 1<<6;

// 設置時序

VIDTCON0 = VBPD<<16 | VFPD<<8 | VSPW<<0;

VIDTCON1 = HBPD<<16 | HFPD<<8 | HSPW<<0;

// 設置長寬(物理屏幕)

VIDTCON2 = (LINEVAL << 11) | (HOZVAL << 0);

// 設置window0

// bit[0]:使能

// bit[2~5]:24bpp（RGB888）

WINCON0 |= 1<<0;

WINCON0 &= ~(0xf << 2);

WINCON0 |= (0xB<<2) | (1<<15);

// 設置window0的上下左右

// 設置的是顯存空間的大小

VIDOSD0A = (LeftTopX<<11) | (LeftTopY << 0);

VIDOSD0B = (RightBotX<<11) | (RightBotY << 0);

VIDOSD0C = (LINEVAL + 1) * (HOZVAL + 1);

// 設置fb的地址

VIDW00ADD0B0 = FB_ADDR;

VIDW00ADD1B0 = (((HOZVAL + 1)*4 + 0) * (LINEVAL + 1)) & (0xffffff);

// 使能channel 0傳輸數據

SHADOWCON = 0x1;

}

// 在像素點(x, y)處填充爲color顏色

static inline void lcd_draw_pixel(u32 x, u32 y, u32 color)

{

*(pfb + COL * y + x) = color;

}

// 把整個屏幕全部填充成一個顏色color

static void lcd_draw_background(u32 color)

{

u32 i, j;

for (j=0; j

{

for (i=0; i

{

lcd_draw_pixel(i, j, color);

}

}

}

static void delay(void)

{

volatile u32 i, j;

for (i=0; i<4000; i++)

for (j=0; j<1000; j++);

}

// 繪製橫線，起始座標爲(x1, y)到(x2, y),顏色是color

static void lcd_draw_hline(u32 x1, u32 x2, u32 y, u32 color)

{

u32 x;

for (x = x1; x

{

lcd_draw_pixel(x, y, color);

}

}

// 繪製豎線，起始座標爲(x, y1)到(x, y2),顏色是color

static void lcd_draw_vline(u32 x, u32 y1, u32 y2, u32 color)

{

u32 y;

for (y = y1; y

{

lcd_draw_pixel(x, y, color);

}

}

// glib庫中的畫線函數，可以畫斜線，線兩端分別是(x1, y1)和(x2, y2)

void glib_line(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2, unsigned int color)

{

int dx,dy,e;

dx=x2-x1; 

dy=y2-y1;

    

if(dx>=0)

{

if(dy >= 0) // dy>=0

{

if(dx>=dy) // 1/8 octant

{

e=dy-dx/2;  

while(x1<=x2)

{

lcd_draw_pixel(x1,y1,color);

if(e>0){y1+=1;e-=dx;}

x1+=1;

e+=dy;

}

}

else // 2/8 octant

{

e=dx-dy/2;

while(y1<=y2)

{

lcd_draw_pixel(x1,y1,color);

if(e>0){x1+=1;e-=dy;}

y1+=1;

e+=dx;

}

}

}

else   // dy<0

{

dy=-dy;   // dy=abs(dy)

if(dx>=dy) // 8/8 octant

{

e=dy-dx/2;

while(x1<=x2)

{

lcd_draw_pixel(x1,y1,color);

if(e>0){y1-=1;e-=dx;}

x1+=1;

e+=dy;

}

}

else // 7/8 octant

{

e=dx-dy/2;

while(y1>=y2)

{

lcd_draw_pixel(x1,y1,color);

if(e>0){x1+=1;e-=dy;}

y1-=1;

e+=dx;

}

}

}

}

else //dx<0

{

dx=-dx; //dx=abs(dx)

if(dy >= 0) // dy>=0

{

if(dx>=dy) // 4/8 octant

{

e=dy-dx/2;

while(x1>=x2)

{

lcd_draw_pixel(x1,y1,color);

if(e>0){y1+=1;e-=dx;}

x1-=1;

e+=dy;

}

}

else // 3/8 octant

{

e=dx-dy/2;

while(y1<=y2)

{

lcd_draw_pixel(x1,y1,color);

if(e>0){x1-=1;e-=dy;}

y1+=1;

e+=dx;

