FreeRTOS source changes:

+ heap_1.c and heap_2.c now support configAPPLICATION_ALLOCATED_HEAP (heap_4.c already did) which allows the heap to be placed by the user rather than the linker.

Demo app changes:
+ SAMD20 project has been updated to use Atmel Studio 7.

FreeRTOS/Demo/CORTEX_M0+_Atmel_SAMD20_XPlained/RTOSDemo/RTOSDemo.cproj

@@ -2,7 +2,7 @@
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="Build">
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
-    <ProjectVersion>6.1</ProjectVersion>
+    <ProjectVersion>7.0</ProjectVersion>
     <ProjectGuid>{2a475b6a-78b0-4237-8947-341bd379ab5c}</ProjectGuid>
     <Name>$(MSBuildProjectName)</Name>
     <AssemblyName>$(MSBuildProjectName)</AssemblyName>
@@ -165,7 +165,7 @@
         <documentation help="http://asf.atmel.com/docs/3.11.0/common.applications.user_application.xplained_pro2.samd20_xplained_pro/html/index.html" />
         <offline-documentation help="" />
         <dependencies>
-          <content-extension eid="atmel.asf" uuidref="Atmel.ASF" version="3.11.0" />
+          <content-extension eid="atmel.asf" uuidref="Atmel.ASF" version="3.18.1" />
         </dependencies>
         <project id="common.applications.user_application.xplained_pro2.samd20_xplained_pro" value="Add" config="" content-id="Atmel.ASF" />
         <board id="board.samd20_xplained_pro" value="Add" config="" content-id="Atmel.ASF" />
@@ -216,6 +216,8 @@
       <ToolNumber>000591000435</ToolNumber>
       <ToolName>J-Link</ToolName>
     </com_atmel_avrdbg_tool_samice>
+    <preserveEEPROM>true</preserveEEPROM>
+    <ExternalProgrammingToolCommand />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
     <ToolchainSettings>
@@ -282,38 +284,6 @@
   </armgcc.linker.libraries.LibrarySearchPaths>
   <armgcc.linker.optimization.GarbageCollectUnusedSections>True</armgcc.linker.optimization.GarbageCollectUnusedSections>
   <armgcc.linker.miscellaneous.LinkerFlags>-Wl,--entry=Reset_Handler -Wl,--cref -mthumb -T../src/ASF/sam0/utils/linker_scripts/samd20/gcc/samd20j18_flash.ld</armgcc.linker.miscellaneous.LinkerFlags>
-  <armgcc.assembler.general.IncludePaths>
-    <ListValues>
-      <Value>../src</Value>
-      <Value>../src/ASF/common/boards</Value>
-      <Value>../src/ASF/common/utils</Value>
-      <Value>../src/ASF/sam0/boards</Value>
-      <Value>../src/ASF/sam0/boards/samd20_xplained_pro</Value>
-      <Value>../src/ASF/sam0/drivers/port</Value>
-      <Value>../src/ASF/sam0/drivers/system</Value>
-      <Value>../src/ASF/sam0/drivers/system/clock</Value>
-      <Value>../src/ASF/sam0/drivers/system/interrupt</Value>
-      <Value>../src/ASF/sam0/drivers/system/pinmux</Value>
-      <Value>../src/ASF/sam0/utils</Value>
-      <Value>../src/ASF/sam0/utils/cmsis/samd20/include</Value>
-      <Value>../src/ASF/sam0/utils/cmsis/samd20/include/component</Value>
-      <Value>../src/ASF/sam0/utils/cmsis/samd20/include/instance</Value>
-      <Value>../src/ASF/sam0/utils/cmsis/samd20/include/pio</Value>
-      <Value>../src/ASF/sam0/utils/cmsis/samd20/source</Value>
-      <Value>../src/ASF/sam0/utils/header_files</Value>
-      <Value>../src/ASF/sam0/utils/preprocessor</Value>
-      <Value>../src/ASF/thirdparty/CMSIS/Include</Value>
-      <Value>../src/ASF/thirdparty/CMSIS/Lib/GCC</Value>
-      <Value>../src/config</Value>
-      <Value>%24(ToolchainDir)\..\..\CMSIS_Atmel</Value>
-      <Value>%24(ToolchainDir)\..\..\CMSIS_Atmel\CMSIS\Include</Value>
