Lcd for bit data sending through a 8 bit port

[gravity123]

Hello friends ,
I want to send an 4 bit data to LCD along with the enable and RS data through the same port of an 8 bit controller.
that is the Data is 4 bit consider my data is "C'
controllerport = ((c >> 4) & 0x0f) | EN | RS;
is it correct ?
or how can i send the EN and RS data without affect the c data.

 

[PA3040]

Hello friends ,
I want to send an 4 bit data to LCD along with the enable and RS data through the same port of an 8 bit controller.
that is the Data is 4 bit consider my data is "C'
controllerport = ((c >> 4) & 0x0f) | EN | RS;
is it correct ?
or how can i send the EN and RS data without affect the c data.

Hoped, this will help you
This codes for PIC 16F877a MCU using HI_TECH C compiler and HD44780 compatible LCD
In your case you did not mention MCU and compiler which are using

#define LCD_EN RB3
#define    LCD_RS RB5
#define    LCD_RW RB4
#define LCD_DATA    PORTD
#define    LCD_STROBE()    ((LCD_EN = 1),(LCD_EN=0)

4 bit mode sending data to LCD

void lcddata(unsigned char value)
    {
LCD_RS = 1; 

LCD_DATA= ((val>>4)&0x0F);
LCD_STROBE;
LCD_DATA =(val&0x0F); 
LCD_STROBE;

__delay_ms(10);
    }

8 bit mode sending data to LCD

void lcddata(unsigned char value)
    {
LCD_DATA = value;
LCD_RS = 1; 
LCD_RW = 0;
LCD_EN = 1;
__delay_ms (1);
LCD_EN = 0;

    }

 

[gravity123]

View attachment lcd 4bit.rar

#include <REGX51.H>

#include <stdio.H>

 

 

#define LCDPORT P2
 

sbit RS = LCDPORT ^ 4;

sbit EN = LCDPORT ^ 5;

 

void delay(unsigned int msec)
{

int i, j;

for (i = 0; i < msec; i++)

for (j = 0; j < 1275; j++);

}
 

void LCDSTROBE(void)

{

EN = 1;

    delay(4);
EN = 0;

}

 

void dt(unsigned char c)

{
RS = 1;

delay(50);

LCDPORT = ((c >> 4) & 0x0f);

LCDSTROBE();

    LCDPORT = (c & 0x0F) ;
 

LCDSTROBE();

}

 

void cmd(unsigned char c)
{

RS = 0;

delay(50);

LCDPORT = ((c >> 4) & 0x0f);

    LCDSTROBE();
LCDPORT = (c  & 0x0F);

LCDSTROBE();

}

 

void lcdclear(void)
{

cmd(0x01);

delay(2);

}


 

void lcd_init()

{

delay(15);

    cmd(0x38);
delay(1);

cmd(0x38);

delay(100);

cmd(0x38);

    cmd(0x28);			// Function set (4-bit interface, 2 lines, 5*7Pixels)
	delay(1);
cmd(0x28);			// Function set (4-bit interface, 2 lines, 5*7Pixels)

cmd(0x0c);			// Make cursorinvisible

lcdclear();			// Clear screen

cmd(0x6);			// Set entry Mode(auto increment of cursor)

}
 

void string(const char *q)

{

while (*q) {

	dt(*q++);
}

}

 

 

main()
{

delay(50);

lcd_init();

LCDPORT = 0x00;

 while (1) {
cmd(0x80);

string("HELLO WORLD");

cmd(0xc0);

string("IT IS WORKING:-)");


}

}

This is the my code but it is not working what is the problem .
Am using 8051 with keil
attached full projects with proteus