}

}

}

else   // dy<0

{

dy=-dy;   // dy=abs(dy)

if(dx>=dy) // 5/8 octant

{

e=dy-dx/2;

while(x1>=x2)

{

lcd_draw_pixel(x1,y1,color);

if(e>0){y1-=1;e-=dx;}

x1-=1;

e+=dy;

}

}

else // 6/8 octant

{

e=dx-dy/2;

while(y1>=y2)

{

lcd_draw_pixel(x1,y1,color);

if(e>0){x1-=1;e-=dy;}

y1-=1;

e+=dx;

}

}

}

}

}

//畫圓函數，圓心座標是(centerX, centerY)，半徑是radius，圓的顏色是color

void draw_circular(unsigned int centerX, unsigned int centerY, unsigned int radius, unsigned int color)

{

int x,y ;

int tempX,tempY;;

    int SquareOfR = radius*radius;

for(y=0; y

{

for(x=0; x

{

if(y<=centerY && x<=centerX)

{

tempY=centerY-y;

tempX=centerX-x;                        

}

else if(y<=centerY&& x>=centerX)

{

tempY=centerY-y;

tempX=x-centerX;                        

}

else if(y>=centerY&& x<=centerX)

{

tempY=y-centerY;

tempX=centerX-x;                        

}

else

{

tempY = y-centerY;

tempX = x-centerX;

}

if ((tempY*tempY+tempX*tempX)<=SquareOfR)

lcd_draw_pixel(x, y, color);

}

}

}

// 寫字

// 寫字的左上角座標(x, y)，字的顏色是color，字的字模信息存儲在data中

static void show_8_16(unsigned int x, unsigned int y, unsigned int color, unsigned char *data)  

{  

// count記錄當前正在繪製的像素的次序

    int i, j, count = 0;  

 

    for (j=y; j<(y+16); j++)  

    {  

        for (i=x; i<(x+8); i++)  

        {  

            if (i

            {  

        // 在座標(i, j)這個像素處判斷是0還是1，如果是1寫color；如果是0直接跳過

            if (data[count/8] & (1<<(count%8)))   

                 lcd_draw_pixel(i, j, color);

            }  

            count++;  

        }  

    }  

} 

// 寫字符串

// 字符串起始座標左上角爲(x, y)，字符串文字顏色是color,字符串內容爲str

void draw_ascii_ok(unsigned int x, unsigned int y, unsigned int color, unsigned char *str)

{

int i;  

unsigned char *ch;

       for (i=0; str[i]!='\0'; i++)  

      {  

         ch = (unsigned char *)ascii_8_16[(unsigned char)str[i]-0x20];

         show_8_16(x, y, color, ch); 

         x += 8;

         if (x >= XSIZE) //判斷是否超出屏幕範圍

           {

                 x -= XSIZE; // 回車

                 y += 16; // 換行

            }

      }  

}

//畫圖片,圖像數據存在指針指向的數組裏面

void lcd_draw_picture(const unsigned char *pData)

{

u32 x,y,color,p=0;

for (y=0;y<480;y++)

{

for(x=0;x<800;x++)

{

color= (pData[p+2]<<0)|(pData[p+1]<<8)|(pData[p+0]<<16);

lcd_draw_pixel(x,y,color);

p+=3;

}

}

}

void lcd_test(void)

{

lcd_init();

//顯示圖片

lcd_draw_picture(gImage_800480);

/ *

//測試寫英文字母

lcd_draw_background(WHITE);

draw_ascii_ok(0, 0, RED, "ABCDabcd1234!@#$%");

* /

/ *

// 測試畫斜線

lcd_draw_background(WHITE); // 如果沒有加這一行，背景色是花花綠綠的

glib_line(0, 479, 799, 0, RED);

draw_circular(399, 239, 50, GREEN);

*/

/ *

// 測試畫橫線、豎線

lcd_draw_background(WHITE);

lcd_draw_hline(350, 450, 240, RED);

lcd_draw_vline(400, 190, 290, GREEN);

* /

/ *

// 測試繪製背景色，成功

while (1)

{

lcd_draw_background(RED);

delay();

lcd_draw_background(GREEN);

delay();

lcd_draw_background(BLUE);

delay();

}

* /

}

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

//建立main.c文件，調用上面的功能函數

#include "main.h"

int main(void)

{

lcd_test();

return 0;

}