How to Interface 4-bit & 8-bit Lcd Step by Step

[Faroogh]

Hi Every one Please tell me How to interface 4-bit Lcd Step by Step

 

this My Code for Lcd Initialization

Create a Heade File and past the code in it it Will Work

 

**************************************************************************************************************************************************

#ifndef LCD_H

#define LCD_H

 

 

#include <avr/io.h>

#define F_CPU 1000000UL

#include <util/delay.h>

 

char colmn[2]={0x80,0xC0};

 

#define LcdData PORTB

#define LcdDataDDR DDRB

#define LcdCtrlDDR DDRD

#define LcdCtrl PORTD

#define RS PD0

#define RW PD1

#define E PD2

 

 

 

 

 

void Lcd_Ini(void);

void SendData(unsigned char data);

void LcdString(char *str);

void SendCmd(unsigned char cmd);

void SetCursor(uint8_t x,uint8_t y);

 

 

void Lcd_Ini()

{

SendCmd(0x38);

_delay_us(50);

SendCmd(0x01);

_delay_ms(1);

SendCmd(0x0E);

_delay_us(50);

SendCmd(0x80);

_delay_us(50);

}

void SendData(unsigned char data)

{

 

LcdData = data;

LcdCtrl = (1<<RS)|(0<<RW)|(1<<E);

_delay_us(50);

LcdCtrl = (1<<RS)|(0<<RW)|(0<<E);

return;

 

}

void SendCmd(unsigned char cmd)

{

LcdData = cmd;

LcdCtrl = (0<<RS)|(0<<RW)|(1<<E);

_delay_us(1);

LcdCtrl = (0<<RS)|(0<<RW)|(0<<E);

_delay_ms(1);

return;

 

}

void LcdString(char *str)

{

int i=0;

while(str!='')

{

SendData(str);

i++;

}

}

void SetCursor(uint8_t x,uint8_t y)

{

SendCmd(colmn[y]+x);

}

 

 

 

 

#endif

 

[Hari Prasaath K]

Explain what problem you are facing. Its not clear whether you are asking doubt or providing solution.

[Ashutosh Bhatt]

4 bit LCD mode
Divide 8 bit data in to two 4 bit nibbles using masking
First send higher nibble
Then send lower nibble
Every time for sending 1 byte. You hv to send two nibbles

[Author]

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