-      <Value>%24(ToolchainDir)\..\..\CMSIS_Atmel\Device\ATMEL</Value>
-      <Value>%24(ToolchainDir)\..\..\CMSIS_Atmel\Device\ATMEL\samd20\include</Value>
-      <Value>../src/ASF/common/services/serial</Value>
-      <Value>../src/ASF/sam0/drivers/sercom</Value>
-      <Value>../src/ASF/sam0/drivers/sercom/usart</Value>
-    </ListValues>
-  </armgcc.assembler.general.IncludePaths>
   <armgcc.preprocessingassembler.general.AssemblerFlags>-DARM_MATH_CM0=true -DBOARD=SAMD20_XPLAINED_PRO -D__SAMD20J18__ -DUSART_CALLBACK_MODE=true</armgcc.preprocessingassembler.general.AssemblerFlags>
   <armgcc.preprocessingassembler.general.IncludePaths>
     <ListValues>
@@ -419,38 +389,6 @@
   </armgcc.linker.libraries.LibrarySearchPaths>
   <armgcc.linker.optimization.GarbageCollectUnusedSections>True</armgcc.linker.optimization.GarbageCollectUnusedSections>
   <armgcc.linker.miscellaneous.LinkerFlags>-Wl,--entry=Reset_Handler -Wl,--cref -mthumb -T../src/ASF/sam0/utils/linker_scripts/samd20/gcc/samd20j18_flash.ld</armgcc.linker.miscellaneous.LinkerFlags>
-  <armgcc.assembler.general.IncludePaths>
-    <ListValues>
-      <Value>../src</Value>
-      <Value>../src/ASF/common/boards</Value>
-      <Value>../src/ASF/common/utils</Value>
-      <Value>../src/ASF/sam0/boards</Value>
-      <Value>../src/ASF/sam0/boards/samd20_xplained_pro</Value>
-      <Value>../src/ASF/sam0/drivers/port</Value>
-      <Value>../src/ASF/sam0/drivers/system</Value>
-      <Value>../src/ASF/sam0/drivers/system/clock</Value>
-      <Value>../src/ASF/sam0/drivers/system/interrupt</Value>
-      <Value>../src/ASF/sam0/drivers/system/pinmux</Value>
-      <Value>../src/ASF/sam0/utils</Value>
-      <Value>../src/ASF/sam0/utils/cmsis/samd20/include</Value>
-      <Value>../src/ASF/sam0/utils/cmsis/samd20/include/component</Value>
-      <Value>../src/ASF/sam0/utils/cmsis/samd20/include/instance</Value>
-      <Value>../src/ASF/sam0/utils/cmsis/samd20/include/pio</Value>
-      <Value>../src/ASF/sam0/utils/cmsis/samd20/source</Value>
-      <Value>../src/ASF/sam0/utils/header_files</Value>
-      <Value>../src/ASF/sam0/utils/preprocessor</Value>
-      <Value>../src/ASF/thirdparty/CMSIS/Include</Value>
-      <Value>../src/ASF/thirdparty/CMSIS/Lib/GCC</Value>
-      <Value>../src/config</Value>
-      <Value>%24(ToolchainDir)\..\..\CMSIS_Atmel</Value>
-      <Value>%24(ToolchainDir)\..\..\CMSIS_Atmel\CMSIS\Include</Value>
-      <Value>%24(ToolchainDir)\..\..\CMSIS_Atmel\Device\ATMEL</Value>
-      <Value>%24(ToolchainDir)\..\..\CMSIS_Atmel\Device\ATMEL\samd20\include</Value>
-      <Value>../src/ASF/common/services/serial</Value>
-      <Value>../src/ASF/sam0/drivers/sercom</Value>
-      <Value>../src/ASF/sam0/drivers/sercom/usart</Value>
-    </ListValues>
-  </armgcc.assembler.general.IncludePaths>
   <armgcc.assembler.debugging.DebugLevel>Default (-g)</armgcc.assembler.debugging.DebugLevel>
   <armgcc.preprocessingassembler.general.AssemblerFlags>-DARM_MATH_CM0=true -DBOARD=SAMD20_XPLAINED_PRO -D__SAMD20J18__ -DUSART_CALLBACK_MODE=true</armgcc.preprocessingassembler.general.AssemblerFlags>
   <armgcc.preprocessingassembler.general.IncludePaths>

FreeRTOS/Demo/CORTEX_M0+_Atmel_SAMD20_XPlained/RTOSDemo/src/main.c

@@ -137,7 +137,7 @@ int main (void)
 
 	/* The mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting is described at the top
 	of this file. */
-	#if mainCREATE_SIMPLE_BLINKY_DEMO_ONLY == 1
+	#if( mainCREATE_SIMPLE_BLINKY_DEMO_ONLY == 1 )
 	{
 		main_blinky();
 	}

