[SOLVED] what is the procedure for creating a header file in Mplab8xc

[thannara123]

I want to make My-own some header file .what is the procedure to do that ?


Trying to make the following code in .h file ,But saying the the __delay(); function some error .ie unable to resolve identify the .

#define _XTAL_FREQ 8000000
#define LCDPORT PORTB
#define RS RB2
#define E RB3
//#define LIINE2 lcd_cmd(0xc0)


void latch(void)
{
    E = 1;
    __delay_ms(1);
    E = 0;


}
void lcd_cmd(unsigned char c)   // used to send the command / Instruction to the lcd port
{
RS = 0;    // send a '0' value to select to send command
__delay_ms(1);
LCDPORT = c & 0xf0;  //  send  the command c only 4 bit by masking the lower bit
latch();
__delay_ms(1);
LCDPORT =  (c << 4); // giving the lowerbit  by shifting the 4 bit to left
latch();
}
 void lcd_data(unsigned char c)
 {
 RS =1;    // send 1 to send data
 __delay_ms(1);
LCDPORT = c & 0xf0 | 0x4; //send  the data  only  4 bit by masking the lower bit and also making the RS pin high by giving 0x04 .
__delay_ms(1);
latch();


LCDPORT = (c << 4)| 0x4; ; // giving the lower bit  by shifting the 4 bit to left
latch();
}


 void lcd_init()
{
 __delay_ms(20);
    lcd_cmd(0x30);  //as per data sheet
  __delay_ms(20);
    lcd_cmd(0x30);    //as per data sheet
  __delay_ms(4);
    lcd_cmd(0x32);    //as per data sheet
 __delay_ms(4);
    lcd_cmd(0x28);            // Function set (4-bit interface, 2 lines, 5*7Pixels)
    lcd_cmd(0x28);            // Function set (4-bit interface, 2 lines, 5*7Pixels)
    lcd_cmd(0x0c);            // Make cursorinvisible
    lcd_cmd(0x6);            // Set entry Mode(auto increment of cursor)
}


 void string(const char *q)    // used to send single charcter to display the lcd
{
    while (*q) {
        lcd_data(*q++);
    }
}

I triedout include xc.h file but nothing happend ?

 

[xenos]

You can create file, from file->New (of course) and save with .h extension.
Normally .h file don't contain function bodies (although it is not forbidden), but structures and other type definitions, #define statements, function references and variable references.

If you want to move code to other file, move it to a .c file and add it to your project. Linker will do the rest.

In your case, you tried to use a function that the compiler was not aware of. You could #include the necessary headers in your header if you want to write code inside.

 

[thannara123]

where can i write the body of the function ?

 

[xenos]

//main.c

#include "mine.h"
void main(){
       foo();
}

//foo.c
#include "mine.h"
void foo(void){
 printf("hello world\n");
}

//mine.h
#include <stdio.h>
void foo(void);

 

[thannara123]

But I cant acces the __delay_ms() function foo.c ?

 

[xenos]

The __delay_ms() is it a function of yours, or a library function?
If it's yours, you should place the declaration in the header .h file:

void __delay_ms(int n);

or something like that

If it's a library function, you should #include the library .h file in the .c required.