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- /*
- * FreeModbus Libary: Linux Port
- * Copyright (C) 2006 Christian Walter <wolti@sil.at>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * File: $Id: porttimer.c,v 1.1 2006/08/01 20:58:50 wolti Exp $
- */
- /* ----------------------- Standard includes --------------------------------*/
- #include <stdlib.h>
- #include <sys/time.h>
- #include "port.h"
- /* ----------------------- Modbus includes ----------------------------------*/
- #include "mb.h"
- #include "mbport.h"
- #include "mbctx.h"
- /* ----------------------- Defines ------------------------------------------*/
- /* ----------------------- Static variables ---------------------------------*/
- ULONG ulTimeOut;
- BOOL bTimeoutEnable;
- static struct timeval xTimeLast;
- /* ----------------------- Start implementation -----------------------------*/
- BOOL
- xMBPortTimersInit(fmodbus_t* ctx, USHORT usTim1Timerout50us )
- {
- ctx->ulTimeOut = usTim1Timerout50us / 20U;
- if( ctx->ulTimeOut == 0 )
- ctx->ulTimeOut = 1;
- return xMBPortSerialSetTimeout(ctx, ctx->ulTimeOut );
- }
- void
- xMBPortTimersClose( fmodbus_t* ctx )
- {
- /* Does not use any hardware resources. */
- }
- void
- vMBPortTimerPoll( fmodbus_t* ctx )
- {
- ULONG ulDeltaMS;
- struct timeval xTimeCur;
- //printf("vMBPortTimerPoll enter\n");//dbg wanggao
- /* Timers are called from the serial layer because we have no high
- * res timer in Win32. */
- if( ctx->bTimeoutEnable )
- {
- if( gettimeofday( &xTimeCur, NULL ) != 0 )
- {
- /* gettimeofday failed - retry next time. */
- }
- else
- {
- ulDeltaMS = ( xTimeCur.tv_sec - ctx->xTimeLast.tv_sec ) * 1000L +
- ( xTimeCur.tv_usec - ctx->xTimeLast.tv_usec ) * 1000L;
- if( ulDeltaMS > ctx->ulTimeOut )
- {
- ctx->bTimeoutEnable = FALSE;
- //printf("expired \n");//dbg wanggao
- ( void )ctx->pxMBPortCBTimerExpired( ctx );
- }
- }
- }
- }
- void
- vMBPortTimersEnable( fmodbus_t* ctx )
- {
- int res = gettimeofday( &ctx->xTimeLast, NULL );
- assert( res == 0 );
- ctx->bTimeoutEnable = TRUE;
- }
- void
- vMBPortTimersDisable( fmodbus_t* ctx )
- {
- ctx->bTimeoutEnable = FALSE;
- }
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