Issue GLCD model JHD12864E

youngyik · Feb 18, 2012

Hi all,

Is here anyone expert in using this model GLCD (JHD12684E)?
I needs help here. I have my coding and successful created hex file and Build it, but my GLCD shown dots only. Contrast can control but expected output did not show out.

Anyone knows this problem please help me.

Thanks. =)

Sceadwian · Feb 18, 2012

You need to post your code and schematic of your circuit or there's no possibility of diagnosing your problem.

youngyik · Feb 27, 2012

Hi... Sorry for late reply. Below is my code:

Code:

#include<avr/io.h>
#include<util/delay.h>
#include <avr/pgmspace.h>

//GLCD Module Connections
#define	GLCD_CPRT	PORTC
#define	GLCD_CDDR	DDRC
#define	GLCD_CPIN	PINC
#define GLCD_APIN	PINA
#define GLCD_APRT	PORTA
#define GLCD_ADDR	DDRA
#define	GLCD_BPRT	PORTB
#define	GLCD_BDDR	DDRB
#define	GLCD_BPIN	PINB

//Command Port Bits
#define	GLCD_CSEL1	0
#define	GLCD_CSEL2	1
#define	GLCD_RST	2
#define	GLCD_RS		5
#define	GLCD_RW		6
#define	GLCD_EN		7


void delay_us(unsigned int d)
{
	_delay_us(d);
}

void delay_ms(unsigned int d)
{
	_delay_ms(d);
}

void Enable_Pulse (void)
{
        GLCD_APRT |= (1<<GLCD_EN);	//E pin high
		delay_us(5);
        GLCD_APRT &= ~(1<<GLCD_EN);	//E pin low
		delay_us(5);
}

void GLCD_ON()
{
	GLCD_CDDR = 0xFF;
	GLCD_APRT = 0;
	GLCD_ADDR = 0xFF;
	GLCD_BPRT = 0;
	GLCD_BDDR = 0xFF;
	
	GLCD_BPRT |= (1<<GLCD_CSEL1);
	GLCD_BPRT |= (1<<GLCD_CSEL2);
	GLCD_APRT &= ~(1<<GLCD_RS);
	GLCD_APRT &= ~(1<<GLCD_RW);

	GLCD_CPRT = 0x3F;	//ON command
	Enable_Pulse();
}

void Set_Start_Line(unsigned short line)
{
	GLCD_CDDR = 0xFF;
	GLCD_APRT = 0;
	GLCD_ADDR = 0xFF;
	GLCD_BPRT = 0;
	GLCD_BDDR = 0xFF;
	
	
	GLCD_APRT &= ~(1<<GLCD_RS);
	GLCD_APRT &= ~(1<<GLCD_RW);
	//Activate both chips
	GLCD_BPRT |= (1<<GLCD_CSEL1);
	GLCD_BPRT |= (1<<GLCD_CSEL2);
	GLCD_CPRT = 0xC0 | line;	//Set Address
	Enable_Pulse();
}

void GOTO_COL(unsigned int x)
{
	unsigned short Col_Data;
	GLCD_CDDR = 0xFF;
	GLCD_APRT = 0;
	GLCD_ADDR = 0xFF;
	GLCD_BPRT = 0;
	GLCD_BDDR = 0xFF;
		
	GLCD_APRT &= ~(1<<GLCD_RS);
	GLCD_APRT &= ~(1<<GLCD_RW);
	
	if(x<64)	//Left Half
	{
		GLCD_BPRT |= (1<<GLCD_CSEL1);	//Select Chip1
		GLCD_BPRT &= ~(1<<GLCD_CSEL2);	//Deselect Chip2
		Col_Data = x;
	}
	else
	{
		GLCD_BPRT |= (1<<GLCD_CSEL2);	//Select Chip2
		GLCD_BPRT &= ~(1<<GLCD_CSEL1);	//Deselect Chip1
		Col_Data = x-64;		//Put column address on data port
	}
	Col_Data = (Col_Data | 0x40) & 0x7F;	//Command format
	GLCD_CPRT = Col_Data;
	Enable_Pulse();
}

void GOTO_ROW(unsigned int y)
{
	unsigned short Row_Data;
	GLCD_CDDR = 0xFF;
	GLCD_APRT = 0;
	GLCD_ADDR = 0xFF;
	GLCD_BPRT = 0;
	GLCD_BDDR = 0xFF;

