示例#1
0
static void PIOS_Board_configure_com (const struct pios_usart_cfg *usart_port_cfg, size_t rx_buf_len, size_t tx_buf_len,
		const struct pios_com_driver *com_driver, uintptr_t *pios_com_id)
{
	uintptr_t pios_usart_id;
	if (PIOS_USART_Init(&pios_usart_id, usart_port_cfg)) {
		PIOS_Assert(0);
	}

	uint8_t * rx_buffer;
	if (rx_buf_len > 0) {
		rx_buffer = (uint8_t *) PIOS_malloc(rx_buf_len);
		PIOS_Assert(rx_buffer);
	} else {
		rx_buffer = NULL;
	}

	uint8_t * tx_buffer;
	if (tx_buf_len > 0) {
		tx_buffer = (uint8_t *) PIOS_malloc(tx_buf_len);
		PIOS_Assert(tx_buffer);
	} else {
		tx_buffer = NULL;
	}

	if (PIOS_COM_Init(pios_com_id, com_driver, pios_usart_id,
				rx_buffer, rx_buf_len,
				tx_buffer, tx_buf_len)) {
		PIOS_Assert(0);
	}
}
示例#2
0
文件: GPS.c 项目: EvalZero/TauLabs
/**
 * Initialise the gps module
 * \return -1 if initialisation failed
 * \return 0 on success
 */
int32_t GPSInitialize(void)
{
	gpsPort = PIOS_COM_GPS;
	uint8_t	gpsProtocol;

#ifdef MODULE_GPS_BUILTIN
	module_enabled = true;
#else
	uint8_t module_state[MODULESETTINGS_ADMINSTATE_NUMELEM];
	ModuleSettingsAdminStateGet(module_state);
	if (module_state[MODULESETTINGS_ADMINSTATE_GPS] == MODULESETTINGS_ADMINSTATE_ENABLED) {
		module_enabled = true;
	} else {
		module_enabled = false;
	}
#endif

	// These things are only conditional on small F1 targets.
	// Expected to be always present otherwise.
#ifdef SMALLF1
	if (gpsPort && module_enabled) {
#endif
		GPSPositionInitialize();
		GPSVelocityInitialize();
#if !defined(PIOS_GPS_MINIMAL)
		GPSTimeInitialize();
		GPSSatellitesInitialize();
		HomeLocationInitialize();
		UBloxInfoInitialize();
#endif
#if defined(PIOS_GPS_PROVIDES_AIRSPEED)
		AirspeedActualInitialize();
#endif
		updateSettings();
#ifdef SMALLF1
	}
#endif

	if (gpsPort && module_enabled) {
		ModuleSettingsGPSDataProtocolGet(&gpsProtocol);
		switch (gpsProtocol) {
			case MODULESETTINGS_GPSDATAPROTOCOL_NMEA:
				gps_rx_buffer = PIOS_malloc(NMEA_MAX_PACKET_LENGTH);
				break;
			case MODULESETTINGS_GPSDATAPROTOCOL_UBX:
				gps_rx_buffer = PIOS_malloc(sizeof(struct UBXPacket));
				break;
			default:
				gps_rx_buffer = NULL;
		}
		PIOS_Assert(gps_rx_buffer);

		return 0;
	}

	return -1;
}
示例#3
0
/**
 * @brief Allocate a new device
 */
static struct mpu6000_dev *PIOS_MPU6000_alloc(void)
{
	struct mpu6000_dev *mpu6000_dev;

	mpu6000_dev = (struct mpu6000_dev *)PIOS_malloc(sizeof(*mpu6000_dev));

	if (!mpu6000_dev) return (NULL);

	mpu6000_dev->magic = PIOS_MPU6000_DEV_MAGIC;

	mpu6000_dev->configured = false;

