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Driver for 192x64 GLCD with KS0108B Controller

 
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sshahryiar



Joined: 05 May 2010
Posts: 92
Location: Dhaka, Bangladesh

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Driver for 192x64 GLCD with KS0108B Controller
PostPosted: Mon Aug 13, 2012 12:56 am     Reply with quote

Code:
                                                                           
#define LARGE_LCD   

#ifndef HDM64GS192             
#define HDM64GS192           
                             
#ifndef GLCD_WIDTH
#define GLCD_WIDTH   192
#endif

#ifndef GLCD_CS1                   
#define GLCD_CS1     PIN_B3   // Chip Selection 1
#endif                                           

#ifndef GLCD_CS2         
#define GLCD_CS2     PIN_B5   // Chip Selection 2
#endif

#ifndef GLCD_CS3       
#define GLCD_CS3     PIN_B6   // Chip Selection 3 
#endif

#ifndef GLCD_DI                             
#define GLCD_DI      PIN_B0   // Data or Instruction input
#endif

#ifndef GLCD_RW
#define GLCD_RW      PIN_B1   // Read/Write
#endif                                             

#ifndef GLCD_E
#define GLCD_E       PIN_B2   // Enable
#endif

#ifndef GLCD_RST
#define GLCD_RST     PIN_B4   // Reset
#endif                         

#define GLCD_LEFT    0
#define GLCD_MID     1
#define GLCD_RIGHT   2

#ifndef ON
#define ON           1
#endif

#ifndef OFF
#define OFF          0
#endif                                   

/////////////////////////////////////////////////////////////////////////
// Function Prototypes
/////////////////////////////////////////////////////////////////////////
void glcd_init(int1 mode);
void glcd_pixel(unsigned int8 x, unsigned int8 y, int1 color);
void glcd_fillScreen(int1 color);
void glcd_writeByte(int8 side, BYTE data);
BYTE glcd_readByte(int8 side);
void glcd_update();
/////////////////////////////////////////////////////////////////////////

#ifdef FAST_GLCD
struct
{
   unsigned int8 left[512];
   unsigned int8 right[512];
   unsigned int8 mid[512];
} displayData;
#endif

//=============================================================================
// Purpose:       Initialize the LCD.
//                Call before using any other LCD function.
// Inputs:        OFF - Turns the LCD off
//                ON  - Turns the LCD on
void glcd_init(int1 mode)
{
   // Initialze some pins
   output_high(GLCD_RST);
   output_low(GLCD_E);
   output_high(GLCD_CS1);       
   output_high(GLCD_CS2);
   output_high(GLCD_CS3);
                             
   output_low(GLCD_DI);                 // Set for instruction
   glcd_writeByte(GLCD_LEFT, 0xC0);    // Specify first RAM line at the top
   glcd_writeByte(GLCD_RIGHT, 0xC0);    //   of the screen
   glcd_writeByte(GLCD_MID, 0xC0);
   glcd_writeByte(GLCD_LEFT, 0x40);    // Set the column address to 0
   glcd_writeByte(GLCD_RIGHT, 0x40);
   glcd_writeByte(GLCD_MID, 0x40);
   glcd_writeByte(GLCD_LEFT, 0xB8);    // Set the page address to 0
   glcd_writeByte(GLCD_RIGHT, 0xB8);
   glcd_writeByte(GLCD_MID, 0xB8);
   
   if(mode == ON)
   {
      glcd_writeByte(GLCD_LEFT, 0x3F); // Turn the display on
      glcd_writeByte(GLCD_MID, 0x3F);
      glcd_writeByte(GLCD_RIGHT, 0x3F);
   }
   else
   {                     
      glcd_writeByte(GLCD_LEFT, 0x3E); // Turn the display off
      glcd_writeByte(GLCD_MID, 0x3E);
      glcd_writeByte(GLCD_RIGHT, 0x3E);
   }

   glcd_fillScreen(OFF);                // Clear the display

   #ifdef FAST_GLCD
   glcd_update();
   #endif
}
//==================================================================================

