point8.c

240128液晶驱动的测试程序

//点
void pointxy(unsigned char x,unsigned char y,unsigned char bitdata)      
{  Lcd_CurrentX=x;
   Lcd_CurrentY=y;
   lcdpos();
   if(bitdata==0)
      bitdata=0xf0+(0x7-(Lcd_CurrentX&0x7));
   else
      bitdata=0xf8+(0x7-(Lcd_CurrentX&0x7));
   lcdwc(bitdata);
}

//线
void linexy(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char bitdata)
{
   unsigned char i,k;
   if(abs(y1-y0)>abs(x1-x0))
   {  if(y1>y0)
         for(i=y0;i<=y1;i++)
         {  if(x1>x0)
            {  k=x1-x0;
               k*=(i-y0);
               k/=y1-y0;
               pointxy(x0+k,i,bitdata);
            }
            else  //x1<x0
            {  k=x0-x1;
               k*=(i-y0);
               k/=y1-y0;
               pointxy(x0-k,i,bitdata);
            }
         }
      else        //y1<y0
         for(i=y0;i>=y1;i--)
         {  if(x1>x0)
            {  k=x1-x0;
               k*=(y0-i);
               k/=y0-y1;
               pointxy(x0+k,i,bitdata);
            }
            else   //x1<x0
            {  k=x0-x1;
               k*=(y0-i);
               k/=y0-y1;
               pointxy(x0-k,i,bitdata);
            }
         }
   }
   else            //abs(y1-y0)<abs(x1-x0)
   {  if(x1>x0)
         for(i=x0;i<=x1;i++)
         {  if(y1==y0)
               pointxy(i,y0,bitdata);
            else if(y1>y0)
            {  k=y1-y0;
               k*=(i-x0);
               k/=x1-x0;
               pointxy(i,y0+k,bitdata);
            }
            else     //y1<y0
            {  k=y0-y1;
               k*=(i-x0);
               k/=x1-x0;
               pointxy(i,y0-k,bitdata);
            }
         }
      else
         for(i=x0;i>=x1;i--)
         {  if(y1==y0)
               pointxy(i,y0,bitdata);
            else if(y1>y0)
            {  k=y1-y0;
               k*=(x0-i);
               k/=x0-x1;
               pointxy(i,y0+k,bitdata);
            }
            else     //y1<y0
            {  k=y0-y1;
               k*=(x0-i);
               k/=x0-x1;
               pointxy(i,y0-k,bitdata);
            }
       }
  }
}

//矩形
void rect(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char bitdata)
{
   linexy(x0,y0,x0,y1,bitdata);
   linexy(x0,y0,x1,y0,bitdata);
   linexy(x0,y1,x1,y1,bitdata);
   linexy(x1,y0,x1,y1,bitdata);
}