#if defined(PIOS_MPU6000_ACCEL)
	mpu6000_dev->accel_queue = PIOS_Queue_Create(PIOS_MPU6000_MAX_QUEUESIZE, sizeof(struct pios_sensor_accel_data));

	if (mpu6000_dev->accel_queue == NULL) {
		PIOS_free(mpu6000_dev);
		return NULL;
	}
#endif /* PIOS_MPU6000_ACCEL */

	mpu6000_dev->gyro_queue = PIOS_Queue_Create(PIOS_MPU6000_MAX_QUEUESIZE, sizeof(struct pios_sensor_gyro_data));

	if (mpu6000_dev->gyro_queue == NULL) {
		PIOS_free(mpu6000_dev);
		return NULL;
	}

	return mpu6000_dev;
}
示例#4
0
/**
 * @brief Allocate a new device
 */
static struct mpu6050_dev *PIOS_MPU6050_alloc(void)
{
	struct mpu6050_dev *mpu6050_dev;

	mpu6050_dev = (struct mpu6050_dev *)PIOS_malloc(sizeof(*mpu6050_dev));

	if (!mpu6050_dev) return (NULL);

	mpu6050_dev->magic = PIOS_MPU6050_DEV_MAGIC;

#if defined(PIOS_MPU6050_ACCEL)
	mpu6050_dev->accel_queue = xQueueCreate(PIOS_MPU6050_MAX_QUEUESIZE, sizeof(struct pios_sensor_accel_data));

	if (mpu6050_dev->accel_queue == NULL) {
		vPortFree(mpu6050_dev);
		return NULL;
	}
#endif /* PIOS_MPU6050_ACCEL */

	mpu6050_dev->gyro_queue = xQueueCreate(PIOS_MPU6050_MAX_QUEUESIZE, sizeof(struct pios_sensor_gyro_data));

	if (mpu6050_dev->gyro_queue == NULL) {
		vPortFree(mpu6050_dev);
		return NULL;
	}

	mpu6050_dev->data_ready_sema = xSemaphoreCreateMutex();

	if (mpu6050_dev->data_ready_sema == NULL) {
		vPortFree(mpu6050_dev);
		return NULL;
	}

	return mpu6050_dev;
}
示例#5
0
/**
 * @brief Initialise the module
 *
 * @return -1 if initialisation failed on success
 */
static int32_t RadioComBridgeInitialize(void)
{
	// allocate and initialize the static data storage only if module is enabled
	data =
	    (RadioComBridgeData *) PIOS_malloc(sizeof(RadioComBridgeData));
	if (!data) {
		return -1;
	}
	// Initialize the UAVObjects that we use
	RFM22BStatusInitialize();
	ObjectPersistenceInitialize();
	RFM22BReceiverInitialize();
	RadioComBridgeStatsInitialize();

	// Initialise UAVTalk
	data->telemUAVTalkCon = UAVTalkInitialize(&UAVTalkSendHandler);
	data->radioUAVTalkCon = UAVTalkInitialize(&RadioSendHandler);

	// Initialize the queues.
	data->uavtalkEventQueue = PIOS_Queue_Create(EVENT_QUEUE_SIZE, sizeof(UAVObjEvent));
	data->radioEventQueue = PIOS_Queue_Create(EVENT_QUEUE_SIZE, sizeof(UAVObjEvent));

	// Initialize the statistics.
	data->telemetryTxRetries = 0;
	data->radioTxRetries = 0;

	data->parseUAVTalk = true;

	return 0;
}
示例#6
0
/**
 * @brief Allocate a new device
 */
static struct l3gd20_dev *PIOS_L3GD20_alloc(void)
{
	struct l3gd20_dev *l3gd20_dev;

	l3gd20_dev = (struct l3gd20_dev *)PIOS_malloc(sizeof(*l3gd20_dev));

	if (!l3gd20_dev) return (NULL);

	l3gd20_dev->magic = PIOS_L3GD20_DEV_MAGIC;

	l3gd20_dev->configured = false;

	l3gd20_dev->queue = PIOS_Queue_Create(PIOS_L3GD20_QUEUESIZE, sizeof(struct pios_sensor_gyro_data));

	if (l3gd20_dev->queue == NULL) {
		PIOS_free(l3gd20_dev);
		return NULL;
	}

	l3gd20_dev->data_ready_sema = PIOS_Semaphore_Create();

	if (l3gd20_dev->data_ready_sema == NULL) {
		PIOS_free(l3gd20_dev);
		return NULL;
	}

	return l3gd20_dev;
}
示例#7
0
/**
 * Initialise the module
 * \return -1 if initialisation failed
 * \return 0 on success
 */
static int32_t uavoMavlinkBridgeInitialize(void) {
	mavlink_port = PIOS_COM_MAVLINK;

	uint8_t module_state[MODULESETTINGS_ADMINSTATE_NUMELEM];
	ModuleSettingsAdminStateGet(module_state);

