Thursday, 6 December 2018

GLCD (Graphical Liquid Crystal Display) interfacing with LPC2148

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GLCD signals:



  • It has 8 data lines.
  •  RS: It is register select , if  RS='1' then Data register , if RS=0 then command register.
  • E:Latches information presented to its.
  • CS1 & CS2: Chip select signal.
  • Reset: LCD reset signal.

 

Structure of GLCD:

Structure of GLCD

GLCD initialization:

  

LCD initialization
  • CS1=1 & CS2=1 (Activate both half display)  
  • RS=0 & RW=0 (Select command mode) 
  • E=1 
  • Delay 
  • E=0 

Page Selection:

 

In GLCD there are total 8 pages available, which can be selected using X address. 2^3=8.

 

Page selection

 

000 = Page 0 (Address = 0xB8)
001 = Page 1 (Address = 0xB9)
010 = Page 2 (Address = 0xBA)
011 = Page 3 (Address = 0xBB)
100 = Page 4 (Address = 0xBC)
101 = Page 5 (Address = 0xBD)
110 = Page 6 (Address = 0xBE)
111 = Page 7 (Address = 0xBF)

 

    column selection:

     

    Total  128 column is available in GLCD which is divided into two parts.
    .
    0 to 63 column is selected using Y address , i.e D0 to D5 and remaining bits remain as it is.

    Column selection

     

     If CS1=1 & CS2=0 then 0 to 63 column is selected and CS1=0 & CS2=1 then 64 to 127 column is selected.

    Y6 - Y1 : Column Selection
    000000 = Column 0 (Address = 0x40)
    000001 = Column 1 (Address = 0x41)
    000010 = Column 2 (Address = 0x42)
    ...

    ...
    111111 = Column 63 (Address = 0x7F)

     


    Circuit diagram:

    1) Line display:

    GLCD INTERFACING WITH LPC2148

     

    2) Image display:

    GLCD INTERFACING WITH LPC2148


    Algorithm:

    1. Start
    2. Initially define hardware of interfacing Diagram
    3. Initialize GLCD by selecting functions of LPC2148 pins as GPIO, Set direction of pins as an output pins, Send Commands to GLCD to Turn on both halves of GLCD
    4. Call function glcd_clr(). If column no. is <64 Turn on left half of display using CS1=1 , CS2=0 else turn on Right half display using CS1=0, CS2=1.Send Commands to GLCD through command function
    5. GLCD Command function:- Clear command value available on data pins first ,shift the command value by 16 bits to left side to get available on P0.16 to P0.23 , Make RS pin=0, RW pin=0, High to low pulse on Enable pin
    6. GLCD Data function :- Clear data available on data pins first ,shift the data by 16 bits to left side to get available on P0.16 to P0.23 , Make RS pin=1, RW pin=0, High to low pulse on Enable pin
    7. Pass the array of of hex value x[ ] to data function
    8. End

     

    Code:


    1)Interfacing GLCD with LPC2148 to display line on screen


    /**********************************************
    Platform:  LPC2148 Development Board.
    College: PICT
    
    Hardware Setup:-
    LCD data pin :-P0.16-P0.23 
     RS - P1.16
     RW - P1.17
     EN - P1.18
     CS1 - P1.19
     CS2 - P1.20
     RST - P1.21   
    ************************************************/
    # include<lpc214x.h>
    # define GLCD_CS1_SET IOSET1= 1<<19
    # define GLCD_CS2_SET IOSET1= 1<<20
    # define GLCD_RST_SET IOSET1= 1<<21
    # define GLCD_CS1_CLR IOCLR1= 1<<19
    # define GLCD_CS2_CLR IOCLR1= 1<<20
    # define GLCD_RST_CLR IOCLR1= 1<<21  
    # define RS_CMD  IOCLR1= 1<<16
    # define RS_DATA IOSET1= 1<<16
    # define write   IOCLR1= 1<<17
    # define en_high   IOSET1= 1<<18
    # define en_low    IOCLR1= 1<<18
    
    void ms_delay(unsigned char t)  //delay function definition
    {
    int i, j;
    for(i=0;i<t;i++)
    {
    for(j=0;j<8002;j++);
    }
    }
    
    void GLCD_CMD( unsigned char cmd)  // command function definition RS=0,RW=0,E= 1 to 0
    {
    
