Add event groups demo to Zynq demo.

Add C implementations of some standard library functions to the Zynq demo to prevent the GCC libraries (which use floating point registers as scratch registers) being linked in.

FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/FreeRTOSConfig.h

@@ -116,8 +116,8 @@
 #define configUSE_IDLE_HOOK						1
 #define configUSE_TICK_HOOK						1
 #define configMAX_PRIORITIES					( 7 )
-#define configMINIMAL_STACK_SIZE				( ( unsigned short ) 160 )
-#define configTOTAL_HEAP_SIZE					( ( size_t ) ( 51200 ) )
+#define configMINIMAL_STACK_SIZE				( ( unsigned short ) 200 )
+#define configTOTAL_HEAP_SIZE					( ( size_t ) ( 65536 ) )
 #define configMAX_TASK_NAME_LEN					( 10 )
 #define configUSE_TRACE_FACILITY				1
 #define configUSE_16_BIT_TICKS					0

FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/Full_Demo/main_full.c

@@ -143,6 +143,7 @@
 #include "TimerDemo.h"
 #include "QueueOverwrite.h"
 #include "IntQueue.h"
+#include "EventGroupsDemo.h"
 
 /* Priorities for the demo application tasks. */
 #define mainSEM_TEST_PRIORITY				( tskIDLE_PRIORITY + 1UL )
@@ -243,6 +244,7 @@ void main_full( void )
 	vStartMathTasks( mainFLOP_TASK_PRIORITY );
 	vStartTimerDemoTask( mainTIMER_TEST_PERIOD );
 	vStartQueueOverwriteTask( mainQUEUE_OVERWRITE_PRIORITY );
+	vStartEventGroupTasks();
 
 	/* Start the tasks that implements the command console on the UART, as
 	described above. */
@@ -366,6 +368,11 @@ unsigned long ulErrorFound = pdFALSE;
 			ulErrorFound = pdTRUE;
 		}
 
+		if( xAreEventGroupTasksStillRunning() != pdPASS )
+		{
+			ulErrorFound = pdTRUE;
+		}
+
 		/* Check that the register test 1 task is still running. */
 		if( ulLastRegTest1Value == ulRegTest1LoopCounter )
 		{

FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/main.c

@@ -74,12 +74,15 @@
  * This file implements the code that is not demo specific, including the
  * hardware setup and FreeRTOS hook functions.
  *
- * NOTE:  The full demo includes a test that checks the floating point context
- * is maintained correctly across task switches.  The standard GCC libraries can
- * use floating point registers and made this test fail (unless the tasks that
- * use the library are given a floating point context as described on the
- * documentation page for this demo).  printf-stdarg.c is included in this
- * project to prevent the standard GCC libraries being linked into the project.
+ * !!! IMPORTANT NOTE !!!
+ * The GCC libraries that ship with the Xilinx SDK make use of the floating
+ * point registers.  To avoid this causing corruption it is necessary to avoid
+ * their use.  For this reason main.c contains very basic C implementations of
+ * the standard C library functions memset(), memcpy() and memcmp(), which are
+ * are used by FreeRTOS itself.  Defining these functions in the project 
+ * prevents the linker pulling them in from the library.  Any other standard C
+ * library functions that are used by the application must likewise be defined
+ * in C.
  *
  * ENSURE TO READ THE DOCUMENTATION PAGE FOR THIS PORT AND DEMO APPLICATION ON
  * THE http://www.FreeRTOS.org WEB SITE FOR FULL INFORMATION ON USING THIS DEMO
@@ -99,6 +102,7 @@
 #include "partest.h"
 #include "TimerDemo.h"
 #include "QueueOverwrite.h"
+#include "EventGroupsDemo.h"
 
 /* Xilinx includes. */
 #include "platform.h"
@@ -109,7 +113,7 @@
 
 /* Set mainCREATE_SIMPLE_BLINKY_DEMO_ONLY to one to run the simple blinky demo,
 or 0 to run the more comprehensive test and demo application. */
-#define mainCREATE_SIMPLE_BLINKY_DEMO_ONLY	1
+#define mainCREATE_SIMPLE_BLINKY_DEMO_ONLY	0
 
 /*-----------------------------------------------------------*/
 
@@ -158,7 +162,7 @@ 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();
 	}
@@ -281,6 +285,59 @@ void vApplicationTickHook( void )
 
 		/* Call the periodic queue overwrite from ISR demo. */
 		vQueueOverwritePeriodicISRDemo();
+
+		/* Call the periodic event group from ISR demo. */
+		vPeriodicEventGroupsProcessing();
 	}
 	#endif
 }
+/*-----------------------------------------------------------*/
+
+void *memcpy( void *pvDest, const void *pvSource, size_t ulBytes )
+{
+unsigned char *pcDest = ( unsigned char * ) pvDest, *pcSource = ( unsigned char * ) pvSource;
+size_t x;
+
+	for( x = 0; x < ulBytes; x++ )
+	{
+		*pcDest = *pcSource;
+		pcDest++;
+		pcSource++;
+	}
+
+	return pvDest;
+}
+/*-----------------------------------------------------------*/
+
+void *memset( void *pvDest, int iValue, size_t ulBytes )
+{
+unsigned char *pcDest = ( unsigned char * ) pvDest;
+size_t x;
+
+	for( x = 0; x < ulBytes; x++ )
+	{
+		*pcDest = ( unsigned char ) c;
+		pcDest++;
+	}
+
+	return pvDest;
+}
+/*-----------------------------------------------------------*/
+
+int memcmp( const void *pvMem1, const void *pvMem2 ,size_t ulBytes )
+{
+const unsigned char *pucMem1 = pvMem1, *pucMem2 = pvMem2;
+size_t x;
+
+    for( x = 0; x < ulBytes; x++ )
+    {
+        if( pucMem1[ x ] != pucMem2[ x ] )
+        {
+            break;
+        }
+    }
+
+    return n - x;
+}
+
+