FreeRTOS/License/license.txt

@@ -1,17 +1,30 @@
+The FreeRTOS open source license covers the FreeRTOS source files,
+which are located in the /FreeRTOS/Source directory of the official FreeRTOS
+download.  It also covers most of the source files in the demo application
+projects, which are located in the /FreeRTOS/Demo directory of the official
+FreeRTOS download.  The demo projects may also include third party software that
+is not part of FreeRTOS and is licensed separately to FreeRTOS.  Examples of
+third party software includes header files provided by chip or tools vendors,
+linker scripts, peripheral drivers, etc.  All the software in subdirectories of
+the /FreeRTOS directory is either open source or distributed with permission,
+and is free for use.  For the avoidance of doubt, refer to the comments at the
+top of each source file.
+
 ----------------------------------------------------------------------------
 
-NOTE: The modification to the GPL documented below is included to allow you to
-distribute a combined work that includes FreeRTOS without being obliged to
-provide the source code for proprietary components.
+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.
 
 ----------------------------------------------------------------------------
 
-The FreeRTOS GPL Exception Text:
+Applying to FreeRTOS V8.2.3 up to the latest version, the FreeRTOS GPL Exception
+Text follows:
 
-Any FreeRTOS source code, whether modified or in it's original release form,
+Any FreeRTOS *source code*, whether modified or in it's original release form,
 or whether in whole or in part, can only be distributed by you under the terms
-of version 2 of the GNU General Public License plus this exception.  An
-independent module is a module which is not derived from or based on FreeRTOS.
+of the GNU General Public License plus this exception.  An independent module is
+a module which is not derived from or based on FreeRTOS.
 
 Clause 1:
 
@@ -35,9 +48,12 @@ express permission of Real Time Engineers Ltd. (this is the norm within the
 industry and is intended to ensure information accuracy).
 
 
+
 --------------------------------------------------------------------
 
-The standard GPL v2 text follows:
+
+
+The standard GPL V2 text:
 
 
 		    GNU GENERAL PUBLIC LICENSE

FreeRTOS/Source/portable/MemMang/heap_1.c

@@ -91,7 +91,15 @@ task.h is included from an application file. */
 #define configADJUSTED_HEAP_SIZE	( configTOTAL_HEAP_SIZE - portBYTE_ALIGNMENT )
 
 /* Allocate the memory for the heap. */
-static uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
+/* Allocate the memory for the heap. */
+#if( configAPPLICATION_ALLOCATED_HEAP == 1 )
+	/* The application writer has already defined the array used for the RTOS
+	heap - probably so it can be placed in a special segment or address. */
+	extern uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
+#else
+	static uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
+#endif /* configAPPLICATION_ALLOCATED_HEAP */
+
 static size_t xNextFreeByte = ( size_t ) 0;
 
 /*-----------------------------------------------------------*/
@@ -102,12 +110,14 @@ void *pvReturn = NULL;
 static uint8_t *pucAlignedHeap = NULL;
 
 	/* Ensure that blocks are always aligned to the required number of bytes. */
-	#if portBYTE_ALIGNMENT != 1
+	#if( portBYTE_ALIGNMENT != 1 )
+	{
 		if( xWantedSize & portBYTE_ALIGNMENT_MASK )
 		{
 			/* Byte alignment required. */
 			xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) );
 		}
+	}
 	#endif
 
 	vTaskSuspendAll();

FreeRTOS/Source/portable/MemMang/heap_2.c

@@ -97,7 +97,14 @@ task.h is included from an application file. */
 static void prvHeapInit( void );
 
 /* Allocate the memory for the heap. */
-static uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
+#if( configAPPLICATION_ALLOCATED_HEAP == 1 )
+	/* The application writer has already defined the array used for the RTOS
+	heap - probably so it can be placed in a special segment or address. */
+	extern uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
+#else
+	static uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
+#endif /* configAPPLICATION_ALLOCATED_HEAP */
+
 
 /* Define the linked list structure.  This is used to link free blocks in order
 of their size. */
@@ -127,7 +134,7 @@ static size_t xFreeBytesRemaining = configADJUSTED_HEAP_SIZE;
  */
 #define prvInsertBlockIntoFreeList( pxBlockToInsert )								\
 {																					\
-BlockLink_t *pxIterator;																\
+BlockLink_t *pxIterator;															\
 size_t xBlockSize;																	\
 																					\
 	xBlockSize = pxBlockToInsert->xBlockSize;										\