amarsinghkashyap
Newbie level 1
hi I m working with LCD 1602a on atmega8l. i have written a program for displaying some word on lcd. but there is some problem i m facind during compiling my program. There are some error related to undeclared function. can any one help me. Error are shown at the end of program. I m using avr studio 4. and my program is..
these error are showing during compiling....................
Code:
#define F_CPU 1000000UL // 1MHz
#define RW PC_4
#define RS PC_3
#define EN PC_5
#define DATA PB
#define ATMEGA8_H
#include <atmega8.h>
#include <inttypes.h>
#include <avr/io.h>
#include <util/delay.h>
void delay(int n); //universal Delay routine for your code; can be customised for your use.
void s_inst(void); //Send Instruction Function Select routine
void s_data(void); //Send Data Select routine
void s_latch(void); // Latch Data/Instruction on LCD Databus.
void main(void) //Main function
{
int k=0;
char x[4]="HARI"; //you can name it whatever you want.
char y[7]="LAKSHMI"; //You can name it whatever you want.
RS=0; //Initialize RS=0 for selecting instruction Send
RW=0; //Select RW=0 to write Instruction/data on EN=1; //EN=1 for unlatch. (used at initial condition)
delay(100000); //some LCDs takes time to initialize at startup
s_inst(); //Call Instruction Select routine
DATA=0X38; //Send This instruction on Databus Port 2 on LCD databus.
s_latch(); //Latch this above instruction 4 times
s_latch();
s_latch();
s_latch();
DATA=0X0F;// Send Second Instruction on Port 2.
s_latch();
DATA=0X10; // Set cursor on line 1. Use 0xC0 to write on line 2.
s_latch(); //Latch the above instruction 1 time.
DATA=0X0; //Before changing to write data select. Make port 2 =0x0 so that LCD receives nothing
s_data(); //Change the input type to Data.(before it was instruction input)
s_latch(); //Latch the above instruction once.
for(k=0;k<=4;k++)
{
DATA=x[k]; //It will send x[0]='M' as = 0x4D on Port 2.
s_latch(); //Latch the above instruction only once. Or it will clone each character twice if you latch twice.
}
//to type on line 2 call instruction routine first then send instruction on port 2.
s_inst(); //Instruction Select routine called
DATA=0XC0; // Set cursor on line 2. Use 0x10 to write on line 1.
s_latch();
DATA=0X0; //Before changing to write data select. Make port 2 =0x0 so that LCD receives nothing
s_data(); //Change the input type to Data.(before it was instruction input)
//Now it will show Fernandes on line 2.
for(k=0;k<=6;k++)
{
DATA=y[k]; //It will send y[0]='F' as = 0x45 on Port 2.
s_latch(); //Latch the above instruction only once. Or it will clone each character twice if you latch twice.
}
while(1); //infinite loop after completing task
}
void delay(int n) //Universal delay routine
{
int i=0,j=0;
for(i=0;i<=n;i++)
for(j=0;j<=10;j++);
}
void s_inst(void) //Instruction select routine
{
RS=0;
RW=0;
}
void s_data(void) // Data select routine
{
RS=1;
RW=0;
}
void s_latch(void) // Latch routine
{
EN=1;
delay(1000);
EN=0;
delay(1000);
}these error are showing during compiling....................
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