    RS_CMD;
    write;
    IOCLR0=0x00FF0000;
    IOSET0=(cmd<<16);
    en_high;
    ms_delay(1);
    en_low;
    
    }
    
    void GLCD_INIT()
    {
    GLCD_RST_SET;      // RST is active low signal
    GLCD_CS1_SET;
    GLCD_CS2_SET;
    GLCD_CMD(0x3F);    // GLCD display on
    GLCD_CMD(0xB8);    // Page 0 address initialization
    GLCD_CMD(0x40);    // Column 0 address initialization
    }
     
    
    void PAGE_COL_SEL( unsigned char pag,unsigned char col)
    {
    if(col<64)
    {
    GLCD_CS1_SET;           // Select First half part display
    GLCD_CS2_CLR;
    GLCD_CMD(0x40|col);    // Generate column address
     GLCD_CMD(0xB8|pag);   // Generate page address
    }
    else
    {
    
    GLCD_CS1_CLR;           // Select Second half part display
    GLCD_CS2_SET;
    GLCD_CMD(0x40|(col-64));
     GLCD_CMD(0xB8|pag);
    }
    }
    
    void GLCD_DATA( unsigned char data)  // Data function definition RS=1, RW=0, E=1 to 0
    {
    IOCLR0=0x00ff0000;
    RS_DATA;
    write;
    IOSET0=data<<16;  
    en_high;
    ms_delay(1);
    en_low;
      }
     void glcd_clr()
    
     {  int i,j;
       for (i=0;i<128;i++)     // loop for column selection
        {
       for (j=0;j<8;j++)       // loop for page selection
       {
           PAGE_COL_SEL(j,i);   // pass page and column value
    
        GLCD_DATA(0x00);
        }
        }
     }
    
     
    
    int main()
    {
    int i,j;
    PINSEL1= 0x00000000;
    PINSEL2= 0x00000000;
    IODIR0= 0xFF<<16;      // Set pin P0.16 to P0.23 as a output
    IODIR1= 0XFF<<16;      // Set pin P1.16 to P1.23 as a output 
    GLCD_INIT();
    glcd_clr();
    for (j=0;j<2;j++)
     {
      for(i=0;i<128;i++)
      {
           PAGE_COL_SEL(j,i);
         {
        GLCD_DATA(0x0f);
        
      } 
          }
     
     
     }
    }
     

    1*)Interfacing GLCD with LPC2148 to display line on screen


    /*********************************************************
    Hardware Setup:-
     LCD data pin :-P0.16-P0.23 
     RS - P1.16
     RW - P1.17
     EN - P1.18
     CS1 - P1.19
     CS2 - P1.20
     RST - P1.21
     
    ********************************************************************************/
    
    //Include Controller specific header file
    #include <lpc214x.h> 
    #include "image.h"
    
    
    //Define Macro Functions
    #define GLCD_CS1_SET()  IOSET1=1<<19;
    #define GLCD_CS2_SET() IOSET1=1<<20;
    #define GLCD_RST_SET() IOSET1=1<<21;
    #define GLCD_CS1_CLR()  IOCLR1=1<<19;
    #define GLCD_CS2_CLR() IOCLR1=1<<20;
    #define GLCD_RST_CLR() IOCLR1=1<<21;
    unsigned char c=0;
    
    //Function to generate software delay
    //Calibrated to 1ms
    void  delay_ms(unsigned int time)    
    {  
     unsigned int  i, j;
     for (j=0; j<time; j++)
      for(i=0; i<8002; i++);
    }
    
    void GLCD_command(unsigned char command)
    {
     IOCLR0 = 0xFF<<16; // Clear LCD Data lines
     IOCLR1=1<<16;  // RS=0 for command
     IOCLR1=1<<17;  // RW=0 for write
     IOSET0=command<<16; // put command on data line
     IOSET1=(1<<18);  // en=1 
     delay_ms(1) ;  // delay
     IOCLR1=(1<<18);   // en=0
    }
    
    void GLCD_data(unsigned char data)
    {
     IOCLR0 = 0xFF<<16; // Clear LCD Data lines
     IOSET1=1<<16;   // RS=1 for data
     IOCLR1=1<<17;   // RW=0 for write
     IOSET0= data<<16;  // put command on data line
     IOSET1=(1<<18);  //en=1 
     delay_ms(1) ;    //delay
     IOCLR1=(1<<18);  //en=0
     }
    