	if (mavlink_port
			&& (module_state[MODULESETTINGS_ADMINSTATE_UAVOMAVLINKBRIDGE]
					== MODULESETTINGS_ADMINSTATE_ENABLED)) {
		updateSettings();

		mav_msg = PIOS_malloc(sizeof(*mav_msg));
		stream_ticks = PIOS_malloc_no_dma(MAXSTREAMS);

		if (mav_msg && stream_ticks) {
			for (int x = 0; x < MAXSTREAMS; ++x) {
				stream_ticks[x] = (TASK_RATE_HZ / mav_rates[x]);
			}

			module_enabled = true;
		}
	}

	return 0;
}
示例#8
0
/**
 * Initialise the telemetry module
 * \return -1 if initialisation failed
 * \return 0 on success
 */
int32_t OveroSyncStart(void)
{
	overosync = (struct overosync *) PIOS_malloc(sizeof(*overosync));
	if(overosync == NULL)
		return -1;

	overosync->buffer_lock = PIOS_Mutex_Create();
	if(overosync->buffer_lock == NULL)
		return -1;

	overosync->active_transaction_id = 0;
	overosync->loading_transaction_id = 0;
	overosync->write_pointer = 0;
	overosync->sent_bytes = 0;
	overosync->framesync_error = 0;

	// Process all registered objects and connect queue for updates
	UAVObjIterate(&registerObject);
	
	// Start telemetry tasks
	overoSyncTaskHandle = PIOS_Thread_Create(overoSyncTask, "OveroSync", STACK_SIZE_BYTES, NULL, TASK_PRIORITY);
	
	TaskMonitorAdd(TASKINFO_RUNNING_OVEROSYNC, overoSyncTaskHandle);
	
	return 0;
}
示例#9
0
/**
 * @brief Allocate a new device
 */
static struct mpu9150_dev * PIOS_MPU9150_alloc(void)
{
	struct mpu9150_dev * mpu9150_dev;
	
	mpu9150_dev = (struct mpu9150_dev *)PIOS_malloc(sizeof(*mpu9150_dev));
	if (!mpu9150_dev) return (NULL);
	
	mpu9150_dev->magic = PIOS_MPU9150_DEV_MAGIC;
	
	mpu9150_dev->accel_queue = PIOS_Queue_Create(PIOS_MPU9150_MAX_DOWNSAMPLE, sizeof(struct pios_sensor_gyro_data));
	if (mpu9150_dev->accel_queue == NULL) {
		PIOS_free(mpu9150_dev);
		return NULL;
	}

	mpu9150_dev->gyro_queue = PIOS_Queue_Create(PIOS_MPU9150_MAX_DOWNSAMPLE, sizeof(struct pios_sensor_gyro_data));
	if (mpu9150_dev->gyro_queue == NULL) {
		PIOS_free(mpu9150_dev);
		return NULL;
	}

	mpu9150_dev->mag_queue = PIOS_Queue_Create(PIOS_MPU9150_MAX_DOWNSAMPLE, sizeof(struct pios_sensor_mag_data));
	if (mpu9150_dev->mag_queue == NULL) {
		PIOS_free(mpu9150_dev);
		return NULL;
	}

	mpu9150_dev->data_ready_sema = PIOS_Semaphore_Create();
	if (mpu9150_dev->data_ready_sema == NULL) {
		PIOS_free(mpu9150_dev);
		return NULL;
	}

	return mpu9150_dev;
}
示例#10
0
/**
 * Initialise the module, called on startup
 * \returns 0 on success or -1 if initialisation failed
 */
int32_t GeofenceInitialize(void)
{
	bool module_enabled = false;

#ifdef MODULE_Geofence_BUILTIN
	module_enabled = true;
#else
	uint8_t module_state[MODULESETTINGS_ADMINSTATE_NUMELEM];
	ModuleSettingsAdminStateGet(module_state);
	if (module_state[MODULESETTINGS_ADMINSTATE_GEOFENCE] == MODULESETTINGS_ADMINSTATE_ENABLED) {
		module_enabled = true;
	} else {
		module_enabled = false;
	}
#endif

	if (module_enabled) {

		GeoFenceSettingsInitialize();

		// allocate and initialize the static data storage only if module is enabled
		geofenceSettings = (GeoFenceSettingsData *) PIOS_malloc(sizeof(GeoFenceSettingsData));
		if (geofenceSettings == NULL) {
			module_enabled = false;
			return -1;
		}

