FreeRTOS: Added FreeRTOS 7.0.1, including hook in libmaple/systick.c and example blinky.

1 files changed, 197 insertions, 0 deletions

diff --git a/libraries/FreeRTOS/utility/list.c b/libraries/FreeRTOS/utility/list.c
new file mode 100755
index 0000000..872b7dd
--- /dev/null
+++ b/libraries/FreeRTOS/utility/list.c
@@ -0,0 +1,197 @@
+/*
+    FreeRTOS V7.0.1 - Copyright (C) 2011 Real Time Engineers Ltd.
+	
+
+	FreeRTOS supports many tools and architectures. V7.0.0 is sponsored by:
+	Atollic AB - Atollic provides professional embedded systems development 
+	tools for C/C++ development, code analysis and test automation.  
+	See http://www.atollic.com
+	
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS tutorial books are available in pdf and paperback.        *
+     *    Complete, revised, and edited pdf reference manuals are also       *
+     *    available.                                                         *
+     *                                                                       *
+     *    Purchasing FreeRTOS documentation will not only help you, by       *
+     *    ensuring you get running as quickly as possible and with an        *
+     *    in-depth knowledge of how to use FreeRTOS, it will also help       *
+     *    the FreeRTOS project to continue with its mission of providing     *
+     *    professional grade, cross platform, de facto standard solutions    *
+     *    for microcontrollers - completely free of charge!                  *
+     *                                                                       *
+     *    >>> See http://www.FreeRTOS.org/Documentation for details. <<<     *
+     *                                                                       *
+     *    Thank you for using FreeRTOS, and thank you for your support!      *
+     *                                                                       *
+    ***************************************************************************
+
+
+    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 modification 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.
+*/
+
+
+#include <stdlib.h>
+#include "FreeRTOS.h"
+#include "list.h"
+
+/*-----------------------------------------------------------
+ * PUBLIC LIST API documented in list.h
+ *----------------------------------------------------------*/
+
+void vListInitialise( xList *pxList )
+{
+	/* The list structure contains a list item which is used to mark the
+	end of the list.  To initialise the list the list end is inserted
+	as the only list entry. */
+	pxList->pxIndex = ( xListItem * ) &( pxList->xListEnd );
+
+	/* The list end value is the highest possible value in the list to
+	ensure it remains at the end of the list. */
+	pxList->xListEnd.xItemValue = portMAX_DELAY;
+
+	/* The list end next and previous pointers point to itself so we know
+	when the list is empty. */
+	pxList->xListEnd.pxNext = ( xListItem * ) &( pxList->xListEnd );
+	pxList->xListEnd.pxPrevious = ( xListItem * ) &( pxList->xListEnd );
+
+	pxList->uxNumberOfItems = ( unsigned portBASE_TYPE ) 0U;
+}
+/*-----------------------------------------------------------*/
+
+void vListInitialiseItem( xListItem *pxItem )
+{
+	/* Make sure the list item is not recorded as being on a list. */
+	pxItem->pvContainer = NULL;
+}
+/*-----------------------------------------------------------*/
+
+void vListInsertEnd( xList *pxList, xListItem *pxNewListItem )
+{
+volatile xListItem * pxIndex;
+
+	/* Insert a new list item into pxList, but rather than sort the list,
+	makes the new list item the last item to be removed by a call to
+	pvListGetOwnerOfNextEntry.  This means it has to be the item pointed to by
+	the pxIndex member. */
+	pxIndex = pxList->pxIndex;
+
+	pxNewListItem->pxNext = pxIndex->pxNext;
+	pxNewListItem->pxPrevious = pxList->pxIndex;
+	pxIndex->pxNext->pxPrevious = ( volatile xListItem * ) pxNewListItem;
+	pxIndex->pxNext = ( volatile xListItem * ) pxNewListItem;
+	pxList->pxIndex = ( volatile xListItem * ) pxNewListItem;
+
+	/* Remember which list the item is in. */
+	pxNewListItem->pvContainer = ( void * ) pxList;
+
+	( pxList->uxNumberOfItems )++;
+}
+/*-----------------------------------------------------------*/
+
+void vListInsert( xList *pxList, xListItem *pxNewListItem )
+{
+volatile xListItem *pxIterator;
+portTickType xValueOfInsertion;
+
+	/* Insert the new list item into the list, sorted in ulListItem order. */
+	xValueOfInsertion = pxNewListItem->xItemValue;
+
+	/* If the list already contains a list item with the same item value then
+	the new list item should be placed after it.  This ensures that TCB's which
+	are stored in ready lists (all of which have the same ulListItem value)
+	get an equal share of the CPU.  However, if the xItemValue is the same as
+	the back marker the iteration loop below will not end.  This means we need
+	to guard against this by checking the value first and modifying the
+	algorithm slightly if necessary. */
+	if( xValueOfInsertion == portMAX_DELAY )
+	{
+		pxIterator = pxList->xListEnd.pxPrevious;
+	}
+	else
+	{
+		/* *** NOTE ***********************************************************
+		If you find your application is crashing here then likely causes are:
+			1) Stack overflow -
+			   see http://www.freertos.org/Stacks-and-stack-overflow-checking.html
+			2) Incorrect interrupt priority assignment, especially on Cortex-M3
+			   parts where numerically high priority values denote low actual
+			   interrupt priories, which can seem counter intuitive.  See
+			   configMAX_SYSCALL_INTERRUPT_PRIORITY on http://www.freertos.org/a00110.html
+			3) Calling an API function from within a critical section or when
+			   the scheduler is suspended.
+			4) Using a queue or semaphore before it has been initialised or
+			   before the scheduler has been started (are interrupts firing
+			   before vTaskStartScheduler() has been called?).
+		See http://www.freertos.org/FAQHelp.html for more tips.
+		**********************************************************************/
+		
+		for( pxIterator = ( xListItem * ) &( pxList->xListEnd ); pxIterator->pxNext->xItemValue <= xValueOfInsertion; pxIterator = pxIterator->pxNext )
+		{
+			/* There is nothing to do here, we are just iterating to the
+			wanted insertion position. */
+		}
+	}
+
+	pxNewListItem->pxNext = pxIterator->pxNext;
+	pxNewListItem->pxNext->pxPrevious = ( volatile xListItem * ) pxNewListItem;
+	pxNewListItem->pxPrevious = pxIterator;
+	pxIterator->pxNext = ( volatile xListItem * ) pxNewListItem;
+
+	/* Remember which list the item is in.  This allows fast removal of the
+	item later. */
+	pxNewListItem->pvContainer = ( void * ) pxList;
+
+	( pxList->uxNumberOfItems )++;
+}
+/*-----------------------------------------------------------*/
+
+void vListRemove( xListItem *pxItemToRemove )
+{
+xList * pxList;
+
+	pxItemToRemove->pxNext->pxPrevious = pxItemToRemove->pxPrevious;
+	pxItemToRemove->pxPrevious->pxNext = pxItemToRemove->pxNext;
+	
+	/* The list item knows which list it is in.  Obtain the list from the list
+	item. */
+	pxList = ( xList * ) pxItemToRemove->pvContainer;
+
+	/* Make sure the index is left pointing to a valid item. */
+	if( pxList->pxIndex == pxItemToRemove )
+	{
+		pxList->pxIndex = pxItemToRemove->pxPrevious;
+	}
+
+	pxItemToRemove->pvContainer = NULL;
+	( pxList->uxNumberOfItems )--;
+}
+/*-----------------------------------------------------------*/
+