programming 8×2 LCD (pc0802A)

[werytretr]

Hello! anyone know how to program a 8×2 LCD (8051) with silicon laboratories? I just need to display words on the LCD.. need help urgently! please help me!! (:

[werytretr]

how to edit from this.

 

#include <c8051f340.h>
#include <stdio.h>
#include <stdlib.h>

#define cmdport P0
#define dataport P1
#define q 100
sbit rs = cmdport^4;  //register select pin
sbit rw = cmdport^5;  // read write pin
sbit e = cmdport^6;  //enable pin

void delay(unsigned int msec)  // Function to provide time delay in msec.
{
int i,j ;
for(i=0;i<msec;i++)
for(j=0;j<1275;j++);
}

void lcdcmd(unsigned char item)  //Function to send command to LCD
{
dataport = item;
rs= 0;
rw=0;
e=1;
delay(1);
e=0;
}

void lcddata(unsigned char item)  //Function to send data to LCD
{
dataport = item;
rs= 1;
rw=0;
e=1;
delay(1);
e=0;
}

void main()
{
lcdcmd(0x38);  // for using 8-bit 2 row mode of LCD
delay(100);
lcdcmd(0x38);
delay(100);
lcdcmd(0x38);
delay(100);
lcdcmd(0x0E);  // turn display ON for cursor blinking
delay(100);
lcdcmd(0x01);  //clear screen
delay(100);
lcdcmd(0x06);  //display ON
delay(100);
lcdcmd(0x86);  // bring cursor to position 6 of line 1
delay(100);
lcddata(‘A’);
}

 

[Shailesh Tambe]

May I know, do you want to use both the lines of LCD ?

[Shailesh Tambe]

Try out this code……………… it should work

 

 

#include<reg51.h>

#include<string.h>

 

sbit rs = P2^0;

sbit rw = P2^1;

sbit en = P2^2;

sbit  b = P1^7;

 

void writecmd(unsigned char a);

void writedat(unsigned char b);

void busy();

void writestr(unsigned char *s);

void delay(unsigned int msec);

 

void writecmd(unsigned char a)

{

 busy();

 rs=0;

 rw=0;

 P1=a;

 en=1;

 en=0;

}

 

void writedat(unsigned char b)

{

 busy();

 rs=1;

 rw=0;

 P1=b;

 en=1;

 en=0;

}

 

void busy()

{

 en=0;

 P1=0xFF;

 rs=0;

 rw=1;

 while(b==1)

 {

  en=0;

  en=1;

 }

 en=0;

}

 

void writestr(unsigned char *s)

{

 unsigned char i,len;

 len=strlen(s);

 for(i=0;i<len;i++)

 {

  writedat(*s);

  s++;

 }

}

 

void delay(unsigned int msec)

{

 int count1,count2;

 for(count1=0;count1<msec;count1++)

 for(count2=0;count2<1275;count2++);

}

 

void main()

{

 P1=0x00;

 P2=0x00;

 

  writecmd(0x3C); // Initialize the LCD

  delay(50);

  writecmd(0x0E); // turn display ON for cursor blinking

  delay(50);

  writecmd(0x01);  //Clear the LCD Screen

  delay(50);

  writecmd(0x06);

  delay(50);

  writestr(“HAPPY”);

  delay(50);

  writecmd(0xC0);

  delay(50);

  writestr(“BIRTHDAY”);

  delay(50);

  while(1);

 

}

[werytretr]

erms, it still don’t work.. im using port 1 for PB0~PB7, P0.2 for EN, P0.1 for R/W, P0.0 for RS.. what does your b define as? is it PB0~PB7? im using this lcd, with datasheet inside.. http://singapore.rs-online.com/web/p/lcd-displays-alphanumeric/2143288/?searchTerm=214+3288&relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D6265724D504E266C753D656E266D6D3D6D61746368616C6C26706D3D5E5C647B337D5B5C732D2F255C2E5D5C647B332C347D2426706F3D313426736E3D592673743D52535F53544F434B5F4E554D424552267573743D32313420333238382677633D4E4F4E4526

 

guess i need to add #include < c8051f340.h> as header for sure because im using silicon lab. (:

[Shailesh Tambe]

You have to do some necessary changes in the program as per the microcontroller, the connections and the LCD that you might be using. This program is for 16×2 LCD using P89V51RD2 Microcontroller. ‘b’ in this program is defined as PB7 to check the LCD status.

[Author]

Posts