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Add a small amount of randomisation into the Zynq demo.

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This commit is contained in:
Richard Barry 2014-02-11 11:37:42 +00:00
parent 0cc51d99a7
commit 4f01401c00
2 changed files with 47 additions and 3 deletions
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44
FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/Full_Demo/main_full.c
View file

@ -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--;
}
}
}

6
FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/main.c
View file

@ -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;
}