Winstar GLCD display

[hemnath]

Hi, I'm interfacing GLCD with PIC 18LF2520, Oscillator type: Internal 1Mhz, CCS c compiler, GLCD: Winstar WG12232A-YYH

I having difficult in initializing the Graphic lcd. It does not have Enable pin.

Does anyone have sample code?

Thanks in advance

 

[hemnath]

Sample code: This code is not working. What could be the problem? any help will get appreciated

#include "18F2520.h"
#fuses INTRC_IO
#use delay(clock = 1000000)

#define A0	PIN_B3
#define CS1	PIN_B4
#define CS2	PIN_B5

#define   page1      0xb8
#define   page2      0xb9
#define   page3      0xba

void Write_command(unsigned int command);
void Write_data(unsigned int datap);
void write_address(unsigned int page, unsigned int segment);
void full_on();

void main()
{
	output_high(CS1);
	output_high(CS2);
	Write_command(0xe2);   //software Reset
	Write_command(0xa0);   //Select ADC = 0
	Write_command(0xa4);   //Static  Drive OFF
	Write_command(0xa9);   //Select Duty = 1 /32
	Write_command(0xc0);   //Set Start Line 0(C0H)~31(DFH)
	Write_command(0xb8);   //Set Page Address 0(B8H)~3(BBH)
	Write_command(0x00);   //Set segment Address 0(00H)~(4FH)
	Write_command(0xaf);   //Set Display ON

	while(1)
	{	
		full_on();
	}
}

void Write_command(unsigned int command)
{
	output_low(A0);                                //  A0 = 0 is write command
	output_a(command);

	output_low(CS1);
	output_high(CS1);

	output_low(CS2);
	output_high(CS2);
}

void Write_data(unsigned int datap)
{
	output_high(A0);                                //  A0 = 1 is write data
	output_a(datap);

	output_low(CS1);
	output_high(CS1);

	output_low(CS2);
	output_high(CS2);
}

void write_address(unsigned int page, unsigned int segment)
{
	output_high(CS1);
	output_high(CS2);
	Write_command(page);   //Set Page Address 0(B8H)~3(BBH)
	Write_command(segment);   //Set segment Address 0(00H)~(4FH)
}

void full_on()
{
	unsigned int x,y;
	write_address(page1,0x00);
	for(y=0;y<4;y++)
	{
		write_address(page1+y,0x00);
		for(x=0;x<61;x++)
		{
			output_low(CS1);
			output_high(CS2);
			Write_data(0xff);
		}
		for(x=0;x<61;x++)
		{
			output_high(CS1);
			output_low(CS2);
			Write_data(0xff);
		}
	}
}

 

[jayanth.devarayanadurga]

CE1 and CE2 are the Enable pins.

 

[hemnath]

If possible, can you check my sample program. It is not working. does my glcd_cmd and glcd_data functions are correct??

- - - Updated - - -

Thanks for replying.
If CS1 and CS2 are enable pins. Do i have to do high to low transition to send the data?

 

[hemnath]

Finally i got my lcd working. The problem was with the contrast pins.

I have displayed the character size of 8 x 8. But i want to display a character of 10 x 15. How can i do that? Please help. Is there any library?

#include "18F2520.h"
#fuses INTRC_IO                 // Internal oscillator   
#use delay(clock = 1000000)      // 1Mhz clock

// PIN Definitions
#define A0       PIN_B3
#define CS1      PIN_B4
#define CS2      PIN_B5
#define R_W      PIN_C0
#define RST      PIN_C1

void GLCD_INIT();
void glcd_cmd(unsigned char c);
void glcd_data(unsigned char z);

const unsigned char data[]  = {0xFF, 0xFF, 0x18, 0x18, 0x18, 0x18, 0xFF, 0xFF};   

const unsigned char space[] = {0x00, 0x00, 0x00, 0x00,0x00, 0x00, 0x00, 0x00};

void main()
{
   unsigned int i,j,k;
   GLCD_INIT();

         k = 0;
   
      for(k = 0; k < 4; k++)
      {
         glcd_cmd(0xB8 + k);
      
         for(j = 0; j < 64; j = j+8)
         {
            glcd_cmd(0 + j);
            
            for(i = 0; i < 8; i++)   
            {
               glcd_data(space[i]);
            }
         }
      }

   while(1)
   { 
      glcd_cmd(0xc0);
      glcd_cmd(0xb8); 
      glcd_cmd(0);
      
      i = 0;
      
      for (i = 0; i < 8; i++)
      {
         glcd_data1(data[i]);
      }
   }   
}

void GLCD_INIT()
{
   output_high(RST);     // RESET = 1

   glcd_cmd(0xe2);   //software Reset
   glcd_cmd(0xa0);   //Select ADC = 0
   glcd_cmd(0xa4);   //Static  Drive OFF
   glcd_cmd(0xa9);   //Select Duty = 1 /32
   glcd_cmd(0xc0);   //Set Start Line 0(C0H)~31(DFH)
   glcd_cmd(0xb8);   //Set Page Address 0(B8H)~3(BBH)
   glcd_cmd(0x00);   //Set segment Address 0(00H)~(4FH)
   glcd_cmd(0xaf);   //Set Display ON
}

void glcd_cmd(unsigned char c)
{
   output_low(A0);
   output_low(R_W);
   output_a(c);

   output_high(CS1);
   output_high(CS2);

   output_low(CS1);
   output_low(CS2);
}

void glcd_data(unsigned char z)
{
   output_high(A0);
   output_low(R_W);
   output_a(z);

   output_high(CS1);
   output_high(CS2);

   output_low(CS1);
   output_low(CS2);
}

 

[jayanth.devarayanadurga]

Change Font size.

 

[hemnath]

how to change font size? One page contains 8 bits. how it will get auto incremented to next page when one page value gets overflowed.
do u have any sample program?