[AVR][Atmega8] KS0108 GLCD 제어

GLCD 제어를 위해서는 DataSheet가 필수적이다.

 

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사용 Chip : Atmega8
사용 Program : Microchip Studio(Ver - 7.0.2542)
                     Proteus 8 Professional

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KS0108은 5개의 제어핀, 8개의 Data핀으로 구성되어 있다.

CS1 = 0 && CS2 = 1  ->  NT1707C(Left) IC를 사용하겠다는 코드이다.

CS1 = 1 && CS2 = 0  ->  NT1708C(Right) IC를 사용하겠다는 코드이다.

 

CS1 = 0 && CS2 = 0  ->  2개의 IC가 활성화 되어 Data를 출력 시 Left , Right 동시에 글자가 입력됨.

 

DI or RS  -> H : Data,        L : Instruction

   R/W    -> H : Read Data, L = Write Data

 

RS = 0 && RW = 0 && DataPin = 0x3F  => GLCD ON

RS = 0 && RW = 0 && DataPin = 0x3E  => GLCD OFF

 

 

Atmel Studio 소스코드 :

/*
 * GccApplication1.c
 *
 * Created: 2021-01-01 오후 10:29:03
 * Author : jh
 */ 

#include <avr/io.h>
#define F_CPU 8000000UL
#include <util/delay.h>
#include "glcd-font.h"

#define  GLCD_DATA_PORT PORTD
#define  GLCD_CTRL_PORT PORTC
#define  GLCD_DPORT_DIR DDRD
#define  GLCD_CPORT_DIR DDRC

#define RS PC0
#define RW PC1
#define E PC2
#define RST PC3
#define CS1 PC4
#define CS2 PC5

void glcd_cmd(unsigned char cmd);
void glcd_dta(unsigned char dta);
void glcd_PageSelect(char pge);
void glcd_writeChar(char *chr);
void glcd_SetCursor(uint8_t x,uint8_t y);
void glcd_writeStr(uint8_t x, uint8_t y, char *str);
void glcd_writeImg(char *pxl);
void glcd_int(void);


int main(void)
{
	glcd_int();
	
    /* Replace with your application code */
    while (1) 
    {
		glcd_writeStr(0, 1, "A");
		glcd_writeStr(0, 2, "APPLE");
		glcd_writeStr(0, 3, "SAMRT PHONE");
		glcd_writeStr(0, 4, "BAAM");
		_delay_ms(1000);
    }
}

void glcd_cmd(unsigned char cmd)
{
	GLCD_CTRL_PORT &= ~(1<<RS);
	GLCD_CTRL_PORT &= ~(1<<RW);
	GLCD_DATA_PORT = cmd;
	GLCD_CTRL_PORT |= (1<<E);
	_delay_ms(1);
	GLCD_CTRL_PORT &= ~(1<<E);
}


void glcd_dta(unsigned char dta)
{
	GLCD_CTRL_PORT |= (1<<RS);
	GLCD_CTRL_PORT &= ~(1<<RW);
	GLCD_DATA_PORT = dta;
	GLCD_CTRL_PORT |= (1<<E);
	_delay_ms(1);
	GLCD_CTRL_PORT &= ~(1<<E);
}

void glcd_SetCursor(uint8_t x, uint8_t y)
{
	if(x>63)
	{
		GLCD_CTRL_PORT &= ~(1<<CS1);
		GLCD_CTRL_PORT |= (1<<CS2);
		glcd_cmd(64+x-64);
		glcd_cmd(184+y);
	}
	else
	{
		GLCD_CTRL_PORT |= (1<<CS1);
		GLCD_CTRL_PORT &= ~(1<<CS2);
		glcd_cmd(64+x);
		glcd_cmd(184+y);
	}
	
	//        X
	//|---------------|
	//|               |      Y
	//|               |    
	//|---------------|
	
	//glcd_cmd(0xB8+x);
	//glcd_cmd(0x40+y);
}

void glcd_writeChar(char *chr)
{
	uint8_t i;
	glcd_SetCursor(0,0);
	for (i=0;i<5;i++)
	{
		glcd_dta(*(chr+i));
	}
}

void glcd_writeStr(uint8_t x, uint8_t y, char *str)
//void glcd_writeStr(char pge, char *str)
{
	int i = 0;
	int startFont = 0, endFont = 0, xNum = 0;
	//glcd_PageSelect(pge);
	while(*str)
	{
		glcd_SetCursor(x+(xNum*6),y);
		startFont = (*str - 32) * 5;
		endFont = startFont + 5;
		for (i=startFont;i<endFont;i++)
		{
			//glcd_dta(sys5x7[i]);
			_delay_ms(1);
		}
		str++;
		xNum++;
	}
}
void glcd_writeImg(char *pxl)
{
	
}

void glcd_int(void)
{
	GLCD_DPORT_DIR = 0xFF;
	GLCD_CPORT_DIR = 0xFF;
	
	GLCD_CTRL_PORT &= ~(1<<RST);
	_delay_ms(10);
	GLCD_CTRL_PORT |= (1<<RST);
	
	glcd_cmd(0x3F);
	glcd_cmd(0xC0);
}

 

회로도 :

 

 

참고 문헌 :

www.sparkfun.com/datasheets/LCD/ks0108b.pdf