116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/****************************************************************************
|
|
* apps/modbus/nuttx/porttimer.c
|
|
*
|
|
* FreeModbus Library: NuttX Port
|
|
* Copyright (c) 2006 Christian Walter <wolti@sil.at>
|
|
* All rights reserved.
|
|
*
|
|
* 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. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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/time.h>
|
|
#include <stdlib.h>
|
|
#include <assert.h>
|
|
|
|
#include "port.h"
|
|
|
|
#include "modbus/mb.h"
|
|
#include "modbus/mbport.h"
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
uint32_t ulTimeOut;
|
|
bool bTimeoutEnable;
|
|
|
|
static struct timeval xTimeLast;
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
bool xMBPortTimersInit(uint16_t usTim1Timerout50us)
|
|
{
|
|
ulTimeOut = usTim1Timerout50us / 20U;
|
|
if (ulTimeOut == 0)
|
|
{
|
|
ulTimeOut = 1;
|
|
}
|
|
|
|
return xMBPortSerialSetTimeout(ulTimeOut);
|
|
}
|
|
|
|
void xMBPortTimersClose()
|
|
{
|
|
/* Does not use any hardware resources. */
|
|
}
|
|
|
|
void vMBPortTimerPoll()
|
|
{
|
|
uint32_t ulDeltaMS;
|
|
struct timeval xTimeCur;
|
|
|
|
/* Timers are called from the serial layer because we have no high
|
|
* res timer in Win32.
|
|
*/
|
|
|
|
if (bTimeoutEnable)
|
|
{
|
|
if (gettimeofday(&xTimeCur, NULL) != 0)
|
|
{
|
|
/* gettimeofday failed - retry next time. */
|
|
}
|
|
else
|
|
{
|
|
ulDeltaMS = (xTimeCur.tv_sec - xTimeLast.tv_sec) * 1000L +
|
|
(xTimeCur.tv_usec - xTimeLast.tv_usec) * 1000L;
|
|
if (ulDeltaMS > ulTimeOut)
|
|
{
|
|
bTimeoutEnable = false;
|
|
(void)pxMBPortCBTimerExpired();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void vMBPortTimersEnable()
|
|
{
|
|
int res = gettimeofday(&xTimeLast, NULL);
|
|
|
|
DEBUGASSERT(res == 0);
|
|
bTimeoutEnable = true;
|
|
}
|
|
|
|
void vMBPortTimersDisable()
|
|
{
|
|
bTimeoutEnable = false;
|
|
}
|