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Changes to the FreeRTOS code:

Browse source 
+ Introduced xTaskCreateStatic() to allow tasks to be created without any dynamic memory allocation.
+ When a task notification is used to unblock a task from an ISR, but the xHigherPriorityTaskWoken parameter is not used, then pend a context switch to occur during the next tick interrupt.

Demo application changes:
+ Updated TaskNotify.c to test the case where a task is unblocked by an ISR, but does not use its xHigherPriorityTaskWoken parameter.
+ Updated the Win32 MSVC project to test statically allocated tasks being created and deleted.
+ Introduced StaticAllocation.c standard demo task.
This commit is contained in:
Richard Barry 2015-12-20 13:44:21 +00:00
parent 7d6609f8db
commit ea95020ffd
15 changed files with 839 additions and 115 deletions
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26
FreeRTOS/Demo/Common/Minimal/TaskNotify.c
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@ -425,6 +425,7 @@ static void prvNotifiedTask( void *pvParameters )
{
const TickType_t xMaxPeriod = pdMS_TO_TICKS( 90 ), xMinPeriod = pdMS_TO_TICKS( 10 ), xDontBlock = 0;
TickType_t xPeriod;
const uint32_t ulCyclesToRaisePriority = 50UL;
/* Remove compiler warnings about unused parameters. */
( void ) pvParameters;
@ -482,9 +483,28 @@ TickType_t xPeriod;
the function call. */
ulTimerNotificationsReceived += ulTaskNotifyTake( pdTRUE, xPeriod );
/* Wait for the next notification again, clearing all notifications if
one is received, but this time blocking indefinitely. */
ulTimerNotificationsReceived += ulTaskNotifyTake( pdTRUE, portMAX_DELAY );
/* Occasionally raise the priority of the task being notified to test
the path where the task is notified from an ISR and becomes the highest
priority ready state task, but the pxHigherPriorityTaskWoken parameter
is NULL (which it is in the tick hook that sends notifications to this
task. */
if( ( ulNotifyCycleCount % ulCyclesToRaisePriority ) == 0 )
{
vTaskPrioritySet( xTaskToNotify, configMAX_PRIORITIES - 1 );
/* Wait for the next notification again, clearing all notifications if
one is received, but this time blocking indefinitely. */
ulTimerNotificationsReceived += ulTaskNotifyTake( pdTRUE, portMAX_DELAY );
/* Reset the priority. */
vTaskPrioritySet( xTaskToNotify, notifyTASK_PRIORITY );
}
else
{
/* Wait for the next notification again, clearing all notifications if
one is received, but this time blocking indefinitely. */
ulTimerNotificationsReceived += ulTaskNotifyTake( pdTRUE, portMAX_DELAY );
}
/* Incremented to show the task is still running. */
ulNotifyCycleCount++;