	GLCD_APRT &= ~(1<<GLCD_RS);
	GLCD_APRT &= ~(1<<GLCD_RW);
	Row_Data = (y | 0xB8) & 0xBF;	//Put row address on data port
	GLCD_CPRT = Row_Data;
	Enable_Pulse();
}

void GOTO_XY(unsigned int x,unsigned int y)
{
	GOTO_COL(x);
	GOTO_ROW(y);
}

void GLCD_Write(unsigned short b)
{
	GLCD_CDDR = 0xFF;
	GLCD_APRT = 0;
	GLCD_ADDR = 0xFF;
	GLCD_BPRT = 0;
	GLCD_BDDR = 0xFF;

	GLCD_APRT |= (1<<GLCD_RS);
	GLCD_APRT &= ~(1<<GLCD_RW);
	GLCD_CPRT = b;
	delay_us(1);
	Enable_Pulse();
}

unsigned short GLCD_Read(unsigned short column)
{
	unsigned short read_data = 0;	//Read data here
	GLCD_CDDR = 0x00;
	GLCD_APRT = 0;
	GLCD_ADDR = 0xFF;
	GLCD_BPRT = 0;
	GLCD_BDDR = 0xFF;

	GLCD_APRT |= (1<<GLCD_RS);
	GLCD_APRT |= (1<<GLCD_RW);
	if(column>63)
		GLCD_BPRT = (1<<GLCD_CSEL1);
	else
		GLCD_BPRT = (1<<GLCD_CSEL2);	//Disable/Enable CSEL2
	delay_us(1);
	GLCD_APRT |= (1<<GLCD_EN);	//Latch RAM data into ouput register
	delay_us(1);

	//Dummy read to fetch data from the display RAM
    	GLCD_APRT &= ~(1<<GLCD_EN);	//Low Enable
    	delay_us(5);
    	GLCD_APRT |= (1<<GLCD_EN);	//latch data from output register to data bus
    	delay_us(1);             

    	read_data = GLCD_CPRT;		//Input data
    	GLCD_APRT &= ~(1<<GLCD_EN);     //Low Enable to remove data from the bus
    	delay_us(1);
    	GLCD_CDDR = 0xFF;     		//PORTC is Output again
    	return read_data;
}

void GLCD_ClrIn(unsigned short In)
{
	int i;
	GOTO_XY(0,In);	//At start of line of left side
	GOTO_XY(64,In);	//At start of line of right side
	GLCD_BPRT |= (1<<GLCD_CSEL1);
	for(i=0;i<65;i++)
		GLCD_Write(0);
}

void GLCD_CLR()
{
	unsigned short m;
	for(m=0;m<8;m++)
	{
		GLCD_ClrIn(m);
	}
}

void Draw_Point(unsigned short x,unsigned short y, unsigned short color)
{
    unsigned short Col_Data;;
    GOTO_XY(x,(y/8));
    switch (color)
    {
        case 0:         //Light spot
            Col_Data = ~(1<<(y%8)) & GLCD_Read(x);
        break;
        case 1:         //Dark spot
            Col_Data = (1<<(y%8)) | GLCD_Read(x);
        break;
    }
    GOTO_XY(x,(y/8));
    GLCD_Write(Col_Data);
}

int main(void)
{
	unsigned short u, v;
	
	GLCD_CDDR = 0x00;
 	GLCD_BDDR = 0x00;
	GLCD_ADDR = 0x00;
 	GLCD_BPRT = 0x00;
	GLCD_APRT = 0x00;
 	GLCD_CPRT = 0x00;
 	
	GLCD_BPRT &= ~(1<<GLCD_CSEL1);	// De-Activate both chips
 	GLCD_BPRT &= ~(1<<GLCD_CSEL2);
 	GLCD_BPRT |= (1<<GLCD_RST);
 	GLCD_ON();
 	GLCD_CLR();
 	Set_Start_Line(0);
 	do
	{
		for(u=0; u<64; u+=6)
      		for(v=0; v<128; v+=2)
      			Draw_Point(v, u, 1);
      		delay_ms(1000);
      		GLCD_CLR();
      		delay_ms(1000);
	} 
	while(1);
}

