busparms.c
/*
** Copyright 2017 by Kvaser AB, Molndal, 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:
** * Redistributions of source code must retain the above copyright
** 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 THE COPYRIGHT OWNER OR CONTRIBUTORS BE
** LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
** BUSINESS INTERRUPTION) HOWEVER CAUSED AND 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
**
**
** IMPORTANT NOTICE:
** ==============================================================================
** This source code is made available for free, as an open license, by Kvaser AB,
** for use with its applications. Kvaser AB does not accept any liability
** whatsoever for any third party patent or other immaterial property rights
** violations that may result from any usage of this source code, regardless of
** the combination of source code and various applications that it can be used
** in, or with.
**
** -----------------------------------------------------------------------------
*/
/*
* Kvaser Linux Canlib
* Set bus parameters and read them back
*/
#include <canlib.h>
#include <stdio.h>
static void check(char* id, canStatus stat)
{
if (stat != canOK) {
char buf[50];
buf[0] = '\0';
canGetErrorText(stat, buf, sizeof(buf));
printf("%s: failed, stat=%d (%s)\n", id, (int)stat, buf);
}
}
int main(int argc, char *argv[])
{
long freq;
unsigned int tseg1, tseg2, sjw, noSamp, syncmode;
canStatus stat = -1;
int j;
canHandle hnd[2];
(void)argc; // Unused.
(void)argv; // Unused.
canInitializeLibrary();
for(j = 0 ; j < 2 ; j++) {
hnd[j] = canOpenChannel(j, canOPEN_EXCLUSIVE | canOPEN_REQUIRE_EXTENDED);
if (hnd[j] < 0) {
printf("canOpenChannel (%d) failed\n", j);
return -1;
}
stat = canSetBusParams(hnd[j], 500000, 4, 3, 1, 1, 0);
check("canSetBusParams", stat);
}
printf("\n");
for (j = 0; j < 2; j++) {
stat = canGetBusParams(hnd[j], &freq, &tseg1, &tseg2, &sjw, &noSamp, &syncmode);
printf("hnd[%d]:freq %ld, tseg1 %u, tseg2 %u, sjw %u, noSamp %u, syncmode %u\n ",
j, freq, tseg1, tseg2, sjw, noSamp, syncmode);
check("canGetBusParams", stat);
}
stat = canUnloadLibrary();
check("canUnloadLibrary", stat);
return 0;
}