lcd.c

LCD320*240驱动程序

   int i;
   
   GotoXY(x,y);
   
   LCDWriteCmd(MWRITE);       // LCD WRITE MEMORY
   //while(*ptr != 0x00)
   //LCDWriteData(*ptr++);
   i=0;
   while(1)
   {
      if(i<16)
      {
         LCDWriteData(*ptr++);
         i++;
      }
      else
         break;
   }	  
}
/**********************************************************
Name:  void Cursor(unsigned char)
Description:   0-> Cursor off
               1-> Cursor on
Input:         ON/OFF
Output:        none
Misc:       
**********************************************************/
void Cursor(unsigned char cursor)
{
   LCDWriteCmd(DISP_ON);         // DISPLAY ON COMMAND
   if (cursor == 0)
      LCDWriteData(0x14);
   else
      LCDWriteData(0x16);
}

/**********************************************************
Name:  void GClrSCR(void)
Description:   Clear Graphic Screen layer 2
Input:         none
Output:        none
Misc:       
**********************************************************/
void GClrSCR(void)
{
   int i,j;

   LCDWriteCmd(CSRW);         // CURSOR WRITE COMMAND
   LCDWriteData(0x00);        // Cursor position low byte
   LCDWriteData(0x10);        // Cursor position high byte

   LCDWriteCmd(MWRITE);         // LCD WRITE MEMORY COMMAND
   DATAOUT = 0x00;
   A0_L;                      // A0 -> 0
   j = ((GUI_LCM_XMAX/8)*GUI_LCM_YMAX);
   for (i=0;i<j;i++)
   {
      WR_L;                   // WR -> 0 & WR -> 1
      WDR();
      WR_H;
   }
   LCDWriteCmd(CSRW);         // CURSOR WRITE COMMAND
   LCDWriteData(0x00);        // Cursor position low byte
   LCDWriteData(0x10);        // Cursor position high byte
}

/**********************************************************
Name:  void GClrPART(void)
Description:   Clear Graphic Screen layer 2
Input:         none
Output:        none
Misc:       
**********************************************************/
void GClrPART(int x1, int y1, int x2, int y2)
{
    int startAddr=0x0000;
	unsigned char LSBa, MSBa,len,wid;
	startAddr+=40*y1+x1/8;
		
    for(wid=0;wid<(y2-y1);wid++)
	{        	  
 	  LSBa=startAddr&0x00FF;
	  MSBa=(startAddr>>8)+0x10;   
	  LCDWriteCmd(CSRW);
	  LCDWriteData(LSBa);           
	  LCDWriteData(MSBa);
	  LCDWriteCmd(CSRDIR1);
	  LCDWriteCmd(MWRITE);
	  for(len=0;len<(x2-x1)/8;len++)
	  {
		LCDWriteData(0x00);	
	  }
	  startAddr+=40;
    }
}

/**********************************************************
Name:  void GFullPART(void)
Description:   Clear Graphic Screen layer 2
Input:         none
Output:        none
Misc:       
**********************************************************/
void GFullPART(int x1, int y1, int x2, int y2)
{
    int startAddr=0x0000;
	unsigned char LSBa, MSBa,len,wid;
	startAddr+=40*y1+x1/8;
		
    for(wid=0;wid<(y2-y1);wid++)
	{        	  
 	  LSBa=startAddr&0x00FF;
	  MSBa=(startAddr>>8)+0x10;   
	  LCDWriteCmd(CSRW);
	  LCDWriteData(LSBa);           
	  LCDWriteData(MSBa);
	  LCDWriteCmd(CSRDIR1);
	  LCDWriteCmd(MWRITE);
	  for(len=0;len<(x2-x1)/8;len++)
	  {
		LCDWriteData(0xFF);	
	  }
	  startAddr+=40;
    }
}

/**********************************************************
Name:  void GPix(int x, int y, unsigned char stat)
Description:   Set of Clear a pixel
Input:         none
Output:        none
Misc:       
**********************************************************/
void GPix(int x, int y, unsigned char stat)
{
   unsigned int Address;
   unsigned char Offset;
   unsigned char low;
   unsigned char high;
   unsigned char byte;

   x--;
   y--;
   Address = (y * (GUI_LCM_XMAX/8)) + (x / 8);
   Offset = x - ((x / 8) * 8);

   low = (unsigned char) (Address & 0x00ff);
   high = (unsigned char) (((Address & 0xff00) >> 8) + 0x10);

   LCDWriteCmd(CSRW);         // CURSOR WRITE COMMAND
   LCDWriteData(low);         // Cursor position low byte
   LCDWriteData(high);        // Cursor position high byte

   LCDWriteCmd(MREAD);         // READ LCD MEMORY COMMAND
   byte = LCDReadData();      // Read data at position

   if (stat != 0)
      byte |= (0x80 >> Offset);
   else
      byte &= (~(0x80 >> Offset));

   LCDWriteCmd(CSRW);         // CURSOR WRITE COMMAND
   LCDWriteData(low);         // Cursor position low byte
   LCDWriteData(high);        // Cursor position high byte

   LCDWriteCmd(MWRITE);       // LCD WRITE MEMORY COMMAND
   LCDWriteData(byte);        // Write byte
}

/**********************************************************
Name:  void GBox(int x1, int y1, int x2, int y2)
Description:   draw a box
Input:         none
Output:        none
Misc:       
**********************************************************/
void GBox(int x1, int y1, int x2, int y2,int stat)
{
   int i;

   for (i=x1;i<=x2;i++)
      GPix(i,y1,stat);        // Top line
   for (i=x1;i<=x2;i++)
      GPix(i,y2,stat);        // Bottom line
   for (i=y1;i<=y2;i++)
      GPix(x1,i,stat);        // Left side
   for (i=y1;i<=y2;i++)
      GPix(x2,i,stat);        // Right side
}

/**********************************************************
Name:  void TextBox(int x, int y, int length,int stat)
Description:   
Input:         none
Output:        none
Misc:       
**********************************************************/
void TextBox(int x, int y, int length,int stat)
{
   GBox(((x-1)*8),((y-1)*8),(((length*8)+((x-1)*8))-2),(y*12),stat);
}

/**********************************************************
Name:  void GLine(int x1, int y1, int x2, int y2)
Description:   draw a line
Input:         none
Output:        none
Misc:       
**********************************************************/
void GLine(int x1, int y1, int x2, int y2)
{
   int dx,dy,stepx,stepy,fraction;

   dy = y2 - y1;
   dx = x2 - x1;

   if (dy < 0)
   {
      dy = -dy;
      stepy = -1;
   }
   else
   {
      stepy = 1;
   }

   if (dx < 0)
   {
      dx = -dx;
      stepx = -1;
   }
   else
   {
      stepx = 1;
   }

   dy <<= 1;
   dx <<= 1;

   GPix(x1,y1,1);

   if (dx > dy)
   {
      fraction = dy - (dx >> 1);
      while (x1 != x2)
      {
         if (fraction >= 0)
         {
            y1 += stepy;
            fraction -= dx;
         }
         x1 += stepx;
         fraction += dy;
         GPix(x1,y1,1);
      }
   }
   else
   {
      fraction = dx - (dy >> 1);
      while (y1 != y2)
      {
         if (fraction >= 0)
         {
            x1 += stepx;
            fraction -= dy;
         }
         y1 += stepy;
         fraction += dx;
         GPix(x1,y1,1);
      }
   }
}