Please advice me. I spend almost 1month but no result. =(
View attachment 61530

youngyik · Feb 27, 2012

Hi... Sorry for late reply. Below is my code:

Code:

#include<avr/io.h>
#include<util/delay.h>
#include <avr/pgmspace.h>

//GLCD Module Connections
#define	GLCD_CPRT	PORTC
#define	GLCD_CDDR	DDRC
#define	GLCD_CPIN	PINC
#define GLCD_APIN	PINA
#define GLCD_APRT	PORTA
#define GLCD_ADDR	DDRA
#define	GLCD_BPRT	PORTB
#define	GLCD_BDDR	DDRB
#define	GLCD_BPIN	PINB

//Command Port Bits
#define	GLCD_CSEL1	0
#define	GLCD_CSEL2	1
#define	GLCD_RST	2
#define	GLCD_RS		5
#define	GLCD_RW		6
#define	GLCD_EN		7


void delay_us(unsigned int d)
{
	_delay_us(d);
}

void delay_ms(unsigned int d)
{
	_delay_ms(d);
}

void Enable_Pulse (void)
{
        GLCD_APRT |= (1<<GLCD_EN);	//E pin high
		delay_us(5);
        GLCD_APRT &= ~(1<<GLCD_EN);	//E pin low
		delay_us(5);
}

void GLCD_ON()
{
	GLCD_CDDR = 0xFF;
	GLCD_APRT = 0;
	GLCD_ADDR = 0xFF;
	GLCD_BPRT = 0;
	GLCD_BDDR = 0xFF;
	
	GLCD_BPRT |= (1<<GLCD_CSEL1);
	GLCD_BPRT |= (1<<GLCD_CSEL2);
	GLCD_APRT &= ~(1<<GLCD_RS);
	GLCD_APRT &= ~(1<<GLCD_RW);

	GLCD_CPRT = 0x3F;	//ON command
	Enable_Pulse();
}

void Set_Start_Line(unsigned short line)
{
	GLCD_CDDR = 0xFF;
	GLCD_APRT = 0;
	GLCD_ADDR = 0xFF;
	GLCD_BPRT = 0;
	GLCD_BDDR = 0xFF;
	
	
	GLCD_APRT &= ~(1<<GLCD_RS);
	GLCD_APRT &= ~(1<<GLCD_RW);
	//Activate both chips
	GLCD_BPRT |= (1<<GLCD_CSEL1);
	GLCD_BPRT |= (1<<GLCD_CSEL2);
	GLCD_CPRT = 0xC0 | line;	//Set Address
	Enable_Pulse();
}

void GOTO_COL(unsigned int x)
{
	unsigned short Col_Data;
	GLCD_CDDR = 0xFF;
	GLCD_APRT = 0;
	GLCD_ADDR = 0xFF;
	GLCD_BPRT = 0;
	GLCD_BDDR = 0xFF;
		
	GLCD_APRT &= ~(1<<GLCD_RS);
	GLCD_APRT &= ~(1<<GLCD_RW);
	
	if(x<64)	//Left Half
	{
		GLCD_BPRT |= (1<<GLCD_CSEL1);	//Select Chip1
		GLCD_BPRT &= ~(1<<GLCD_CSEL2);	//Deselect Chip2
		Col_Data = x;
	}
	else
	{
		GLCD_BPRT |= (1<<GLCD_CSEL2);	//Select Chip2
		GLCD_BPRT &= ~(1<<GLCD_CSEL1);	//Deselect Chip1
		Col_Data = x-64;		//Put column address on data port
	}
	Col_Data = (Col_Data | 0x40) & 0x7F;	//Command format
	GLCD_CPRT = Col_Data;
	Enable_Pulse();
}

void GOTO_ROW(unsigned int y)
{
	unsigned short Row_Data;
	GLCD_CDDR = 0xFF;
	GLCD_APRT = 0;
	GLCD_ADDR = 0xFF;
	GLCD_BPRT = 0;
	GLCD_BDDR = 0xFF;

	GLCD_APRT &= ~(1<<GLCD_RS);
	GLCD_APRT &= ~(1<<GLCD_RW);
	Row_Data = (y | 0xB8) & 0xBF;	//Put row address on data port
	GLCD_CPRT = Row_Data;
	Enable_Pulse();
}

void GOTO_XY(unsigned int x,unsigned int y)
{
	GOTO_COL(x);
	GOTO_ROW(y);
}

void GLCD_Write(unsigned short b)
{
	GLCD_CDDR = 0xFF;
	GLCD_APRT = 0;
	GLCD_ADDR = 0xFF;
	GLCD_BPRT = 0;
	GLCD_BDDR = 0xFF;

