From fcfd6c4d7ca3cc8d2751652a79a08d64eb8ec5a3 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Sat, 21 Jul 2012 14:56:21 +0000
Subject: FreeModBus is now integrated with the Nuttx configuration system

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4961 42af7a65-404d-4744-a932-0658087f49c3
---
 apps/modbus/nuttx/porttimer.c | 98 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 apps/modbus/nuttx/porttimer.c

(limited to 'apps/modbus/nuttx/porttimer.c')

diff --git a/apps/modbus/nuttx/porttimer.c b/apps/modbus/nuttx/porttimer.c
new file mode 100644
index 000000000..c440e4f1f
--- /dev/null
+++ b/apps/modbus/nuttx/porttimer.c
@@ -0,0 +1,98 @@
+/*
+ * 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 <nuttx/config.h>
+#include <stdlib.h>
+#include <sys/time.h>
+
+#include "port.h"
+
+/* ----------------------- Modbus includes ----------------------------------*/
+#include "mb.h"
+#include "mbport.h"
+
+/* ----------------------- Defines ------------------------------------------*/
+
+/* ----------------------- Static variables ---------------------------------*/
+ULONG           ulTimeOut;
+BOOL            bTimeoutEnable;
+
+static struct timeval xTimeLast;
+
+/* ----------------------- Start implementation -----------------------------*/
+BOOL
+xMBPortTimersInit( USHORT usTim1Timerout50us )
+{
+    ulTimeOut = usTim1Timerout50us / 20U;
+    if( ulTimeOut == 0 )
+        ulTimeOut = 1;
+
+    return xMBPortSerialSetTimeout( ulTimeOut );
+}
+
+void
+xMBPortTimersClose(  )
+{
+    /* Does not use any hardware resources. */
+}
+
+void
+vMBPortTimerPoll(  )
+{
+    ULONG           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 );
+
+    assert( res == 0 );
+    bTimeoutEnable = TRUE;
+}
+
+void
+vMBPortTimersDisable(  )
+{
+    bTimeoutEnable = FALSE;
+}
-- 
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