lcd.c

SEED1335液晶驱动程序。相信很多厂家依然在用这款芯片

     p=Bmp;
     if(layer == 1)
        {init_high8 = SED1335LAY1_h; init_low8 = SED1335LAY1_l;}
   else if(layer == 2)
         {init_high8 = SED1335LAY2_h; init_low8 = SED1335LAY2_l;}
   else if(layer == 3)
         {init_high8 = SED1335LAY3_h; init_low8 = SED1335LAY3_l;}
   else{return;}
//set address	ly1
  LCD_WR_COM(CSRW);                        //CSRW 代码
  LCD_WR_DATA(init_low8);                       //设置参数光标指针低8位 
  LCD_WR_DATA(init_high8);                       //设置参数光标指针高8位 
//write data	
	LCD_WR_COM(MWRITE);  
	
	for(i=0;i<(40*240);i++)
	{
		
		LCD_WR_DATA(*p++);
			
	}	

}


//在区一的Py行(范围是1~30),Px列(范围是1~40),显示字母zimu
void plot_ZiMu(unsigned char Px,unsigned char Py,char ZiMu)
{
    int xdata offset,addr;
   unsigned char LB,HB;

   if(Px < 1 ||Px >40 ||Py <1 ||Py>30)   return;
   
   offset = (Py-1)*40 + Px-1;
   addr = ((unsigned int)SED1335LAY1_h << 8) + SED1335LAY1_l;
   addr = addr + offset;
   
   LB = addr & 0x00ff;
   HB = addr >> 8;

  //set address	ly1
  LCD_WR_COM(CSRW);                        //CSRW 代码
  LCD_WR_DATA(LB);                       //设置参数光标指针低8位 
  LCD_WR_DATA(HB);                       //设置参数光标指针高8位 
//write data	
	LCD_WR_COM(MWRITE); 
    LCD_WR_DATA(ZiMu); 
   
}


//在区一的Py行(范围是1~30),Px列(范围是1~40),显示字符串ZiChuan
void plot_ZiChuan(unsigned char Px,unsigned char Py,unsigned char *ZiChuan)
{
    int xdata offset,addr;
   unsigned char LB,HB;
   
   if(Px < 1 ||Px >40 ||Py <1 ||Py>30)   return;
   
   p = ZiChuan;
   offset = (Py-1)*40 + Px-1;
   addr = ((unsigned int)SED1335LAY1_h << 8) + SED1335LAY1_l;
   addr = addr + offset;
   
   LB = addr & 0x00ff;
   HB = addr >> 8;

  //set address	ly1
  LCD_WR_COM(CSRW);                        //CSRW 代码
  LCD_WR_DATA(LB);                       //设置参数光标指针低8位 
  LCD_WR_DATA(HB);                       //设置参数光标指针高8位 
//write data	
	LCD_WR_COM(MWRITE); 
for(;;)
  { 
    LCD_WR_DATA(*p++); 
    if(*p == '\0')  break;
   }
}
// --------->Px
// |
// |
// |  Py
// V 
//在区二的Py行(范围是1~240),Px列(范围是1~320)处显示点
//flag == 1 draw   point
//flag == 0 cancel point
void plot_point(unsigned int layer ,unsigned int Px,unsigned int Py,char flag)
{
    int xdata offset,addr;
   unsigned int xdata  init_high8,init_low8;
   unsigned char LB,HB,dw,temp;

  if(Px < 1 ||Px >320 ||Py <1 ||Py>240)   return;

   offset = (Py-1)*40 + (Px >> 3);//与写字母不同，相差1
  if(layer == 1)
        {init_high8 = SED1335LAY1_h; init_low8 = SED1335LAY1_l;}
   else if(layer == 2)
         {init_high8 = SED1335LAY2_h; init_low8 = SED1335LAY2_l;}
   else if(layer == 3)
         {init_high8 = SED1335LAY3_h; init_low8 = SED1335LAY3_l;}
   else{return;}

   addr = (init_high8  << 8) + init_low8;
   addr = addr + offset;
   
   dw = (Px & 0x0007);
   if(dw == 0x00)   addr=addr-1;

   LB = addr & 0x00ff;
   HB = addr >> 8;
// 读取当前显示数据
  //set address	ly1
  LCD_WR_COM(CSRW);                        //CSRW 代码
  LCD_WR_DATA(LB);                       //设置参数光标指针低8位 
  LCD_WR_DATA(HB);                       //设置参数光标指针高8位 

 LCD_WR_COM(MREAD);
 temp = LCD_READ_DATA()  ;
  
//write data 
  LCD_WR_COM(CSRW);                        //CSRW 代码
  LCD_WR_DATA(LB);                       //设置参数光标指针低8位 
  LCD_WR_DATA(HB);                       //设置参数光标指针高8位 
     
