imt_queue.h File Reference

#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>

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Classes
struct	imt_t
	Represents a single message in the queue. More...
struct	imt_queue_t
	Circular buffer structure to hold queued messages. More...

Macros
#define	IMT_QUEUE_SIZE   1U
	Number of messages allowed in the internal message queue.
#define	IMT_CRC_SIZE   2U
	Number of bytes reserved for CRC at the end of the payload.
#define	IMT_PAYLOAD_SIZE   100000U + IMT_CRC_SIZE
	Maximum payload size of a single message with the CRC added on.

Functions
bool	imtQueueMoAdd (const uint16_t topic, const char *data, const size_t length)
	Add an outgoing mobile-originated (MO) message to the queue.
bool	imtQueueMtAdd (const uint16_t topic, const uint16_t id, const size_t length)
	Add an incoming mobile-terminated (MT) message to the queue.
bool	imtQueueMoRemove (void)
	Remove an outgoing mobile-originated (MO) message from the queue.
bool	imtQueueMtRemove (void)
	Remove an outgoing mobile-terminated (MT) message from the queue.
imt_t *	imtQueueMoGetFirst (void)
	Get the address of the head of the MO queue.
imt_t *	imtQueueMtGetFirst (void)
	Get the address of the head of the MT queue.
imt_t *	imtQueueMtGetLast (void)
	Get the address of the latest message in the MT queue.
void	imtQueueMtLock (bool lock)
	Lock or unlock the MT queue to prevent messages from getting discarded if full.
void	imtQueueInit (void)
	Used to initialise both outgoing and incoming queues.
size_t	imtQueueSize (imt_queue_t *queue)
	Inline function used to get the current size of the selected queue.

Macro Definition Documentation

IMT_CRC_SIZE

#define IMT_CRC_SIZE   2U

Number of bytes reserved for CRC at the end of the payload.

IMT_PAYLOAD_SIZE

#define IMT_PAYLOAD_SIZE   100000U + IMT_CRC_SIZE

Maximum payload size of a single message with the CRC added on.

IMT_QUEUE_SIZE

#define IMT_QUEUE_SIZE   1U

Number of messages allowed in the internal message queue.

Function Documentation

imtQueueInit()

void imtQueueInit

(

void

)

Used to initialise both outgoing and incoming queues.

imtQueueMoAdd()

bool imtQueueMoAdd	(	const uint16_t	topic,
		const char *	data,
		const size_t	length
	)

Add an outgoing mobile-originated (MO) message to the queue.

Parameters

topic	Message topic ID.
data	Pointer to the message payload.
length	Message payload length in bytes.

Returns

Bool indicating success or failure to add the message to the queue.

imtQueueMoGetFirst()

imt_t * imtQueueMoGetFirst

(

void

)

Get the address of the head of the MO queue.

Returns

Pointer to the next message in the queue, NULL if queue is empty.

imtQueueMoRemove()

bool imtQueueMoRemove

(

void

)

Remove an outgoing mobile-originated (MO) message from the queue.

Returns

Bool indicating success or failure to remove the message from the queue.

imtQueueMtAdd()

bool imtQueueMtAdd	(	const uint16_t	topic,
		const uint16_t	id,
		const size_t	length
	)

Add an incoming mobile-terminated (MT) message to the queue.

Parameters

topic	Message topic ID.
id	Unique identifier of the message assigned by the modem.
length	Message payload length in bytes.

Returns

Bool indicating success or failure to add the message to the queue.

imtQueueMtGetFirst()

imt_t * imtQueueMtGetFirst

(

void

)

Get the address of the head of the MT queue.

Returns

Pointer to the next message in the queue, NULL if queue is empty.

imtQueueMtGetLast()

imt_t * imtQueueMtGetLast

(

void

)

Get the address of the latest message in the MT queue.

Returns

Pointer to the last message in the queue, NULL if queue is empty.

imtQueueMtLock()

void imtQueueMtLock

(

bool

lock

)

Lock or unlock the MT queue to prevent messages from getting discarded if full.

Parameters

lock	Called with true to lock the queue and false to unlock the queue.

Note

This is set to false by default.

imtQueueMtRemove()

bool imtQueueMtRemove

(

void

)

Remove an outgoing mobile-terminated (MT) message from the queue.

Returns

Bool indicating success or failure to remove the message from the queue.

imtQueueSize()

size_t imtQueueSize ( imt_queue_t *  queue )

inline

Inline function used to get the current size of the selected queue.

Parameters

queue

Pointer to the selected queue.

Returns

size_t of the current queue size.