		GeoFenceSettingsConnectCallback(settingsUpdated);
		settingsUpdated(NULL, NULL, NULL, 0);

		return 0;
	}

	return -1;
}
示例#11
0
文件: pios_usb.c 项目: 1heinz/TauLabs
static struct pios_usb_dev * PIOS_USB_alloc(void)
{
	struct pios_usb_dev * usb_dev;

	usb_dev = (struct pios_usb_dev *)PIOS_malloc(sizeof(*usb_dev));
	if (!usb_dev) return(NULL);

	usb_dev->magic = PIOS_USB_DEV_MAGIC;
	return(usb_dev);
}
示例#12
0
文件: pios_pwm.c 项目: 1heinz/TauLabs
static struct pios_pwm_dev * PIOS_PWM_alloc(void)
{
	struct pios_pwm_dev * pwm_dev;

	pwm_dev = (struct pios_pwm_dev *)PIOS_malloc(sizeof(*pwm_dev));
	if (!pwm_dev) return(NULL);

	pwm_dev->magic = PIOS_PWM_DEV_MAGIC;
	return(pwm_dev);
}
示例#13
0
static struct pios_rcvr_dev * PIOS_RCVR_alloc(void)
{
  struct pios_rcvr_dev * rcvr_dev;

  rcvr_dev = (struct pios_rcvr_dev *)PIOS_malloc(sizeof(*rcvr_dev));
  if (!rcvr_dev) return (NULL);

  rcvr_dev->magic = PIOS_RCVR_DEV_MAGIC;
  return(rcvr_dev);
}
示例#14
0
static struct pios_hsum_dev *PIOS_HSUM_Alloc(void)
{
	struct pios_hsum_dev *hsum_dev;

	hsum_dev = (struct pios_hsum_dev *)PIOS_malloc(sizeof(*hsum_dev));
	if (!hsum_dev)
		return NULL;

	hsum_dev->magic = PIOS_HSUM_DEV_MAGIC;
	return hsum_dev;
}
示例#15
0
static struct pios_internal_flash_dev *PIOS_Flash_Internal_alloc(void)
{
	struct pios_internal_flash_dev *flash_dev;

	flash_dev = (struct pios_internal_flash_dev *)PIOS_malloc(sizeof(*flash_dev));
	if (!flash_dev) return (NULL);

	flash_dev->magic = PIOS_INTERNAL_FLASH_DEV_MAGIC;

	return(flash_dev);
}
示例#16
0
/**
 *
 * @brief   Creates a non recursive mutex.
 *
 * @returns instance of @p struct pios_mutex or NULL on failure
 *
 */
struct pios_mutex *PIOS_Mutex_Create(void)
{
	struct pios_mutex *mtx = PIOS_malloc(sizeof(struct pios_mutex));

	if (mtx == NULL)
		return NULL;

	mtx->mtx_handle = (uintptr_t)xSemaphoreCreateMutex();

	return mtx;
}
示例#17
0
/**
 *
 * @brief   Creates a non recursive mutex.
 *
 * @returns instance of @p struct pios_mutex or NULL on failure
 *
 */
struct pios_mutex *PIOS_Mutex_Create(void)
{
	struct pios_mutex *mtx = PIOS_malloc(sizeof(struct pios_mutex));

	if (mtx == NULL)
		return NULL;

	chMtxInit(&mtx->mtx);

	return mtx;
}
示例#18
0
static struct pios_usart_dev * PIOS_USART_alloc(void)
{
	struct pios_usart_dev * usart_dev;

	usart_dev = (struct pios_usart_dev *)PIOS_malloc(sizeof(*usart_dev));
	if (!usart_dev) return(NULL);

	memset(usart_dev, 0, sizeof(*usart_dev));
	usart_dev->magic = PIOS_USART_DEV_MAGIC;
	return(usart_dev);
}
示例#19
0
/**
 *
 * @brief   Creates a recursive mutex.
 *
 * @returns instance of @p struct pios_recursive mutex or NULL on failure
 *
 */
struct pios_recursive_mutex *PIOS_Recursive_Mutex_Create(void)
{
	struct pios_recursive_mutex *mtx = PIOS_malloc(sizeof(struct pios_recursive_mutex));

