detoxie wrote on Sunday, February 01, 2015:
Does this happen the first time you call ulTaskNotifyTake()…
No, it happens the second time because the first time I got the semaphore and the macro isn’t executed. So, the abort happens the FIRST time the MACRO is executed.
Does the abort happen on one of the lines in the macro…
I will test this on tuesday when I come to the office.
Meanwhile, here is the code:
ISR
#!cpp
#define USE_NOTIFICATION 0
#if ( USE_NOTIFICATION == 1 )
extern TaskHandle_t xSPIUARTTask;
#endif
void gioHighLevelInterrupt(void)
{
#if ( USE_NOTIFICATION == 0 )
static ISR_INT6_SPI_UART_GotInt_Queue gotintqueue6;
#endif
static BaseType_t xHigherPriorityTaskWoken;
/* Loop until all interrupts are processed */
do
{
offset = gioREG->OFF1;
switch (offset - 1U)
{
/*
* SPI-UART interrupt input (GPIOA(6))
*/
case 6U:
#if ( USE_NOTIFICATION == 0 )
gotintqueue6.gotInt = true;
(void) xQueueOverwriteFromISR( xISR_INT6_SPI_UART_GotInt_Queue, &gotintqueue6, &xHigherPriorityTaskWoken );
#else
vTaskNotifyGiveFromISR( xSPIUARTTask, &xHigherPriorityTaskWoken );
#endif
portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
break;
default:
break;
}
} while (offset != 0U);
}
Task
#!cpp
#define USE_NOTIFICATION 0
void vSPIUARTTask( void *pvParameters )
{
for( ;; )
{
#if ( USE_NOTIFICATION == 0 )
if ((xQueueReceive( xISR_INT6_SPI_UART_GotInt_Queue, &spiuartQueue, portMAX_DELAY)
== pdTRUE) && (spiuartQueue.gotInt == true))
#else
if (ulTaskNotifyTake( pdTRUE, portMAX_DELAY ) == pdTRUE)
#endif
{
code...
}
code...
}
}
The xQueueReceive works but not ulTaskNotifyTake. When I get the first interrupt, ulTaskNotifyTake returns pdTRUE but when ulTaskNotifyTake is called again (and the macro executes), I get the abort exception.
I might very well have messed up it in some other area of the code (which I may have missed when did the copy [and also did comparisons afterwards]) but it’s a bit strange that xQueueReceive works but not ulTaskNotifyTake. 
I get back to you when I have stepped through the macro.
Kind regards,
Lars
