TFTLCD彩屏液晶驅(qū)動二畫點畫線畫圓

第頁//lcd.h寄存器定義，參照上個程序

#include"lcd.h"void(*printf)(char*,...)=0x33f9291C;

staticunsignedshort*fb=0x32000000;//數(shù)據(jù)手冊413頁

//5:6:5格式,去除低位可以減少誤差

#defineRGB565(r,g,b)((r>>3)<<11|(g>>2)<<5|(b>>3))voidclr_fb(void);

voidfill_fb(intstart_x,intend_x,intstart_y,intend_y,unsignedshortval);

voiddraw_point(intx,inty,intclor);

voiddraw_line(intx1,inty1,intx2,inty2,intcolor);

voiddraw_circle(intx,inty,intr,intcolor);void_start(void)

{

//LCD初始化，參照上個程序

init_lcd();//startlcd

LCDCON1|=ENVID(1);

LCDCON5|=PWREN(1);//清屏幕

clr_fb();//畫奧運(yùn)5色環(huán)

draw_circle(35,35,35,RGB565(0,0,255));

draw_circle(115,35,35,RGB565(0,255,255));

draw_circle(195,35,35,RGB565(255,0,0));

draw_circle(70,70,35,RGB565(255,255,0));

draw_circle(150,70,35,RGB565(0,255,0));//畫奧運(yùn)下面的正四方形

draw_line(90,150,140,150,RGB565(255,0,255));

draw_line(90,150,90,200,RGB565(255,0,255));

draw_line(90,200,140,200,RGB565(255,0,255));

draw_line(140,150,140,200,RGB565(255,0,255));

//畫奧運(yùn)下面的斜45度四方形

draw_line(115,140,80,175,RGB565(255,0,255));

draw_line(80,175,115,210,RGB565(255,0,255));

draw_line(115,210,150,175,RGB565(255,0,255));

draw_line(150,175,115,140,RGB565(255,0,255));//畫縱坐標(biāo)

draw_line(250,250,479,250,RGB565(255,255,0));

draw_line(479,250,465,240,RGB565(255,255,0));

draw_line(479,250,465,260,RGB565(255,255,0));

//畫橫坐標(biāo)

draw_line(250,1,250,250,RGB565(255,255,0));

draw_line(250,1,240,15,RGB565(255,255,0));

draw_line(250,1,260,15,RGB565(255,255,0));//畫條形

fill_fb(280,320,100,250,RGB565(255,0,0));

fill_fb(320,340,120,250,RGB565(0,200,0));fill_fb(380,420,50,250,RGB565(255,0,255));

fill_fb(420,440,150,250,RGB565(0,255,255));

printf("hellolcd\n");

}//畫點函數(shù)。參數(shù)：坐標(biāo),顏色

voiddraw_point(intx,inty,intclor)

{

fb[y*480+x]=clor;

}//畫圓函數(shù)。參數(shù)：圓心，半徑，顏色

//畫1/8圓然后其他7/8對稱畫

//>X

//|(0,0)0

//|71

//|62

//|53

//(Y)V4

//

//L=x^2+y^2-r^2

voiddraw_circle(intx,inty,intr,intcolor)

{

inta,b,num;

a=0;

b=r;

while(2*b*b>=r*r)//1/8圓即可

{

draw_point(x+a,y-b,color);//0~1

draw_point(x-a,y-b,color);//0~7

draw_point(x-a,y+b,color);//4~5

draw_point(x+a,y+b,color);//4~3draw_point(x+b,y+a,color);//2~3

draw_point(x+b,y-a,color);//2~1

draw_point(x-b,y-a,color);//6~7

draw_point(x-b,y+a,color);//6~5

a++;

num=(a*a+b*b)-r*r;

if(num>0)

{

b--;

a--;

}

}

}//畫線。參數(shù)：起始坐標(biāo)，終點坐標(biāo)，顏色

voiddraw_line(intx1,inty1,intx2,inty2,intcolor)

{

intdx,dy,e;

dx=x2-x1;

dy=y2-y1;

if(dx>=0)

{

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

{

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

{

e=dy-dx/2;

while(x1<=x2)

{

draw_point(x1,y1,color);

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

x1+=1;

e+=dy;

}

}

else//2/8octant

{

e=dx-dy/2;

while(y1<=y2)

{

draw_point(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)//8/8octant

{

e=dy-dx/2;

while(x1<=x2)

{

draw_point(x1,y1,color);

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

x1+=1;

e+=dy;

}

}

else//7/8octant

{

e=dx-dy/2;

while(y1>=y2)

{

draw_point(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)//4/8octant

{

e=dy-dx/2;

while(x1>=x2)

{

draw_point(x1,y1,color);

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

x1-=1;

e+=dy;

}

}

else//3/8octant

{

e=dx-dy/2;

while(y1<=y2)

{

draw_point(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)//5/8octant

{

e=dy-dx/2;

while(x1>=x2)

{

draw_point(x1,y1,color);

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

x1-=1;

e+=dy;

}

}

else//6/8octant

{

e=dx-dy/2;

while(y1>=y2)

{

draw_point(x1,y1,color);

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

y1-=1;

e+=dx;

}

}

}

}

}//區(qū)域填色函數(shù)

//參數(shù)：開始列數(shù)，結(jié)束列數(shù)，開始行數(shù)，結(jié)束行數(shù)，顏色

voidfill_fb(intstart_x,intend_x,intstart_y,intend_y,unsignedshortval)

{

inti,j;

fo