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Kernel changes:
- Remove an assert that was preventing xQueueSendFromISR() being used to give a mutex from an ISR (mutexes cannot be given using xSemaphoreGiveFromISR()).
- Introduce xTaskNotifyAndQueryFromISR() as the interrupt safe version of xTaskNotifyAndQuery().

Common demo task changes:
- Update IntSemTest.c to prove the theory that it is safe to give a mutex type semaphore from an interrupt using xQueueSendFromISR() instead of xSemaphoreGiveFromISR().
- Update TaskNotify.c to test the new xTaskNotifyAndQuery() from ISR fuction.
This commit is contained in:
Richard Barry 2015-08-01 07:03:32 +00:00
parent 25b911e0bd
commit 4c3722bd76
6 changed files with 129 additions and 62 deletions
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27
FreeRTOS/Demo/Common/Minimal/TaskNotify.c
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@ -472,8 +472,10 @@ TickType_t xPeriod;
void xNotifyTaskFromISR( void )
{
static BaseType_t xCallCount = 0;
static BaseType_t xCallCount = 0, xAPIToUse = 0;
const BaseType_t xCallInterval = pdMS_TO_TICKS( 50 );
uint32_t ulPreviousValue;
const uint32_t ulUnexpectedValue = 0xff;
/* The task performs some tests before starting the timer that gives the
notification from this interrupt. If the timer has not been created yet
@ -488,7 +490,28 @@ const BaseType_t xCallInterval = pdMS_TO_TICKS( 50 );
/* It is time to 'give' the notification again. */
xCallCount = 0;
vTaskNotifyGiveFromISR( xTaskToNotify, NULL );
/* Test using both vTaskNotifyGiveFromISR(), xTaskNotifyFromISR()
and xTaskNotifyAndQueryFromISR(). */
switch( xAPIToUse )
{
case 0: vTaskNotifyGiveFromISR( xTaskToNotify, NULL );
xAPIToUse++;
break;
case 1: xTaskNotifyFromISR( xTaskToNotify, 0, eIncrement, NULL );
xAPIToUse++;
break;
case 2: ulPreviousValue = ulUnexpectedValue;
xTaskNotifyAndQueryFromISR( xTaskToNotify, 0, eIncrement, &ulPreviousValue, NULL );
configASSERT( ulPreviousValue != ulUnexpectedValue );
xAPIToUse = 0;
break;
default:/* Should never get here!. */
break;
}
ulTimerNotificationsSent++;
}
}