    
    void GLCD_init()
    {
     GLCD_RST_SET();  //Set the Reset Pin
     GLCD_CS1_SET();  //Select Chip1
     GLCD_CS2_SET();  //Select Chip2
     GLCD_command(0x3F); //GLCD_Display_ON_Command
     delay_ms(10) ;  //Delay
     GLCD_command(0xB8);  //Set Page Address to 0
     delay_ms(10) ;  //Delay
     GLCD_command(0x40);  //Set Coloumn Address to 0
     delay_ms(10) ;  //Delay
    }
    
    void GLCD_setpage(unsigned char page)
    {
     GLCD_CS1_SET();   //Select Chip1
     GLCD_CS2_SET();   //Select Chip2
     GLCD_command(0xB8|page); //GLCD_pageset_Command
     delay_ms(10) ;   //Delay
    }
    
    void GLCD_setcolumn(unsigned char column)
    {
     if(column<64)
     {
      c=column;
      GLCD_CS1_SET();   //Select Chip1
      GLCD_CS2_CLR();   //Select Chip2
      GLCD_command(0x40|column); //GLCD_columnset_Command
      delay_ms(10);
     }
     else
     {  
      c=column;
      GLCD_CS1_CLR();   //Select Chip1
      GLCD_CS2_SET();   //Select Chip2
      GLCD_command(0x40|column-64); 
      delay_ms(10);
     }
    }
     
    
    
    void GLCD_Clear_Display()
    {
     int i,j;
     for(i=0;i<8;i++)
     {
      GLCD_setpage(i);
      GLCD_setcolumn(0);
      for(j=0;j<64;j++) //Send data to first half
       GLCD_data(0x01);
        
      GLCD_setcolumn(64);
      for(j=0;j<64;j++) //Send data to second half
       GLCD_data(0x01);
     }
    }
    
    int main(void)
    {
    
    
     //PINSEL1 = 0x00;     //Configure PORT0 as GPIO
     //PINSEL2 = 0X00;     //Configure PORT1 as GPIO
     IODIR1= 0xFF<<16;     //Configure P1.23 - P1.16 as output
     IODIR0= 0xFF<<16;     //Configure P0.23 - P0.16 as output
     GLCD_init();       //Initialize GLCD 128x64
     GLCD_Clear_Display();
        delay_ms(500);
    
     while(1);
    }




    3)Interfacing GLCD with LPC2148 to display image on screen
     

     
    /**************************************************************************************************
    Expt. 3b.: Interfacing GLCD to LPC2148 to display image on screen
    Platform:  LPC2148 Development Board.
    College: PICT
    Hardware Setup:-
     LCD data pin :-P0.16-P0.23 
     RS - P1.16
     RW - P1.17
     EN - P1.18
     CS1 - P1.19
     CS2 - P1.20
     RST - P1.21         
    ********************************************************************************/ 
    /**************************************************************************************************
    
    
    # include<lpc214x.h>
    # define GLCD_CS1_SET IOSET1= 1<<19
    # define GLCD_CS2_SET IOSET1= 1<<20
    # define GLCD_RST_SET IOSET1= 1<<21
    # define GLCD_CS1_CLR IOCLR1= 1<<19
    # define GLCD_CS2_CLR IOCLR1= 1<<20
    # define GLCD_RST_CLR IOCLR1= 1<<21  
    # define RS_CMD  IOCLR1= 1<<16
    # define RS_DATA IOSET1= 1<<16
    # define write   IOCLR1= 1<<17
    # define en_high   IOSET1= 1<<18
    # define en_low    IOCLR1= 1<<18
    
    void ms_delay(unsigned char t)
    {
    int i, j;
    for(i=0;i<t;i++)
    {
    for(j=0;j<8002;j++);
    }
    }
    
    
    
    void GLCD_CMD( unsigned char cmd)
    {
    
    RS_CMD;
    write;
    IOCLR0=0x00FF0000;
    IOSET0=(cmd<<16);
    en_high;
    ms_delay(1);
    en_low;
    
    }
    
    void GLCD_INIT()
    {
    GLCD_RST_SET;
    GLCD_CS1_SET;
    GLCD_CS2_SET;
    GLCD_CMD(0x3F);
    GLCD_CMD(0xB8);
    GLCD_CMD(0x40);
    }
     
