From cb4c4b95e78189ebbc835fed7692f1b6ca924c47 Mon Sep 17 00:00:00 2001
From: richardbarry <richardbarry@1d2547de-c912-0410-9cb9-b8ca96c0e9e2>
Date: Sun, 11 May 2008 13:19:05 +0000
Subject: [PATCH] Added optional inclusion of floating point tasks.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@346 1d2547de-c912-0410-9cb9-b8ca96c0e9e2
---
 .../RTOSDemo/FreeRTOSConfig.h                 | 11 +++++++
 .../PPC405_Xilinx_Virtex4_GCC/RTOSDemo/main.c | 32 +++++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/Demo/PPC405_Xilinx_Virtex4_GCC/RTOSDemo/FreeRTOSConfig.h b/Demo/PPC405_Xilinx_Virtex4_GCC/RTOSDemo/FreeRTOSConfig.h
index 42fc96bd6..1f5ef7902 100644
--- a/Demo/PPC405_Xilinx_Virtex4_GCC/RTOSDemo/FreeRTOSConfig.h
+++ b/Demo/PPC405_Xilinx_Virtex4_GCC/RTOSDemo/FreeRTOSConfig.h
@@ -74,6 +74,8 @@
 #define configUSE_TRACE_FACILITY		0
 #define configCHECK_FOR_STACK_OVERFLOW	2
 #define configUSE_COUNTING_SEMAPHORES	1
+#define configUSE_APPLICATION_TASK_TAG	0
+#define configUSE_FPU					0
 
 
 /* Co-routine definitions. */
@@ -96,4 +98,13 @@ to exclude the API function. */
 #define configUSE_RECURSIVE_MUTEXES		1
 
 
+#if configUSE_FPU == 1
+	/* Include the header that define the traceTASK_SWITCHED_IN() and
+	traceTASK_SWITCHED_OUT() macros to save and restore the floating
+	point registers for tasks that have requested this behaviour. */
+	#include "FPU_Macros.h"
+#endif
+
 #endif /* FREERTOS_CONFIG_H */
+
+
diff --git a/Demo/PPC405_Xilinx_Virtex4_GCC/RTOSDemo/main.c b/Demo/PPC405_Xilinx_Virtex4_GCC/RTOSDemo/main.c
index 3e6b8eaad..6e4e31621 100644
--- a/Demo/PPC405_Xilinx_Virtex4_GCC/RTOSDemo/main.c
+++ b/Demo/PPC405_Xilinx_Virtex4_GCC/RTOSDemo/main.c
@@ -95,6 +95,8 @@
 #include "partest.h"
 #include "countsem.h"
 #include "recmutex.h"
+#include "flop.h"
+#include "flop-reg-test.h"
 
 /* Priorities assigned to the demo tasks. */
 #define mainCHECK_TASK_PRIORITY			( tskIDLE_PRIORITY + 4 )
@@ -176,6 +178,24 @@ int main( void )
 	vStartCountingSemaphoreTasks();
 	vStartRecursiveMutexTasks();
 
+	#if ( configUSE_FPU == 1 )
+	{
+		/* To use floating point:
+			
+			0) Add the files contained in the RTOSDemo/flop directory to the 
+			   build.
+			1) Your FPGA hardware design needs to add the APU FPU.  This should
+			   then also make the compiler options change to include the option
+			   -mfpu=sp_full, but best to check.
+			2) Set configUSE_FPU to 1 in FreeRTOSConfig.h.
+			3) Set configUSE_APPLICATION_TASK_TAG to 1 in FreeRTOSConfig.h.
+			4) Ensure #include "FPU_Macros.h" is contained within 
+			   FreeRTOSConfig.h (as per this example). */
+		vStartMathTasks( mainFLOP_PRIORITY );
+		vStartFlopRegTests();
+	}
+	#endif
+
 	/* Create the tasks defined within this file. */
 	xTaskCreate( prvRegTestTask1, "Regtest1", configMINIMAL_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );
 	xTaskCreate( prvRegTestTask2, "Regtest2", configMINIMAL_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );
@@ -264,6 +284,18 @@ static unsigned portLONG ulLastRegTest1Counter= 0UL, ulLastRegTest2Counter = 0UL
 		lReturn = pdFAIL;
 	}
 
+	#if ( configUSE_FPU == 1 )
+		if( xAreMathsTaskStillRunning() != pdTRUE )
+		{
+			lReturn = pdFAIL;
+		}
+
+		if( xAreFlopRegisterTestsStillRunning() != pdTRUE )
+		{
+			lReturn = pdFAIL;
+		}
+	#endif
+
 	/* Have the register test tasks found any errors? */
 	if( xRegTestStatus != pdPASS )
 	{
-- 
2.39.2