pulseOut.c

/*
 * @file pulseOut.c
 *
 * @author Andy Lindsay
 *
 * @version 0.85
 *
 * @copyright Copyright (C) Parallax, Inc. 2012.  See end of file for
 * terms of use (MIT License).
 *
 * @brief pulseOut function source, see simpletools.h for documentation.
 *
 * @detail Please submit bug reports, suggestions, and improvements to
 * this code to editor@parallax.com.
 */
 
#include "simpletools.h"                      // simpletools function prototypes
 
void pulse_out(int pin, int time)              // pulseOut function definition
{
  /*
  if(st_iodt == 0)
  {
    set_io_dt(CLKFREQ/1000000);
    set_io_timeout(CLKFREQ/4);
  }
  */
  signed long phsVal = -time * st_iodt;
  //int ctr = 0;
  int frq = 1;
  int phs = 0;
  int state = get_output(pin);
  if(state == 1)
  {
    phsVal = -phsVal;
    phs = -1;
    frq = -1;
  }
  if (CTRA == 0)
  {
    PHSA = phs;
    FRQA = frq;
    CTRA = pin;
    CTRA += (4 << 26);
    low(pin);
    PHSA = phsVal;
    while(get_state(pin) != state);
    set_output(pin, state);
    CTRA = 0;
  }
  else if (CTRB == 0)
  {
    PHSA = phs;
    FRQA = frq;
    CTRA = pin;
    CTRA += (4 << 26);
    low(pin);
    PHSA = phsVal;
    while(get_state(pin) != state);
    set_output(pin, state);
    CTRA = 0;
  }
}