	if (mtx == NULL)
		return NULL;

	chMtxInit(&mtx->mtx);
	mtx->count = 0;

	return mtx;
}
示例#20
0
/**
 * @brief Allocate a new device
 */
static struct bma180_dev * PIOS_BMA180_alloc(void)
{
    struct bma180_dev * bma180_dev;

    bma180_dev = (struct bma180_dev *)PIOS_malloc(sizeof(*bma180_dev));
    if (!bma180_dev) return (NULL);

    fifoBuf_init(&bma180_dev->fifo, (uint8_t *) bma180_dev->buffer, sizeof(bma180_dev->buffer));

    bma180_dev->magic = PIOS_BMA180_DEV_MAGIC;
    return(bma180_dev);
}
示例#21
0
static struct pios_can_dev *PIOS_CAN_alloc(void)
{
	struct pios_can_dev *can_dev;

	can_dev = (struct pios_can_dev *)PIOS_malloc(sizeof(*can_dev));
	if (!can_dev) return(NULL);

	memset(can_dev, 0, sizeof(*can_dev));
	can_dev->magic = PIOS_CAN_DEV_MAGIC;

	return(can_dev);
}
示例#22
0
/**
 *
 * @brief   Creates a queue.
 *
 * @returns instance of @p struct pios_queue or NULL on failure
 *
 */
struct pios_queue *PIOS_Queue_Create(size_t queue_length, size_t item_size)
{
	struct pios_queue *queuep = PIOS_malloc(sizeof(struct pios_queue));
	if (queuep == NULL)
		return NULL;

	/* Create the memory pool. */
	queuep->mpb = PIOS_malloc(item_size * (queue_length + PIOS_QUEUE_MAX_WAITERS));
	if (queuep->mpb == NULL) {
		PIOS_free(queuep);
		return NULL;
	}
	chPoolInit(&queuep->mp, item_size, NULL);
	chPoolLoadArray(&queuep->mp, queuep->mpb, queue_length + PIOS_QUEUE_MAX_WAITERS);

	/* Create the mailbox. */
	msg_t *mb_buf = PIOS_malloc(sizeof(msg_t) * queue_length);
	chMBInit(&queuep->mb, mb_buf, queue_length);

	return queuep;
}
示例#23
0
文件: uavtalk.c 项目: Trex4Git/dRonin
/**
 * Initialize the UAVTalk library
 * \param[in] connection UAVTalkConnection to be used
 * \param[in] outputStream Function pointer that is called to send a data buffer
 * \return 0 Success
 * \return -1 Failure
 */
UAVTalkConnection UAVTalkInitialize(UAVTalkOutputStream outputStream)
{
	// allocate object
	UAVTalkConnectionData * connection = PIOS_malloc_no_dma(sizeof(UAVTalkConnectionData));
	if (!connection) return 0;
	connection->canari = UAVTALK_CANARI;
	connection->iproc.rxPacketLength = 0;
	connection->iproc.state = UAVTALK_STATE_SYNC;
	connection->outStream = outputStream;
	connection->lock = PIOS_Recursive_Mutex_Create();
	PIOS_Assert(connection->lock != NULL);
	connection->transLock = PIOS_Recursive_Mutex_Create();
	PIOS_Assert(connection->transLock != NULL);
	// allocate buffers
	connection->rxBuffer = PIOS_malloc(UAVTALK_MAX_PACKET_LENGTH);
	if (!connection->rxBuffer) return 0;
	connection->txBuffer = PIOS_malloc(UAVTALK_MAX_PACKET_LENGTH);
	if (!connection->txBuffer) return 0;
	connection->respSema = PIOS_Semaphore_Create();
	PIOS_Semaphore_Take(connection->respSema, 0); // reset to zero
	UAVTalkResetStats( (UAVTalkConnection) connection );
	return (UAVTalkConnection) connection;
}
示例#24
0
/**
 * ChibiOS stack expects alignment (both start and end)
 * to 8 byte boundaries. This makes sure to allocate enough
 * memory and return an address that has the requested size
 * or more with these constraints.
 */
static uint8_t * align8_alloc(uint32_t size)
{
	// round size up to at nearest multiple of 8 + 4 bytes to guarantee
	// sufficient size within. This is because PIOS_malloc only guarantees
	// uintptr_t alignment which is 4 bytes.
	size = size + sizeof(uintptr_t);
	uint8_t *wap = PIOS_malloc(size);

