20100923-V6.1.0-RC2/Demo/PIC18_WizC/Demo3/interrupt.c

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+/*
+    FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.
+
+    ***************************************************************************
+    *                                                                         *
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+    *                                                                         *
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+    *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *
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+    *                                                                         *
+    ***************************************************************************
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
+    ***NOTE*** The exception to the GPL is included to allow you to distribute
+    a combined work that includes FreeRTOS without being obliged to provide the
+    source code for proprietary components outside of the FreeRTOS kernel.
+    FreeRTOS 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 General Public License for
+    more details. You should have received a copy of the GNU General Public 
+    License and the FreeRTOS license exception along with FreeRTOS; if not it 
+    can be viewed here: http://www.freertos.org/a00114.html and also obtained 
+    by writing to Richard Barry, contact details for whom are available on the
+    FreeRTOS WEB site.
+
+    1 tab == 4 spaces!
+
+    http://www.FreeRTOS.org - Documentation, latest information, license and
+    contact details.
+
+    http://www.SafeRTOS.com - A version that is certified for use in safety
+    critical systems.
+
+    http://www.OpenRTOS.com - Commercial support, development, porting,
+    licensing and training services.
+*/
+
+/* 
+Changes from V3.0.0
+	+ Added functionality to only call vTaskSwitchContext() once
+	  when handling multiple interruptsources in a single interruptcall.
+
+	+ Included Filenames changed to a .c extension to allow stepping through
+	  code using F7.
+
+Changes from V3.0.1
+*/
+
+#include <pic.h>
+
+/* Scheduler include files. */
+#include <FreeRTOS.h>
+#include <task.h>
+#include <queue.h>
+
+static bit uxSwitchRequested;
+
+/*
+ * Vector for the ISR.
+ */
+void pointed Interrupt()
+{
+	/*
+	 * Save the context of the current task.
+	 */
+	portSAVE_CONTEXT( portINTERRUPTS_FORCED );
+
+	/*
+	 * No contextswitch requested yet
+	 */
+	uxSwitchRequested	= pdFALSE;
+	
+	/*
+	 * Was the interrupt the FreeRTOS SystemTick?
+	 */
+	#include <libFreeRTOS/Drivers/Tick/isrTick.c>
+
+/*******************************************************************************
+** DO NOT MODIFY ANYTHING ABOVE THIS LINE
+********************************************************************************
+** Enter the includes for the ISR-code of the FreeRTOS drivers below.
+**
+** You cannot use local variables. Alternatives are:
+** - Use static variables	(Global RAM usage increases)
+** - Call a function		(Additional cycles are needed)
+** - Use unused SFR's		(preferred, no additional overhead)
+** See "../Serial/isrSerialTx.c" for an example of this last option
+*******************************************************************************/
+
+
+
+	/*
+	 * Was the interrupt a byte being received?
+	 */
+	#include "../Serial/isrSerialRx.c"
+
+
+	/*
+	 * Was the interrupt the Tx register becoming empty?
+	 */
+	#include "../Serial/isrSerialTx.c"
+
+
+
+/*******************************************************************************
+** DO NOT MODIFY ANYTHING BELOW THIS LINE
+*******************************************************************************/
+	/*
+	 * Was a contextswitch requested by one of the
+	 * interrupthandlers?
+	 */
+	 if ( uxSwitchRequested )
+	 {
+	 	vTaskSwitchContext();
+	 }
+	 
+	/*
+	 * Restore the context of the (possibly other) task.
+	 */
+	portRESTORE_CONTEXT();
+
+	#pragma asmline retfie	0
+}