  LCD_WR_COM(MWRITE); 
      if(flag==0)  {LCD_WR_DATA( (~dw_point[dw] )& temp );}
      else
       { LCD_WR_DATA(( dw_point[dw] |temp) ); }// 写入合成数据

}

int min(int x1,int x2)
{   if(x1>x2)  return x2;
      else     return x1;
}
//draw line function
//函数格式为result  = K1(begin - m) +n

void plot_line(unsigned int layer,unsigned int Px1,unsigned int Py1,unsigned int Px2,unsigned int Py2)
{
   int xdata delta_x, delta_y,number, m,n;
   unsigned int    result_int;
   char flag;
   float   K1,result;
   int  Orgin ,i; 
  
   delta_x =abs( Px2-Px1);
   delta_y =abs( Py2-Py1);

   if(delta_x > delta_y) 
        { 
         number =delta_x;
         K1= ((float) Py2-Py1)/( (float)Px2-Px1);
         Orgin =min(Px1,Px2);
         m=Px1; n=Py1;
         flag=1;
        }
   else if( (delta_x==0) &&  (delta_y==0) ) 
        {return;}
   else   
        { 
         number =delta_y;
         K1= ( (float)Px2-Px1)/( (float)Py2-Py1);
         Orgin =min(Py1,Py2);
         m=Py1; n=Px1;
         flag=0;
         }

  
     for(i=0;i<number+1;i++)
          {
             result=K1*((Orgin+i) -m)+n;
             result_int = (unsigned int)result;
             if(  (result - result_int) >=0.5  )   result_int++;

             if(flag==1)
                { 
                   plot_point( layer,(unsigned int)(Orgin+i), result_int,1);
                 }
             else if(flag==0)  
                {  
                    plot_point( layer,result_int,(unsigned int)(Orgin+i), 1);
                 }

          }
}

void draw_ZuoBiaoZhou( unsigned int layer )
{  unsigned int xdata i;
   
plot_Chinese(layer,4,1,bmp_dian);
plot_Chinese(layer,6,1,bmp_ya);
plot_Chinese(layer,8,1,bmp_V);



   plot_line(layer,  20,20,    20,220);//纵轴
   plot_line(layer,  1,131,    300,131);//横轴

   plot_line(layer,  24,28,    20,20);
   plot_line(layer,  16,28,    20,20);

   plot_line(layer,  292,135,  300,131 );
   plot_line(layer,  292,127,  300,131 );

   for(i=1;i<=6;i++)
{
   plot_line(layer,17, (131-i*17),19,(131-i*17));
   plot_line(layer,17, (131+i*17),19,(131+i*17));
}

  
  plot_Number(layer,2,106,bmp_number[1]);
  plot_Number(layer,2,106-17,bmp_number[2]);
  plot_Number(layer,2,106-2*17,bmp_number[3]);
  plot_Number(layer,2,106-3*17,bmp_number[4]);
  plot_Number(layer,2,106-4*17,bmp_number[5]);
  plot_Number(layer,2,106-5*17,bmp_number[6]);

}

//display qne value like 1.2568,float kind.
void display_float(unsigned int layer,unsigned int Px,unsigned int Py,float s)
{     
   unsigned char m[5];
   m[0]=s;//将x的前三位放入m数数组中
   while(s>=1){s=s-1.0;}   
   s=s*10;   
   m[1]=s;
   while(s>=1){s=s-1.0;}  
   s=s*10;  
   m[2]=s;
   while(s>=1){s=s-1.0;} 
   s= s*10;   
   m[3]=s;
   while(s>=1){s=s-1.0;}  
   s=s*10;  
   m[4]=s;

  
   
  plot_Number(layer,Px,Py,bmp_number[m[0]]);
  plot_Number(layer,Px+1,Py,bmp_number[10]);
  plot_Number(layer,Px+2,Py,bmp_number[m[1]]);
  plot_Number(layer,Px+3,Py,bmp_number[m[2]]);
  plot_Number(layer,Px+4,Py,bmp_number[m[3]]);
  plot_Number(layer,Px+5,Py,bmp_number[m[4]]);
  plot_Chinese(layer,Px+6,Py,bmp_V);

}
//***************************************************//
//dispay one value such as 158 ,int kind.
//**************************************************//
void display_int(unsigned int layer,unsigned int Px,unsigned int Py,unsigned  int value)
{  
  unsigned char m[4];

  m[0]=value/1000;
  value=value%1000;

  m[1]=value/100;
  value=value%100;

  m[2]=value/10;
  value=value%10;

  m[3]=value;

  plot_Number(layer,Px,  Py,bmp_number[m[0]]);
  plot_Number(layer,Px+1,Py,bmp_number[m[1]]);
  plot_Number(layer,Px+2,Py,bmp_number[m[2]]);
  plot_Number(layer,Px+3,Py,bmp_number[m[3]]);
        
}