{   if(y1>y0) YPOS++;else YPOS--;
            dx++;
            if(x1>x0) XPOS=x0+(dk*dx+dy/2)/dy;else XPOS=x0-(dk*dx+dy/2)/dy;
            point(b);
        }
    }
}
//-------------------------------------------------------------------------------
//子程序名稱:void lineto(unsigned char x1,unsigned char y1,bit b)
//功能:按b的數據繪制(XPOS,YPOS)-(x1,y1)的直線
//修改日期:2009.8.18
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lineto(unsigned char x1,unsigned char y1,bit b)//繪制(XPOS,YPOS)-(X1,Y1)的直線
{   line(XPOS,YPOS,x1,y1,b);
}
//-------------------------------------------------------------------------------
//子程序名稱:void rect(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,bit b)
//功能:按b的數據繪制(x0,y0)-(x1,y1)的矩形
//修改日期:2009.8.18
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void rect(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,bit b)
{   line(x0,y0,x1,y0,b);
    line(x1,y0,x1,y1,b);
    line(x1,y1,x0,y1,b);
    line(x0,y1,x0,y0,b);
}
//-------------------------------------------------------------------------------
//以下lcdfill,lcdpos,lcdreset為KS0108B型硬件接口的19264液晶顯示模塊的基本子程序
//-------------------------------------------------------------------------------
//子程序名稱:void lcdfill(unsigned char d).
//功能:整屏顯示d表示的字節數據.
//修改日期:2009.08.31
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdfill(unsigned char d)           //整屏顯示d代表的字節數據子程序
{   unsigned char j;
    for(YPOS=0;YPOS<64;YPOS+=8)         //8頁
    {   XPOS=0;
        lcdpos();
        for(j=0;j<64;j++)              //64列
            lcdwd1(d);                 //送圖形數據
        XPOS=64;
        lcdpos();
        for(j=0;j<64;j++)              //64列
            lcdwd2(d);                 //送圖形數據
        XPOS=128;
        lcdpos();
        for(j=0;j<64;j++)              //64列
            lcdwd3(d);                 //送圖形數據
    }
    XPOS=0;
    YPOS=0;
}
//-------------------------------------------------------------------------------
//子程序名稱:void lcdpos(void).
//功能:設置坐標點(XPOS,YPOS)位置對應的內部RAM地址.
//修改日期:2009.11.04
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdpos(void)                       //設置坐標點(XPOS,YPOS)內部RAM地址的子程序
{
   if(XPOS<64)
   {   lcdwc1(0xB8|((YPOS/8)&0x7));     //頁地址設置
       lcdwc1(0x40|XPOS);               //列地址設置
   }
   else if(XPOS<128)
   {   lcdwc2(0xB8|((YPOS/8)&0x7));     //頁地址設置
       lcdwc2(0x40|(XPOS&0x3F));        //列地址設置
   }
   else
   {   lcdwc3(0xB8|((YPOS/8)&0x7));     //頁地址設置
       lcdwc3(0x40|(XPOS&0x3F));        //列地址設置
   }
}
//-------------------------------------------------------------------------------
//子程序名稱:void lcdreset(void)
//功能:液晶顯示控制器初始化
//修改日期:2009.11.04
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdreset(void)                     //液晶顯示控制器初始化子程序
{
    lcdwc1(0xC0);                       //設置顯示初始行
    lcdwc2(0xC0);                       //設置顯示初始行
    lcdwc3(0xC0);                       //設置顯示初始行
    lcdwc1(0x3F);                       //開顯示
    lcdwc2(0x3F);                       //開顯示
    lcdwc3(0x3F);                       //開顯示
}
//-------------------------------------------------------------------------------
//以下lcdwc1,lcdwc2,lcdwc3,lcdwd,lcdrd為MCS51總線接口的KS0108B液晶顯示控制器的基本
//子程序,lcdwd1,lcdwd2,lcdwd3,lcdrd1,lcdrd2,lcdrd3,lcdwaitidle1,lcdwaitidle2,
//lcdwaitidle3為內部子程序.
//-------------------------------------------------------------------------------
//子程序名稱:unsigned char lcdrd(void).
//功能:從液晶顯示控制器中讀圖形數據.
//修改日期:2009.11.04
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
unsigned char lcdrd(void)
{unsigned char d;
    if(XPOS<64)
    {    d=lcdrd1();
         d=lcdrd1();
    }
    else if(XPOS<128)
    {    d=lcdrd2();
         d=lcdrd2();
    }
    else
    {    d=lcdrd3();
         d=lcdrd3();
    }
    return d;
}
//-------------------------------------------------------------------------------
//子程序名稱:void lcdwd(unsigned char d).
//功能:向液晶顯示控制器寫圖形數據.