	// shift start point to nearest 8 byte boundary.
	uint32_t pad = ((uint32_t) wap) % sizeof(stkalign_t);
	wap = wap + pad;

	return wap;
}
示例#25
0
/**
  * @brief Allocates an internal ADC device in memory
  * \param[out] pointer to the newly created device
  *
  */
static struct pios_internal_adc_dev * PIOS_INTERNAL_ADC_Allocate()
{
	if(static_adc_dev)
		return NULL;
	struct pios_internal_adc_dev * adc_dev;
	
	adc_dev = (struct pios_internal_adc_dev *)PIOS_malloc(sizeof(*adc_dev));
	if (!adc_dev) return (NULL);
	
	adc_dev->magic = PIOS_INTERNAL_ADC_DEV_MAGIC;

	static_adc_dev = adc_dev;

	return(adc_dev);
}
示例#26
0
int sin_lookup_initialize()
{
	// Previously initialized
	if (sin_table)
		return 0;

	sin_table = (float *) PIOS_malloc(sizeof(float) * SIN_RESOLUTION);
	if (sin_table == NULL)
		return -1;

	for(uint32_t i = 0; i < 180; i++)
		sin_table[i] = sinf((float)i * DEG2RAD);

	return 0;
}
示例#27
0
static struct pios_gcsrcvr_dev *PIOS_gcsrcvr_alloc(void)
{
	struct pios_gcsrcvr_dev * gcsrcvr_dev;

	gcsrcvr_dev = (struct pios_gcsrcvr_dev *)PIOS_malloc(sizeof(*gcsrcvr_dev));
	if (!gcsrcvr_dev) return(NULL);

	gcsrcvr_dev->magic = PIOS_GCSRCVR_DEV_MAGIC;
	gcsrcvr_dev->Fresh = false;
	gcsrcvr_dev->supv_timer = 0;

	/* The update callback cannot receive the device pointer, so set it in a global */
	global_gcsrcvr_dev = gcsrcvr_dev;

	return(gcsrcvr_dev);
}
示例#28
0
static struct pios_rfm22b_rcvr_dev *PIOS_RFM22B_Rcvr_alloc(void)
{
	struct pios_rfm22b_rcvr_dev *rfm22b_rcvr_dev;

	rfm22b_rcvr_dev =
	    (struct pios_rfm22b_rcvr_dev *)
	    PIOS_malloc(sizeof(*rfm22b_rcvr_dev));
	if (!rfm22b_rcvr_dev) {
		return NULL;
	}

	rfm22b_rcvr_dev->magic = PIOS_RFM22B_RCVR_DEV_MAGIC;
	rfm22b_rcvr_dev->fresh = false;
	rfm22b_rcvr_dev->supv_timer = 0;

	return rfm22b_rcvr_dev;
}
示例#29
0
/**
 * @brief Allocate a new device
 */
static struct hmc5883_dev * PIOS_HMC5883_alloc(void)
{
	struct hmc5883_dev *hmc5883_dev;
	
	hmc5883_dev = (struct hmc5883_dev *)PIOS_malloc(sizeof(*hmc5883_dev));
	if (!hmc5883_dev) return (NULL);
	
	hmc5883_dev->magic = PIOS_HMC5883_DEV_MAGIC;
	
	hmc5883_dev->queue = PIOS_Queue_Create(PIOS_HMC5883_MAX_DOWNSAMPLE, sizeof(struct pios_sensor_mag_data));
	if (hmc5883_dev->queue == NULL) {
		PIOS_free(hmc5883_dev);
		return NULL;
	}

	return hmc5883_dev;
}
示例#30
0
/**
 *
 * @brief   Creates a queue.
 *
 * @returns instance of @p struct pios_queue or NULL on failure
 *
 */
struct pios_queue *PIOS_Queue_Create(size_t queue_length, size_t item_size)
{
	struct pios_queue *queuep = PIOS_malloc(sizeof(struct pios_queue));

	if (queuep == NULL)
		return NULL;

	queuep->queue_handle = (uintptr_t)NULL;

	if ((queuep->queue_handle = (uintptr_t)xQueueCreate(queue_length, item_size)) == (uintptr_t)NULL)
	{
		PIOS_free(queuep);
		return NULL;
	}

	return queuep;
}