83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
/****************************************************************************
|
|
* canutils/canlib/canlib_getbaud.c
|
|
*
|
|
* Copyright (C) 2016 Sebastien Lorquet. All rights reserved.
|
|
* Author: Sebastien Lorquet <sebastien@lorquet.fr>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
* 3. Neither the name NuttX 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/ioctl.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <nuttx/can.h>
|
|
|
|
/****************************************************************************
|
|
* Name: canlib_getbaud
|
|
*
|
|
* Description:
|
|
* Wrapper for CANIOC_GET_BITTIMING
|
|
*
|
|
* Input Parameter:
|
|
* fd - file descriptor of an opened can device
|
|
* baud - pointer to a buffer to store the current baud rate
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success. Otherwise -1 (ERROR)
|
|
* is returned with the errno variable set to indicate the
|
|
* nature of the error.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int canlib_getbaud(int fd, FAR int *bauds)
|
|
{
|
|
int ret;
|
|
struct canioc_bittiming_s timings;
|
|
|
|
ret = ioctl(fd, CANIOC_GET_BITTIMING, (unsigned long)&timings);
|
|
if (ret != OK)
|
|
{
|
|
canerr("CANIOC_GET_BITTIMING failed, errno=%d\n", errno);
|
|
return 0;
|
|
}
|
|
|
|
*bauds = timings.bt_baud;
|
|
|
|
return ret;
|
|
}
|