//修改日期:2009.11.04
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdwd(unsigned char d)
{   if(XPOS<64)
        lcdwd1(d);
    else if(XPOS<128)
        lcdwd2(d);
    else
        lcdwd3(d);
}
//-------------------------------------------------------------------------------
//子程序名稱:void lcdwd1(unsigned char d).
//功能:向液晶顯示控制器1寫圖形數據.
//修改日期:2009.08.31
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdwd1(unsigned char d)
{   lcdwaitidle1();
    LCDD1WREG=d;
}
//-------------------------------------------------------------------------------
//子程序名稱:void lcdwd2(unsigned char d).
//功能:向液晶顯示控制器2寫圖形數據.
//修改日期:2009.08.31
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdwd2(unsigned char d)
{   lcdwaitidle2();
    LCDD2WREG=d;
}
//-------------------------------------------------------------------------------
//子程序名稱:void lcdwd3(unsigned char d).
//功能:向液晶顯示控制器3寫圖形數據.
//修改日期:2009.11.04
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdwd3(unsigned char d)
{   lcdwaitidle3();
    LCDD3WREG=d;
}
//-------------------------------------------------------------------------------
//子程序名稱:unsigned char lcdrd1(void).
//功能:從液晶顯示控制器1中讀圖形數據.
//修改日期:2009.08.31
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
unsigned char lcdrd1(void)              //讀圖形數據子程序
{
    lcdwaitidle1();                     //檢測液晶顯示控制器是否空閑
    return LCDD1RREG;
}
//-------------------------------------------------------------------------------
//子程序名稱:unsigned char lcdrd2(void).
//功能:從液晶顯示控制器2中讀圖形數據.
//修改日期:2009.08.31
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
unsigned char lcdrd2(void)              //讀圖形數據子程序
{
    lcdwaitidle2();                     //檢測液晶顯示控制器是否空閑
    return LCDD2RREG;
}
//-------------------------------------------------------------------------------
//子程序名稱:unsigned char lcdrd3(void).
//功能:從液晶顯示控制器3中讀圖形數據.
//修改日期:2009.11.04
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
unsigned char lcdrd3(void)              //讀圖形數據子程序
{
    lcdwaitidle3();                     //檢測液晶顯示控制器是否空閑
    return LCDD3RREG;
}
//-------------------------------------------------------------------------------
//子程序名稱:lcdwc1(unsigned char c).
//功能:向液晶顯示控制器1送指令.
//修改日期:2009.08.31
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdwc1(unsigned char c)            //向液晶顯示控制器1送指令
{   lcdwaitidle1();
    LCDC1WREG=c;
}
//-------------------------------------------------------------------------------
//子程序名稱:lcdwc2(unsigned char c).
//功能:向液晶顯示控制器2送指令.
//修改日期:2009.08.31
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdwc2(unsigned char c)            //向液晶顯示控制器2送指令
{   lcdwaitidle2();
    LCDC2WREG=c;
}
//-------------------------------------------------------------------------------
//子程序名稱:lcdwc3(unsigned char c).
//功能:向液晶顯示控制器3送指令.
//修改日期:2009.11.04
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdwc3(unsigned char c)            //向液晶顯示控制器3送指令
{   lcdwaitidle3();
    LCDC3WREG=c;
}
//-------------------------------------------------------------------------------
//子程序名稱:voidlcdwaitidle1(void).
//功能:忙檢測,在對液晶顯示控制器操作的每一條指令之前,需檢測液晶顯示器是否空閑.
//修改日期:2009.08.31
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdwaitidle1(void)                 //控制器1忙檢測子程序
{   unsigned char i;
    for(i=0;i<20;i++)                   //
        if( (LCDC1RREG&0x80) != 0x80 ) break;  //D7=0 空閑退出
}
//-------------------------------------------------------------------------------
//子程序名稱:voidlcdwaitidle2(void).
//功能:忙檢測,在對液晶顯示控制器操作的每一條指令之前,需檢測液晶顯示器是否空閑.
//修改日期:2009.08.31
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdwaitidle2(void)                 //控制器2忙檢測子程序
{   unsigned char i;
    for(i=0;i<20;i++)                   //
        if( (LCDC2RREG&0x80) != 0x80 ) break;  //D7=0 空閑退出
}
//-------------------------------------------------------------------------------
//子程序名稱:voidlcdwaitidle3(void).
//功能:忙檢測,在對液晶顯示控制器操作的每一條指令之前,需檢測液晶顯示器是否空閑.
//修改日期:2009.11.04
//修改人:chujianjun@sunman.cn,tanchao@sunman.cn
//-------------------------------------------------------------------------------
void lcdwaitidle3(void)                 //控制器3忙檢測子程序
{   unsigned char i;
    for(i=0;i<20;i++)                   //
        if( (LCDC3RREG&0x80) != 0x80 ) break;  //D7=0 空閑退出
}