MISSING FUNCTION PROTOTYPE

[Achu]

THIS IS MY PROG THAT I HAVE MAKE FOR MY MINI PROJECT BUT KEIL IS GIVING ERROR THAT

1)mini project.c(49): error C267: 'lcddata': requires ANSI-style prototype

2)mini project.c(49): warning C206: 'lcddata': missing function-prototype

I am really weak in coding and i dont know!! hope experts can help me with this….

Program

#include<reg51.h>

sfr LCD=0x80;

sbit RS=P2^6;

sbit EN=P2^7;

unsigned int a=0,i=0,v;

void tm();

void delay(unsigned char time)

{

unsigned int a,b;

for(a=0;a<time;a++)

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

}

void lcdmd(unsigned char value)

{

LCD=value;

RS=1;

EN=1;

delay(10);

EN=0;

}

void lcd_init()

{

lcdmd(0x38);

delay(20);

lcdmd(0x0c);

delay(20);

lcdmd(0x01);

delay(20);

lcdmd(0x06);

delay(20);

}

void ISR_ex0(void)interrupt 0

{

while(1)

{

tm();

a++;

}

}

void ISR_ex1(void) interrupt 2

{

unsigned char m,n,temp,o;

v=100/a;

m=v/100;

temp=v%100;

n=temp/10;

o=temp%10;

lcdmd(0xc6);

lcddata(m+48);

lcddata(n+48);

lcddata(o+48);

a=0;

lcddata('m');

lcddata('m');

lcddata('/');

lcdddata('s');

lcddata('e');

lcddata('c');

lcddata('')

lcddata('')

}

void main()

{

unsigned char w[]="WELCOMESPEED=WAITING…";

IT0=1; //Configure interrupt 0 for falling edge on/INT0 (P3.2)

EX0=1; //Enable EX0 Interrupt

IT1=1; //Configure interrupt 1 for falling edge on/INT0 (P3.2)

EX1=1; //Enable EX1 Interrupt

EA=1; //Enable Global Interrupt Flag

IP=0x04; //Priority of ex 1 high

lcd_int();

lcdcmd(0x84);

for(i=0;i<7;i++)

lcddata(w);

lcdmd(0xc0);

for(i=7;i<13;i++)

lcddata(w);

for(i=13;i<24;i++)

lcddata(w);

while(1)

}

void tm()

{

int y=0;

for(y=0;y<15;y++)

{

TMOD=0x01;

TL0=0xFD;

TH0=0x4B;

TR0=1;

while(TF0==0);

TR0=0;

TF0=0;

}

}

 

Please Help me!! 

[Hari Prasaath K]

You have not created the function for 'lcddata'. only function calling is there. You should write a function defenition and prototype for lcddata. Look the link for tutorial.

https://www.engineersgarage.com/tutorials/keil-interfacing-programs-8051?page=4

[Author]

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