2014-07-05 23:21:13 +02:00
|
|
|
/****************************************************************************
|
|
|
|
|
* net/utils/net_dsec2tick.c
|
|
|
|
|
*
|
|
|
|
|
* Copyright (C) 2014 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 <nuttx/config.h>
|
|
|
|
|
#include <nuttx/clock.h>
|
|
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
|
* Public Functions
|
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
|
|
/****************************************************************************
|
2017-04-22 00:33:14 +02:00
|
|
|
* Name: net_dsec2tick
|
2014-07-05 23:21:13 +02:00
|
|
|
*
|
|
|
|
|
* Description:
|
|
|
|
|
* Convert a decisecond value to a system clock ticks. Used by IGMP logic.
|
|
|
|
|
*
|
|
|
|
|
* Parameters:
|
|
|
|
|
* dsec The decisecond value to convert
|
|
|
|
|
*
|
|
|
|
|
* Returned Value:
|
|
|
|
|
* The decisecond value expressed as system clock ticks
|
|
|
|
|
*
|
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
|
|
int net_dsec2tick(int dsec)
|
|
|
|
|
{
|
|
|
|
|
/* Convert the deci-second comparison value to clock ticks. The CLK_TCK
|
|
|
|
|
* value is the number of clock ticks per second; decisecs argument is the
|
|
|
|
|
* maximum delay in 100's of milliseconds. CLK_TCK/10 is then the number
|
|
|
|
|
* of clock ticks in 100 milliseconds.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
return CLK_TCK * dsec / 10;
|
|
|
|
|
}
|