	GLCD_APRT |= (1<<GLCD_RS);
	GLCD_APRT &= ~(1<<GLCD_RW);
	GLCD_CPRT = b;
	delay_us(1);
	Enable_Pulse();
}

unsigned short GLCD_Read(unsigned short column)
{
	unsigned short read_data = 0;	//Read data here
	GLCD_CDDR = 0x00;
	GLCD_APRT = 0;
	GLCD_ADDR = 0xFF;
	GLCD_BPRT = 0;
	GLCD_BDDR = 0xFF;

	GLCD_APRT |= (1<<GLCD_RS);
	GLCD_APRT |= (1<<GLCD_RW);
	if(column>63)
		GLCD_BPRT = (1<<GLCD_CSEL1);
	else
		GLCD_BPRT = (1<<GLCD_CSEL2);	//Disable/Enable CSEL2
	delay_us(1);
	GLCD_APRT |= (1<<GLCD_EN);	//Latch RAM data into ouput register
	delay_us(1);

	//Dummy read to fetch data from the display RAM
    	GLCD_APRT &= ~(1<<GLCD_EN);	//Low Enable
    	delay_us(5);
    	GLCD_APRT |= (1<<GLCD_EN);	//latch data from output register to data bus
    	delay_us(1);             

    	read_data = GLCD_CPRT;		//Input data
    	GLCD_APRT &= ~(1<<GLCD_EN);     //Low Enable to remove data from the bus
    	delay_us(1);
    	GLCD_CDDR = 0xFF;     		//PORTC is Output again
    	return read_data;
}

void GLCD_ClrIn(unsigned short In)
{
	int i;
	GOTO_XY(0,In);	//At start of line of left side
	GOTO_XY(64,In);	//At start of line of right side
	GLCD_BPRT |= (1<<GLCD_CSEL1);
	for(i=0;i<65;i++)
		GLCD_Write(0);
}

void GLCD_CLR()
{
	unsigned short m;
	for(m=0;m<8;m++)
	{
		GLCD_ClrIn(m);
	}
}

void Draw_Point(unsigned short x,unsigned short y, unsigned short color)
{
    unsigned short Col_Data;;
    GOTO_XY(x,(y/8));
    switch (color)
    {
        case 0:         //Light spot
            Col_Data = ~(1<<(y%8)) & GLCD_Read(x);
        break;
        case 1:         //Dark spot
            Col_Data = (1<<(y%8)) | GLCD_Read(x);
        break;
    }
    GOTO_XY(x,(y/8));
    GLCD_Write(Col_Data);
}

int main(void)
{
	unsigned short u, v;
	
	GLCD_CDDR = 0x00;
 	GLCD_BDDR = 0x00;
	GLCD_ADDR = 0x00;
 	GLCD_BPRT = 0x00;
	GLCD_APRT = 0x00;
 	GLCD_CPRT = 0x00;
 	
	GLCD_BPRT &= ~(1<<GLCD_CSEL1);	// De-Activate both chips
 	GLCD_BPRT &= ~(1<<GLCD_CSEL2);
 	GLCD_BPRT |= (1<<GLCD_RST);
 	GLCD_ON();
 	GLCD_CLR();
 	Set_Start_Line(0);
 	do
	{
		for(u=0; u<64; u+=6)
      		for(v=0; v<128; v+=2)
      			Draw_Point(v, u, 1);
      		delay_ms(1000);
      		GLCD_CLR();
      		delay_ms(1000);
	} 
	while(1);
}

Please advice me. I spend almost 1month but no result. =(
View attachment 61530

Pommie · Feb 27, 2012

I posted some code for this in this thread.

To see the code that's attached see here. The original link is broken.

Mike.

youngyik · Feb 28, 2012

Hi all, I needs any driver related to my ATmega32 microcontroller to interface with my AVR Studio 4.
Pommie, your code is good but I hope I can get a AVR coding. =)

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Issue GLCD model JHD12864E

youngyik

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Sceadwian

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Pommie

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