xQueueOverwrite macro

void vFunction( void *pvParameters ) { QueueHandle_t xQueue; uint32_t ulVarToSend, ulValReceived; // Create a queue to hold one uint32_t value. It is strongly // recommended *not* to use xQueueOverwrite() on queues that can // contain more than one value, and doing so will trigger an assertion // if configASSERT() is defined. xQueue = xQueueCreate( 1, sizeof( uint32_t ) ); // Write the value 10 to the queue using xQueueOverwrite(). ulVarToSend = 10; xQueueOverwrite( xQueue, &ulVarToSend ); // Peeking the queue should now return 10, but leave the value 10 in // the queue. A block time of zero is used as it is known that the // queue holds a value. ulValReceived = 0; xQueuePeek( xQueue, &ulValReceived, 0 ); if( ulValReceived != 10 ) { // Error unless the item was removed by a different task. } // The queue is still full. Use xQueueOverwrite() to overwrite the // value held in the queue with 100. ulVarToSend = 100; xQueueOverwrite( xQueue, &ulVarToSend ); // This time read from the queue, leaving the queue empty once more. // A block time of 0 is used again. xQueueReceive( xQueue, &ulValReceived, 0 ); // The value read should be the last value written, even though the // queue was already full when the value was written. if( ulValReceived != 100 ) { // Error! } // ... }