Kvaser Linux CANLIB

readTimerTest.c

/*
**                Copyright 2012 by Kvaser AB, Mölndal, Sweden
**                        http://www.kvaser.com
**
** This software is dual licensed under the following two licenses:
** BSD-new and GPLv2. You may use either one. See the included
** COPYING file for details.
**
** License: BSD-new
** ===============================================================================
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are met:
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**       notice, this list of conditions and the following disclaimer.
**     * Redistributions in binary form must reproduce the above copyright
**       notice, this list of conditions and the following disclaimer in the
**       documentation and/or other materials provided with the distribution.
**     * Neither the name of the <organization> nor the
**       names of its contributors may be used to endorse or promote products
**       derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
** DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
** DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
** (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
** SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**
**
** License: GPLv2
** ===============================================================================
** This program is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License
** as published by the Free Software Foundation; either version 2
** of the License, or (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
**
** ---------------------------------------------------------------------------
**/

/*
 * Kvaser Linux Canlib
 * Read timer test
 */

#include <stdio.h>
#include <canlib.h>
#include <unistd.h>
#include <sys/time.h>


int main (int argc, char *argv[])
{
  unsigned long time, last = 0, lastsys = 0;
  char errorString[50];
  canHandle h;
  struct timeval tv;
  
  h = canOpenChannel(1, 0);
  if (h < 0) {
    canGetErrorText(h, errorString, 50);
    printf("%s\n", errorString);
  } 

  while (1) {
    if (canReadTimer(h, &time) != canOK) {
      break;
    }
    printf("Time=%ld ms (%ld)\n", time, time - last);
    gettimeofday(&tv, NULL);
    printf("system:%ld\n", tv.tv_sec * 1000 + tv.tv_usec / 1000 - lastsys);
    last = time;
    lastsys = tv.tv_sec * 1000 + tv.tv_usec / 1000;
    sleep(1);
  }
  printf("canReadTimer failed\n");
  canClose(h);

  return 0;
}