From 1fcd6afe0a56aadf38ef501ebb8820370e15a455 Mon Sep 17 00:00:00 2001
From: rtel <rtel@1d2547de-c912-0410-9cb9-b8ca96c0e9e2>
Date: Tue, 11 Feb 2014 11:37:42 +0000
Subject: [PATCH] Add a small amount of randomisation into the Zynq demo.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2200 1d2547de-c912-0410-9cb9-b8ca96c0e9e2
---
 .../RTOSDemo/src/Full_Demo/main_full.c        | 44 +++++++++++++++++++
 .../CORTEX_A9_Zynq_ZC702/RTOSDemo/src/main.c  |  6 +--
 2 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/Full_Demo/main_full.c b/FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/Full_Demo/main_full.c
index 7c716b613..a6d353fc7 100644
--- a/FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/Full_Demo/main_full.c
+++ b/FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/Full_Demo/main_full.c
@@ -218,6 +218,13 @@ extern void vRegisterSampleCLICommands( void );
  */
 extern void vUARTCommandConsoleStart( uint16_t usStackSize, UBaseType_t uxPriority );
 
+/*
+ * A high priority task that does nothing other than execute at a pseudo random
+ * time to ensure the other test tasks don't just execute in a repeating
+ * pattern.
+ */
+static void prvPseudoRandomiser( void *pvParameters );
+
 /*-----------------------------------------------------------*/
 
 /* The following two variables are used to communicate the status of the
@@ -257,6 +264,9 @@ void main_full( void )
 	xTaskCreate( prvRegTestTaskEntry1, "Reg1", configMINIMAL_STACK_SIZE, mainREG_TEST_TASK_1_PARAMETER, tskIDLE_PRIORITY, NULL );
 	xTaskCreate( prvRegTestTaskEntry2, "Reg2", configMINIMAL_STACK_SIZE, mainREG_TEST_TASK_2_PARAMETER, tskIDLE_PRIORITY, NULL );
 
+	/* Create the task that just adds a little random behaviour. */
+	xTaskCreate( prvPseudoRandomiser, "Rnd", configMINIMAL_STACK_SIZE, NULL, configMAX_PRIORITIES - 1, NULL );
+
 	/* Create the task that performs the 'check' functionality,	as described at
 	the top of this file. */
 	xTaskCreate( prvCheckTask, "Check", configMINIMAL_STACK_SIZE, NULL, mainCHECK_TASK_PRIORITY, NULL );
@@ -450,6 +460,40 @@ static void prvRegTestTaskEntry2( void *pvParameters )
 }
 /*-----------------------------------------------------------*/
 
+static void prvPseudoRandomiser( void *pvParameters )
+{
+const uint32_t ulMultiplier = 0x015a4e35UL, ulIncrement = 1UL, ulMinDelay = ( 35 / portTICK_PERIOD_MS );
+volatile uint32_t ulNextRand = ( uint32_t ) &pvParameters, ulValue;
+
+	/* This task does nothing other than ensure there is a little bit of
+	disruption in the scheduling pattern of the other tasks.  Normally this is
+	done by generating interrupts at pseudo random times. */
+	for( ;; )
+	{
+		ulNextRand = ( ulMultiplier * ulNextRand ) + ulIncrement;
+		ulValue = ( ulNextRand >> 16UL ) & 0xffUL;
+
+		if( ulValue < ulMinDelay )
+		{
+			ulValue = ulMinDelay;
+		}
+
+		vTaskDelay( ulValue );
+
+		while( ulValue > 0 )
+		{
+			__asm volatile( "NOP" );
+			__asm volatile( "NOP" );
+			__asm volatile( "NOP" );
+			__asm volatile( "NOP" );
+
+			ulValue--;
+		}
+	}
+}
+
+
+
 
 
 
diff --git a/FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/main.c b/FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/main.c
index 29d160a68..079ba9953 100644
--- a/FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/main.c
+++ b/FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/main.c
@@ -316,7 +316,7 @@ size_t x;
 
 	for( x = 0; x < ulBytes; x++ )
 	{
-		*pcDest = ( unsigned char ) c;
+		*pcDest = ( unsigned char ) iValue;
 		pcDest++;
 	}
 
@@ -324,7 +324,7 @@ size_t x;
 }
 /*-----------------------------------------------------------*/
 
-int memcmp( const void *pvMem1, const void *pvMem2 ,size_t ulBytes )
+int memcmp( const void *pvMem1, const void *pvMem2, size_t ulBytes )
 {
 const unsigned char *pucMem1 = pvMem1, *pucMem2 = pvMem2;
 size_t x;
@@ -337,7 +337,7 @@ size_t x;
         }
     }
 
-    return n - x;
+    return ulBytes - x;
 }
 
 
-- 
2.39.5