原创 AVR(Mega8)的study:13、点亮LCD3510液晶画圆

上一篇讲了画矩形及多边形，以及实块，由于资源问题没能将画圆及圆形实块等加上，这次分开说一下。

效果图：（由于液晶像素点不是正方形，所以看起来圆有点椭，呵呵！）

//lcd3510.c

#include <iom8v.h>
#include "mytype.h"
#include "math.h"
#include "lcd3510.h"

void DelayXms(uint16 x)
{
 uint8 i;
 while(x--)
  {
   i="1275";
   while(i--);
  }
}

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

************
 液晶硬件复位
*****************************************************************************

*/
void LcdReset(void)
{
 ClrLcdRst();
 DelayXms(5);
 SetLcdRst();
 DelayXms(5);
}
/****************************************************************************

**********************
 发送命令
 

*****************************************************************************

*************************/
void LcdSendCommand(uint8 cmd)
{
 uint8 i;
 SetSdataOut();
 ClrLcdCs();
 ClrLcdSclk();
 ClrLcdSdata();
 SetLcdSclk();
 
 for(i=0;i<8;i++)
  {
   ClrLcdSclk();
   if(cmd & 0x80)
    {
     SetLcdSdata();
    }
   else
    {
     ClrLcdSdata();
    }
   SetLcdSclk();
   cmd<<=1;
  }
}

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

*
发送数据
*****************************************************************************

***********/
void LcdSendData(uint32 Data)
{
 uint32 i;
 SetSdataOut();
 ClrLcdCs();
 ClrLcdSclk();
 SetLcdSdata();
 SetLcdSclk();

 for(i=0;i<8;i++)
  {
   ClrLcdSclk();
   if(Data & 0x80)
    {
     SetLcdSdata();
    }
   else
    {
     ClrLcdSdata();
    }
   SetLcdSclk();
   Data<<=1;
  }
}
/***************************************************************************
液晶端口初始化
************************************************************************/
void LcdPortInit(void)
{
DDR4|=((1<<LCD_RST)|(1<<LCD_CS));
DDR2|=((1<<LCD_SDATA)|(1<<LCD_SCLK));
SetLcdRst();
SetLcdCs();
SetLcdSclk();
}

/**********************************************************************
液晶初始化 
*************************************************************************/
void LcdInit(void)
{
 uint8 i;
 LcdPortInit();

 LcdReset();
 LcdSendCommand(0x01);  //soft reset
 SetLcdCs();
 
 DelayXms(5);
 LcdSendCommand(0xc6);     //initial escape
 SetLcdCs();

 LcdSendCommand(0xb9);  //refresh set
 LcdSendData(0x00);
 SetLcdCs();

 LcdSendCommand(0xb6);  //display control
 LcdSendData(0x80);
 LcdSendData(0x80);
 LcdSendData(0x81);
 LcdSendData(84);
 LcdSendData(69);
 LcdSendData(82);
 LcdSendData(67);
 SetLcdCs();

 LcdSendCommand(0xb3);  //gray scale position set
 LcdSendData(1);
 LcdSendData(2);
 LcdSendData(4);
 LcdSendData(8);
 LcdSendData(16);
 LcdSendData(30);
 LcdSendData(40);
 LcdSendData(50);
 LcdSendData(60);
 LcdSendData(70);
 LcdSendData(80);
 LcdSendData(90);
 LcdSendData(100);
 LcdSendData(110);
 LcdSendData(127);
 SetLcdCs();

 LcdSendCommand(0xb5);  //gamma curve set
 LcdSendData(0x01);
 SetLcdCs();

 LcdSendCommand(0xbd);  //common driver output select
 LcdSendData(0x00);
 SetLcdCs();

 LcdSendCommand(0xbe);  //power control
 LcdSendData(0x04);
 SetLcdCs();

 LcdSendCommand(0x11);  //sleep out
 SetLcdCs();
 
 LcdSendCommand(0xba);  //voltage control
 LcdSendData(127);
 LcdSendData(3);
 SetLcdCs();

 LcdSendCommand(0xb7);  //temperature gradient set
 for(i=0; i<14; i++)
  {
   LcdSendData(0x00);
  }
 SetLcdCs();

 LcdSendCommand(0x29);  //display ON
 SetLcdCs();

 LcdSendCommand(0x03);  //booster voltage ON
 SetLcdCs();
 DelayXms(5);

 LcdSendCommand(0x20);  //display inversion OFF
 SetLcdCs();
 
 LcdSendCommand(0x25);  //write contrast
 LcdSendData(63);
 SetLcdCs();
}
/* ************************************************************************
液晶清屏 
*****************************************************************************

/
void LcdClr(void)
{
 uint8 x, y;
 LcdSendCommand(0x2a);  //column address set
 LcdSendData(0);
 LcdSendData(97);
 SetLcdCs();

 LcdSendCommand(0x2b);  //page address set
 LcdSendData(0);
 LcdSendData(66);
 SetLcdCs();
 
 LcdSendCommand(0x2c);  //memory write
 for(y=0;y<67;y++)
  {
   for(x=0;x<98;x+=2)
    {
     LcdSendData(0);
     LcdSendData(0);
     LcdSendData(0);
    }
  }
 SetLcdCs();
}

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

***************
 画点
 

*****************************************************************************

**************/
 void LcdPointWrite(uint8 x, uint8 y,uint8 rr,uint8 gg,uint8 bb)
 {
 uint8 b1,b2;
 b1=~(((rr<<4)&0xf0)|(gg&0x0f));
 b2=~(((bb<<4)&0xf0)|(rr&0x0f));
 LcdSendCommand(0x2a);  //column address set
 LcdSendData(x);
 LcdSendData(x);
 SetLcdCs();