    
    
    void PAGE_COL_SEL( unsigned char pag,unsigned char col)
    {
    if(col<64)
    {
    GLCD_CS1_SET;
    GLCD_CS2_CLR;
    GLCD_CMD(0x40|col);
    GLCD_CMD(0xB8|pag);
    }
    else
    {
    
    GLCD_CS1_CLR;
    GLCD_CS2_SET;
    GLCD_CMD(0x40|(col-64));
    GLCD_CMD(0xB8|pag);
    }
    }
    
    void GLCD_DATA( unsigned char data)
    {
    
    RS_DATA;
    write;
    IOCLR0=0x00ff0000;
    IOSET0=data<<16;  
    en_high;
    ms_delay(1);
    en_low;
     }
    
    void glcd_clr()
    
          { int i,j;
       for (i=0;i<8;i++)
        {
       for (j=0;j<127;j++)
       {
           PAGE_COL_SEL(i,j);
    
        GLCD_DATA(0x00);
       }
      }
     }
    
    int main()
    {
    int i,j,k=0;
    unsigned char x[]={ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xE0,0xF0,0xFC,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFC,0xF0,0xC0,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
     0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFC,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
     0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x2F,0xFF,0xFF,0xDF,0xFF,0xF7,0xFB,0xFB,0xFB,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x6F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x78,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
     0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x07,0x0F,0x3D,0xD1,0xC3,0xE7,0xEF,0xFF,0xFF,0xFF,0xFF,0xFF,0x6F,0x73,0x78,0xFF,0xF7,0xFF,0x7F,0x3F,0xBE,0xBA,0x3F,0x7B,0xDB,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x78,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0xF0,0xF0,0xE0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,0xF0,
     0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x0F,0x1F,0x3F,0x67,0x21,0x0F,0x3E,0x3F,0x3F,0x3F,0x1F,0x3F,0x1F,0x0F,0x0F,0x0F,0x0F,0x07,0x03,0x00,0x00,0x83,0x0F,0x07,0x1F,0x07,0x00,0x00,0x00,0x70,0x98,0x18,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0x77,0xFF,0x77,0x3F,0xFF,0xBF,0x7F,0xBF,0x3F,0xFF,0xBF,0xFF,0x5F,0xFF,0xFF,0x77,0xCF,0xBF,0xFB,
     0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x00,0x00,0x00,0x18,0x3C,0x7E,0xFC,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0x38,0x1C,0x0C,0x06,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0xC0,0xE0,0xF8,0xFE,0xFF,0xFF,0xFE,0xFC,0xF8,0xF8,0xF0,0xE0,0xE0,0xE0,0xC0,0xC0,0xDC,0xD8,0xD0,0xD0,0xDC,0xBC,0xBC,0xBC,0xAC,0xEC,0x7C,0x3C,0x7C,0x7C,0xFC,0xFC,0xFC,0xF8,0xFC,0xFF,0xFF,0xF9,0xFF,0xFF,0xF3,0xEF,0xDD,0xE3,0xBE,0xFB,0xE6,0xFD,0xF7,0x7F,0xFB,0x7E,0x5E,0xFF,0xBD,0xFF,0x3D,0xFF,0xFF,
     0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0xC0,0xC0,0xE0,0xE0,0xF0,0xF0,0xF8,0xF8,0xF8,0xFC,0xFC,0xFE,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFC,0xF8,0xF0,0x30,0x07,0x0F,0x1F,0x3F,0x7F,0xFF,0x7F,0x7F,0x3F,0x00,0x00,0x00,0x00,0x00,0x00,0x04,0xC0,0xF8,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFE,0xFE,0xFD,0xFD,0xFB,0xF7,0xDF,0x7D,0xE7,0xDF,0xB3,0xA7,0xF7,0xFC,0xE7,0xDB,0xEE,0xFB,0xFE,0xF9,0xFD,0xFD,0xF6,0xFD,0xFE,0xFF,0xFC,0xFF,
     0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0xF8,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFC,0x07,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};     
    
    
    PINSEL1= 0x00000000;
    PINSEL2= 0x00000000;
    IODIR1= 0X00FF0000;
    IODIR0= 0X00FF0000;
    GLCD_INIT();
    glcd_clr();
     
       for (i=0;i<8;i++)
          {
            for(j=0;j<128;j++)
             {
                PAGE_COL_SEL(i,j);
         
                {
                   GLCD_DATA(x[k]);
                    k=k+1;
                } 
             }
      
    
    
          }
    }
    
    
    







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