Diff: ModBus/porttimer.cpp

Revision:

0:f54e9507171b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ModBus/porttimer.cpp	Mon Dec 05 22:49:02 2011 +0000
@@ -0,0 +1,78 @@
+/*
+ * FreeModbus Libary: BARE 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 2006/08/22 21:35:13 wolti Exp $
+ */
+
+/* ----------------------- System includes ----------------------------------*/
+#include "mbed.h"           // Cam
+
+/* ----------------------- Platform includes --------------------------------*/
+#include "port.h"
+
+/* ----------------------- Modbus includes ----------------------------------*/
+#include "mb.h"
+#include "mbport.h"
+
+/* ----------------------- static functions ---------------------------------*/
+static void prvvTIMERExpiredISR( void );
+
+/* ----------------------- System Variables ---------------------------------*/
+Timeout toMBUS;             // Cam - mbed timeout
+static ULONG usInterval;    // Cam - timeout interval in microseconds 
+
+/* ----------------------- Start implementation -----------------------------*/
+BOOL
+xMBPortTimersInit( USHORT usTim1Timerout50us )
+{
+    usInterval = 50 * usTim1Timerout50us;
+    return TRUE;
+}
+
+
+/*inline*/ void
+vMBPortTimersEnable(  )
+{
+    /* Enable the timer with the timeout passed to xMBPortTimersInit( ) */
+    
+    // Cam - firstly detach from any existing timeout
+    toMBUS.detach();
+    // Cam - now attach the timeout to the prvvTIMERExpiredISR routine    
+    toMBUS.attach_us(&prvvTIMERExpiredISR, usInterval); 
+}
+
+/*inline*/ void
+vMBPortTimersDisable(  )
+{
+    /* Disable any pending timers. */
+    
+    // Cam - disable further interrupts by detaching
+    toMBUS.detach();
+}
+
+/* Create an ISR which is called whenever the timer has expired. This function
+ * must then call pxMBPortCBTimerExpired( ) to notify the protocol stack that
+ * the timer has expired.
+ */
+static void prvvTIMERExpiredISR( void )
+{
+    ( void )pxMBPortCBTimerExpired(  );
+    // Cam - disable further interrupts by detaching
+    toMBUS.detach(); 
+}
+