 LcdSendCommand(0x2b);  //page address set
 LcdSendData(y);
 LcdSendData(y);
 SetLcdCs();

 LcdSendCommand(0x2c);  //memory write
 
     LcdSendData(b1);
     LcdSendData(b2);
 SetLcdCs(); 
}
/***************************************************************************
画线  
*****************************************************************************

/
void LCD_DrawLine(uint8 x1, uint8 y1, uint8 x2, uint8 y2,uint8 rr,uint8

gg,uint8 bb)
{
uint8 x,y;
if(x1<x2)
  for(x=x1;x<=x2;x++)
    {
 if(y1<=y2)
      { y="y1"+(uint16)((x-x1)*(y2-y1))/(x2-x1);
       LcdPointWrite(x,y,rr,gg,bb);}
 else
   {y=y1-(uint16)((x-x1)*(y1-y2))/(x2-x1);
     LcdPointWrite(x, y,rr,gg,bb);}
    }
else if(x1==x2)
     { x="x1";
      if(y1<=y2)
        {for(y=y1;y<=y2;y++)
        LcdPointWrite(x, y,rr,gg,bb);}
      else {
      for(y=y2;y<=y1;y++)
         LcdPointWrite(x, y,rr,gg,bb);}
      }
 else  for(x=x2;x<=x1;x++)
     {
   if(y1>=y2)
        { y="y1-"(uint16)((x1-x)*(y1-y2))/(x1-x2);
         LcdPointWrite(x, y,rr,gg,bb);}
   else
      {y=y1+(uint16)((x1-x)*(y2-y1))/(x1-x2);
   LcdPointWrite(x, y,rr,gg,bb);}
       }

if(y1<y2)
  for (y=y1;y<=y2;y++)
  {
  if(x1<=x2)
    {x=x1+(uint16)((y-y1)*(x2-x1))/(y2-y1);
  LcdPointWrite(x, y,rr,gg,bb);}
   else
     {x=x1-(uint16)((y-y1)*(x1-x2))/(y2-y1);
  LcdPointWrite(x, y,rr,gg,bb);}
   }
else if(y1==y2)
   {y=y1;
    if(x1<=x2)
    {for(x=x1;x<=x2;x++)
    LcdPointWrite(x, y,rr,gg,bb);}
 else
    {for(x=x2;x<=x1;x++)
    LcdPointWrite(x, y,rr,gg,bb);}
 }
else 
   for(y=y2;y<=y1;y++)
   {
   if(x1<=x2)
     {x=x1+(uint16)((y1-y)*(x2-x1))/(y1-y2);
      LcdPointWrite(x, y,rr,gg,bb);}
   else 
     {x=x1-(uint16)((y1-y)*(x1-x2))/(y1-y2);
      LcdPointWrite(x, y,rr,gg,bb);}
   }  
} 

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

******
画圆  
*****************************************************************************

******/

void LCD_Drawcir(uint8 x1,uint8 y1,uint8 r,uint8 rr,uint8 gg,uint8 bb)
{
uint8 x,y;
if(x1>=r)
   x=(x1-r);
else
   x="0";
for(x;x<=(x1+r);x++)
   {y=sqrt((uint16)(r*r)-(uint16)((x-x1)*(x-x1)))+y1;
   if((y-2*sqrt((uint16)(r*r)-(uint16)((x-x1)*(x-x1))))<0)
       LcdPointWrite(x, y,rr,gg,bb);
  else
      {LcdPointWrite(x, y,rr,gg,bb);
       LcdPointWrite(x,(y-2*sqrt((uint16)(r*r)-(uint16)((x-x1)*(x-x1))))

,rr,gg,bb); }
    }
if(y1>=r)
     y=(y1-r);
else
     y="0";
for(y;y<=(y1+r);y++)
   {x=sqrt((uint16)(r*r)-(uint16)((y-y1)*(y-y1)))+x1;
   if((x-2*sqrt((uint16)(r*r)-(uint16)((y-y1)*(y-y1))))<0)
       LcdPointWrite(x, y,rr,gg,bb);
  else
      { LcdPointWrite(x, y,rr,gg,bb);
        LcdPointWrite((x-2*sqrt((uint16)(r*r)-(uint16)((y-y1)*(y-y1)))),y

,rr,gg,bb);}
    } 
}
/**************************************************************************
圆形实块   
*****************************************************************************

*****/

void LCD_Drawfilledcir(uint8 x1,uint8 y1,uint8 r,uint8 rr,uint8 gg,uint8 bb)
{

uint8 x,y;
if(x1>=r)
 x=(x1-r);
else
 x=0;
for(x;x<=(x1+r);x++)
   {y=sqrt((uint16)(r*r)-(uint16)((x-x1)*(x-x1)))+y1;
   if((y-2*sqrt((uint16)(r*r)-(uint16)((x-x1)*(x-x1))))<0)
       LCD_DrawLine(x,0,x,y,rr,gg,bb);
   else
       LCD_DrawLine(x,(y-2*sqrt((uint16)(r*r)-(uint16)((x-x1)*(x-

x1)))),x,y,rr,gg,bb);
    }
if(y1>=r)
   y=(y1-r);
else
   y="0";
for(y;y<=(y1+r);y++)
   {x=sqrt((uint16)(r*r)-(uint16)((y-y1)*(y-y1)))+x1;
   if((x-2*sqrt((uint16)(r*r)-(uint16)((y-y1)*(y-y1))))<0)
       LCD_DrawLine(x,0,x,y,rr,gg,bb);
   else
       LCD_DrawLine((x-2*sqrt((uint16)(r*r)-(uint16)((y-y1)*(y-

y1)))),y,x,y,rr,gg,bb);
    } 
}