94 lines
4.0 KiB
C
94 lines
4.0 KiB
C
/****************************************************************************
|
|
* libc/termios/lib_cfgetspeed.c
|
|
*
|
|
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* 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 <termios.h>
|
|
#include <assert.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: cfgetspeed
|
|
*
|
|
* Descripton:
|
|
* The cfgetspeed() function is a non-POSIX function will extract the baud
|
|
* from the termios structure to which the termiosp argument points.
|
|
*
|
|
* This function will return exactly the value in the termios data
|
|
* structure, without interpretation.
|
|
*
|
|
* NOTE 1: NuttX does not control input/output baud independently. Both
|
|
* must be the same. The POSIX standard interfaces, cfisetispeed() and
|
|
* cfisetospeed() are defined to be cfgetspeed() in termios.h.
|
|
* NOTE 2. In Nuttx, the speed_t is defined to be uint32_t and the baud
|
|
* encodings of termios.h are the actual baud values themselves. Therefore,
|
|
* any baud value may be returned here... not just those enumerated in
|
|
* termios.h
|
|
*
|
|
* Input Parameters:
|
|
* termiosp - The termiosp argument is a pointer to a termios structure.
|
|
*
|
|
* Returned Value:
|
|
* Encoded baud value from the termios structure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
speed_t cfgetspeed(FAR const struct termios *termiosp)
|
|
{
|
|
DEBUGASSERT(termiosp);
|
|
return termiosp->c_speed;
|
|
}
|