// Purpose:    Update the LCD with data from the display arrays
#ifdef FAST_GLCD
void glcd_update()
{
   unsigned int8 i, j;
   unsigned int8 *p1, *p2, *p3;

   p1 = displayData.left;
   p2 = displayData.right;
   p3 = displayData.mid;

   // Loop through the vertical pages
   for(i = 0; i < 8; ++i)
   {
      output_low(GLCD_DI);                      // Set for instruction
      glcd_writeByte(GLCD_LEFT, 0x40);          // Set horizontal address to 0
      glcd_writeByte(GLCD_RIGHT, 0x40);
      glcd_writeByte(GLCD_MID, 0x40);
      glcd_writeByte(GLCD_LEFT, i | 0xB8);      // Set page address
      glcd_writeByte(GLCD_RIGHT, i | 0xB8);
      glcd_writeByte(GLCD_MID, i | 0xB8);                 
      output_high(GLCD_DI);                     // Set for data

      // Loop through the horizontal sections
      for(j = 0; j < 64; ++j)
      {
         glcd_writeByte(GLCD_LEFT, *p1++);      // Turn pixels on or off
         glcd_writeByte(GLCD_RIGHT, *p2++);     // Turn pixels on or off
         glcd_writeByte(GLCD_MID, *p3++);     // Turn pixels on or off
      }
   }
}
#endif

//===================================================================================
// Purpose:    Turn a pixel on a graphic LCD on or off
// Inputs:     1) x - the x coordinate of the pixel
//             2) y - the y coordinate of the pixel
//             3) color - ON or OFF
void glcd_pixel(unsigned int8 x, unsigned int8 y, int1 color)
#ifdef FAST_GLCD
{
   unsigned int8* p;
   unsigned int16 temp;
   temp =  y/8;
   temp *= 64;
   temp += x;
                 
   if((x>63)&&(x<128))
   {
      p = displayData.mid + temp - 64;
   }
   else if(x>127)
   {
      p = displayData.right + temp-128;
   }
   else if((x>=0)&&(x<4))                                                           
   {
      p = displayData.left+temp;

   if(color)
   {
      bit_set(*p, y%8);
   }
   else
   {
      bit_clear(*p, y%8);
   }
}
#else
{
   BYTE data;
   int8 side = GLCD_LEFT;  // Stores which chip to use on the LCD

   if((x>63)&&(x<128))              // Check for first or second display area
   {
      x -= 64;
      side = GLCD_MID;
   }
   else if ((x>127)&&(x<192))
   {                             
      x -=128;
      side=GLCD_RIGHT;
   }                         
   else
   {
      side=GLCD_LEFT;
   }                       

   output_low(GLCD_DI);                         // Set for instruction
   bit_clear(x,7);                              // Clear the MSB. Part of an instruction code
   bit_set(x,6);                                // Set bit 6. Also part of an instruction code
   glcd_writeByte(side, x);                     // Set the horizontal address
   glcd_writeByte(side, (y/8 & 0xBF) | 0xB8);   // Set the vertical page address
   output_high(GLCD_DI);                        // Set for data
   glcd_readByte(side);                         // Need two reads to get data
   data=glcd_readByte(side);                  //  at new address
                     
   if(color == ON)
      bit_set(data, y%8);        // Turn the pixel on
   else                          // or
      bit_clear(data, y%8);      // turn the pixel off

   output_low(GLCD_DI);          // Set for instruction
   glcd_writeByte(side, x);      // Set the horizontal address
   output_high(GLCD_DI);         // Set for data                                                             
   glcd_writeByte(side, data);   // Write the pixel data
}         
#endif

//=============================================================================================
// Purpose:    Fill the LCD screen with the passed in color
// Inputs:     ON  - turn all the pixels on
//             OFF - turn all the pixels off
void glcd_fillScreen(int1 color)
#ifdef FAST_GLCD
{
   unsigned int8  data;
   unsigned int8  *p1, *p2, *p3;
   unsigned int16 i;
                               
   p1 = displayData.left;                       
   p2 = displayData.right;
   p3 = displayData.mid;
   data = 0xFF * color;

   for(i=0; i<512; ++i)
   {
      *p1++ = data;
      *p2++ = data;
      *p3++ = data;
   }
}
#else
{
   unsigned int8 i, j;

