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/********************************** LCD12864曲線顯示*******************************************/
/*********作者：王勝文。 email：nunk@163.com 希望與大家交流2017。08。03**********/
#include<avr/io.h>
#include<reg51.h>
#include<drive_functions.h>
#include<math.h>
//#include<get_keys.h>
#define Graphic_Clear 0x01 //檫除點(diǎn)
#define Graphic_Not 0x02 //反相點(diǎn)
#define Graphic_Draw 0x03 //畫點(diǎn)
uchar j=0,i=0;
uchar r=32;
/***********************在LCD上任意坐標(biāo)畫點(diǎn)********************************/
void DrawPoint(uchar X,uchar Y,uchar Type)
{ //X，Y化點(diǎn)的坐標(biāo)Type畫點(diǎn)的類型：反相點(diǎn)，檫除點(diǎn)，畫點(diǎn)
uchar DX = (Y >> 3); //計(jì)算出屬于哪個(gè)字節(jié)
uchar BX = Y - (DX << 3); //計(jì)算出屬于字節(jié)哪一位
uchar TempData = 0;
if (X > 63)
{
chip_select=2;
X -= 64;
}
else
{
chip_select=1;
}
SetPage(DX); //設(shè)行地址
SetColumn(X); //設(shè)列地址
TempData = ReadData(); //讀出所畫點(diǎn)所在字節(jié)的內(nèi)容
switch (Type) //對(duì)該字節(jié)進(jìn)行相應(yīng)操作
{
case Graphic_Clear:
TempData &= ~(1<<BX);
break;
case Graphic_Not:
TempData ^= (1 << BX);
break;
case Graphic_Draw:
TempData |= (1 << BX);
break;
default: break;
}
SetPage(DX); //設(shè)置行地址
SetColumn(X); //設(shè)置列地址
WriteData(TempData); //把修改后的字節(jié)送回LCD，達(dá)到畫點(diǎn)目的
}
/********插值法畫任意兩點(diǎn)之間直線的函數(shù)，函數(shù)中只用加減法，程序運(yùn)行效率很高**********/
DrawLine(uchar x1,uchar y1,uchar x2,uchar y2)
{ //x1,y1起點(diǎn)坐標(biāo)；x2,y2終點(diǎn)坐標(biāo)；
uchar x,y;
uchar d_x,d_y;
char err=0;
uchar temp=0;
if(y2<y1){x=x1;y=y1;x1=x2;y1=y2;x2=x;y2=y;}
d_y=y2-y1;
if (d_y==0)
{
if (x1>x2) {x=x1;x1=x2;x2=x;}
for ( x=x1;x<=x2;x++ ) DrawPoint(x,y1,Graphic_Draw);
}
else
{
if(x2>=x1){temp=1;d_x=x2-x1;}else d_x=x1-x2;
x=x1;y=y1;DrawPoint(x,y,Graphic_Draw);
if(temp&&(d_y<=d_x))
while(x!=x2)
{if(err<0){x=x+1;err=err+(y2-y);}
else {x=x+1;y=y+1;err=err+(y2-y)-(x2-x);}
DrawPoint(x,y,Graphic_Draw);
}
else if(temp&&(d_y>d_x))
while(y!=y2)
{d_x=x2-x;d_y=y2-y;
if(err<0){x=x+1;y=y+1;err=err+d_y-d_x;}
else {y=y+1;err=err-d_x;}
DrawPoint(x,y,Graphic_Draw);
}
else if(!temp&&(d_y<=d_x))
while(x!=x2)
{d_x=x-x2;d_y=y2-y;
if(err<0){x=x-1;err=err+d_y;}
else {x=x-1;y=y+1;err=err+d_y-d_x;}
DrawPoint(x,y,Graphic_Draw);
}
else if(!temp &&(d_y>d_x))
while(y!=y2)
{d_x=x-x2;d_y=y2-y;
if(err<0){x=x-1;y=y+1;err=err+d_y-d_x;}
else {y=y+1;err=err-d_x;}
DrawPoint(x,y,Graphic_Draw);
}
}
}
/***********************************************************************/
void DrawLevel(void)
{
for(i=0;i<127;i++){DrawPoint(i,32,Graphic_Draw);}//畫水平直線
}
/************************************************************************************/
void DrawSineWave(void)
{
uchar xn=0;
uchar yn=32;
uchar i;
uchar xi,yi;
for(i=0;i<127;i++)
{
xi=i;
yi=(sin(i*0.1)*32)+32;
DrawLine(xn,yn,xi,yi); //在一系列零散的點(diǎn)上，兩點(diǎn)兩點(diǎn)之間連線，從而得到一條曲線
xn=i;
yn=yi;
}
}
/*************************************************************************************/
void DrawCircle(uchar x0,uchar y0,uchar r)//x0,y0為圓心坐標(biāo)，r為圓半徑
{
uchar xn,yn,xi,yi;
unsigned int j;
xn=cos(0)*r+x0;
yn=sin(0)*r+y0;
for(j=0;j<630;j++)
{
xi=(cos(j*0.01)*r)+x0;
yi=(sin(j*0.01)*r)+y0;
DrawLine(xn,yn,xi,yi); //在一系列零散的點(diǎn)上，兩點(diǎn)兩點(diǎn)之間連線，從而得到一條曲線
xn=xi;
yn=yi;
}
}
/**************************************************************************************************/
void DrawRetic(uchar x0,uchar y0,uchar x1,uchar y1)//畫正方形，x0,y0為左上角坐標(biāo)，x1,y1為右下角坐標(biāo)
{
uchar i;
for(i=0;i<=x1-x0;i++){ DrawPoint(x0+i,y0,Graphic_Draw); DrawPoint(x0+i,y1,Graphic_Draw); }
for(i=0;i<=y1-y0;i++){ DrawPoint(x0,y0+i,Graphic_Draw); DrawPoint(x1,y0+i,Graphic_Draw); }
}
/**************************************************************************************************/
void DrawTrigle(uchar x1,uchar y1,uchar x2,uchar y2,uchar x3,uchar y3)//畫三角形，三個(gè)坐標(biāo)為三角形頂點(diǎn)
{
DrawLine(x1,y1,x2,y2);
DrawLine(x2,y2,x3,y3);
DrawLine(x1,y1,x3,y3);
}
/******************************** main **********************************************************/
void main(void)
{
ClearLCD();
while(1)
{
ClearLCD();
//DrawLevel();
//DrawLine(0,63,127,0);
DrawSineWave();
//DrawCircle(63,32,r);
//r-=4;
//}
//DrawRetic(10,10,30,30);
//DrawTrigle(12,23,80,60,120,6);
DrawRetic(5,5,120,60);
}
}

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