teste de delay em microcontroladores PIC

delayfunc.c

#define DELAY 4 
#include <time.h> 
#include <stdio.h> 

int main(void) 
{ 
  time_t begin, end; 

  end = begin = time(NULL); 
  printf("blah blah"); 
  while ((end - begin) < DELAY) 
  { 
    end = time(NULL); 
  } 
  printf("blah blah blah"); 

  return 0; 
}