   // Loop through the vertical pages
   for(i = 0; i < 8; ++i)
   {
      output_low(GLCD_DI);                      // Set for instruction
      glcd_writeByte(GLCD_LEFT, 0b01000000);    // Set horizontal address to 0
      glcd_writeByte(GLCD_RIGHT, 0b01000000);
      glcd_writeByte(GLCD_MID, 0b01000000);
      glcd_writeByte(GLCD_LEFT, i | 0b10111000);// Set page address
      glcd_writeByte(GLCD_RIGHT, i | 0b10111000);
      glcd_writeByte(GLCD_MID, i | 0b10111000);
      output_high(GLCD_DI);                     // Set for data

      // Loop through the horizontal sections
      for(j = 0; j < 64; ++j)
      {
         glcd_writeByte(GLCD_LEFT, 0xFF*color);  // Turn pixels on or off
         glcd_writeByte(GLCD_MID, 0xFF*color); // Turn pixels on or off   
         glcd_writeByte(GLCD_RIGHT, 0xFF*color); // Turn pixels on or off
      }
   }
}
#endif
                                 
//==================================================================================
// Purpose:    Write a byte of data to the specified chip
// Inputs:     1) chipSelect - which chip to write the data to
//             2) data - the byte of data to write
void glcd_writeByte(int8 side, BYTE data)
{
   set_tris_d(0x00);
   
   output_low(GLCD_RW);       // Set for writing
                                     
   if(side==0)             // Choose which side to write to
   {   
      output_low(GLCD_CS1);
      output_high(GLCD_CS2);
      output_high(GLCD_CS3); 
   }
   else if(side==1)             
   {   
      output_low(GLCD_CS2);       
      output_high(GLCD_CS1);
      output_high(GLCD_CS3); 
   }
   else                                                                                                                                         
   {   
      output_low(GLCD_CS3);
      output_high(GLCD_CS2);
      output_high(GLCD_CS1); 
   }                   
    delay_us(1);             


   output_d(data);            // Put the data on the port
   delay_us(1);
   output_high(GLCD_E);       // Pulse the enable pin
   delay_us(5);                                                           
   output_low(GLCD_E);

   output_high(GLCD_CS1);      // Reset the chip select lines
   output_high(GLCD_CS2); 
   output_high(GLCD_CS3); 
}
                                                 
//===============================================================================
// Purpose:    Reads a byte of data from the specified chip
// Ouputs:     A byte of data read from the chip
BYTE glcd_readByte(int8 side)
{
   BYTE data;                 // Stores the data read from the LCD

   set_tris_d(0xFF);          // Set port d to input
   output_high(GLCD_RW);      // Set for reading

   if(side==0)                   // Choose which side to write to
   {   
      output_low(GLCD_CS1);
      output_high(GLCD_CS2);
      output_high(GLCD_CS3); 
   } 
   else if(side==1)
   {   
      output_low(GLCD_CS2);
      output_high(GLCD_CS1);
      output_high(GLCD_CS3); 
   } 
   else
   {   
      output_low(GLCD_CS3);
      output_high(GLCD_CS2);
      output_high(GLCD_CS1); 
   } 
                                                                           
   delay_us(1);
   output_high(GLCD_E);       // Pulse the enable pin
   delay_us(4);
   data = input_d();          // Get the data from the display's output register
   output_low(GLCD_E);

   output_high(GLCD_CS1);      // Reset the chip select lines
   output_high(GLCD_CS2);
   output_high(GLCD_CS3);
   return data;               // Return the read data
}                                                                     

#endif




Please note that this driver works with this GLCD below or similar:
http://www.vishay.com/docs/37364/37364.pdf
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SShahryiar
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