PIC and XC8 Compiler issue

Question

Im sure Im missing something simple, and obvious, but I am tired of searching for the answer. Im using a PIC16F688 and XC8 compiler.

The compiler user manual says that there is a delay function __delay_ms(). It says that _XTAL_FREQ must be defined.

Here is my code, but it does not accept the command. What is wrong?

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

#define _XTAL_FREQ 20000000

#include<xc.h>

    int main(int argc, char** argv) {


       _delay_ms(4);

    return (EXIT_SUCCESS);

Solution 1

They are right, the problem was experienced by older versions of the IDE's. I have found it helpful to use:

while(1){
//Invert LED state
LED = !LED;
//Delay ~1 second (4MHz Internal Clock)
_delay(1000000); //specify clock cycles directly
}

To solve the problem.

Solution 2

Please include "htc.h"

#include <stdio.h>
#include <stdlib.h>
#include <xc.h>
#include <htc.h>

#define _XTAL_FREQ 20000000

int main(int argc, char** argv) {


       _delay_ms(4);

    return (EXIT_SUCCESS);
}

Solution 3

What does it mean "it does not accept the command"? Compiler cannot find function _delay_ms()? Maybe you should use proper name with two underscores __delay_ms()?

Moreover, why you do not close main function with }? It is only a typo in your post or in your real code?