Hearing Access Service (HAS) More...

Data Structures
struct	bt_has_features_param
	Structure for registering features of a Hearing Access Service instance. More...

struct	bt_has_preset_record
	Preset record definition. More...

struct	bt_has_client_cb
	Hearing Access Service Client callback structure. More...

struct	bt_has_preset_ops
	Preset operations structure. More...

struct	bt_has_preset_register_param
	Register structure for preset. More...

Macros
#define	BT_HAS_PRESET_NAME_MIN 1
	Preset name minimum length.

#define	BT_HAS_PRESET_NAME_MAX 40
	Preset name maximum length.

Typedefs
typedef uint8_t(*	bt_has_preset_func_t) (uint8_t index, enum bt_has_properties properties, const char name, void user_data)
	Preset iterator callback.

Enumerations
enum	bt_has_hearing_aid_type { BT_HAS_HEARING_AID_TYPE_BINAURAL = 0x00 , BT_HAS_HEARING_AID_TYPE_MONAURAL = 0x01 , BT_HAS_HEARING_AID_TYPE_BANDED = 0x02 }
	Hearing Aid device type. More...

enum	bt_has_properties { BT_HAS_PROP_NONE = 0 , BT_HAS_PROP_WRITABLE = BIT(0) , BT_HAS_PROP_AVAILABLE = BIT(1) }
	Preset Properties values. More...

enum	bt_has_capabilities { BT_HAS_PRESET_SUPPORT = BIT(0) }
	Hearing Aid device capabilities. More...

enum	{ BT_HAS_PRESET_ITER_STOP = 0 , BT_HAS_PRESET_ITER_CONTINUE }
	Enum for return values for bt_has_preset_func_t functions. More...

Functions
int	bt_has_client_cb_register (const struct bt_has_client_cb *cb)
	Registers the callbacks used by the Hearing Access Service client.

int	bt_has_client_discover (struct bt_conn *conn)
	Discover Hearing Access Service on a remote device.

int	bt_has_client_conn_get (const struct bt_has has, struct bt_conn *conn)
	Get the Bluetooth connection object of the service object.

int	bt_has_client_presets_read (struct bt_has *has, uint8_t index, uint8_t max_count)
	Read Preset Records.

int	bt_has_client_preset_set (struct bt_has *has, uint8_t index, bool sync)
	Set Active Preset.

int	bt_has_client_preset_next (struct bt_has *has, bool sync)
	Activate Next Preset.

int	bt_has_client_preset_prev (struct bt_has *has, bool sync)
	Activate Previous Preset.

int	bt_has_register (const struct bt_has_features_param *features)
	Register the Hearing Access Service instance.

int	bt_has_preset_register (const struct bt_has_preset_register_param *param)
	Register preset.

int	bt_has_preset_unregister (uint8_t index)
	Unregister Preset.

int	bt_has_preset_available (uint8_t index)
	Set the preset as available.

int	bt_has_preset_unavailable (uint8_t index)
	Set the preset as unavailable.

void	bt_has_preset_foreach (uint8_t index, bt_has_preset_func_t func, void *user_data)
	Preset iterator.

int	bt_has_preset_active_set (uint8_t index)
	Set active preset.

uint8_t	bt_has_preset_active_get (void)
	Get active preset.

static int	bt_has_preset_active_clear (void)
	Clear out active preset.

int	bt_has_preset_name_change (uint8_t index, const char *name)
	Change the Preset Name.

int	bt_has_features_set (const struct bt_has_features_param *features)
	Change the Hearing Aid Features.

Preset index definitions
#define	BT_HAS_PRESET_INDEX_NONE 0x00
	No index.

#define	BT_HAS_PRESET_INDEX_FIRST 0x01
	First preset index.

#define	BT_HAS_PRESET_INDEX_LAST 0xFF
	Last preset index.

Detailed Description

Hearing Access Service (HAS)

Since: 3.1

Version: 0.8.0

The Hearing Access Service is used to identify a hearing aid and optionally to control hearing aid presets.

Macro Definition Documentation

◆ BT_HAS_PRESET_INDEX_FIRST

#define BT_HAS_PRESET_INDEX_FIRST 0x01

#include <zephyr/bluetooth/audio/has.h>

First preset index.

◆ BT_HAS_PRESET_INDEX_LAST

#define BT_HAS_PRESET_INDEX_LAST 0xFF

#include <zephyr/bluetooth/audio/has.h>

Last preset index.

◆ BT_HAS_PRESET_INDEX_NONE

#define BT_HAS_PRESET_INDEX_NONE 0x00

#include <zephyr/bluetooth/audio/has.h>

No index.

◆ BT_HAS_PRESET_NAME_MAX

#define BT_HAS_PRESET_NAME_MAX 40

#include <zephyr/bluetooth/audio/has.h>

Preset name maximum length.

◆ BT_HAS_PRESET_NAME_MIN

#define BT_HAS_PRESET_NAME_MIN 1

#include <zephyr/bluetooth/audio/has.h>

Preset name minimum length.

Typedef Documentation

◆ bt_has_preset_func_t

typedef uint8_t(* bt_has_preset_func_t) (uint8_t index, enum bt_has_properties properties, const char *name, void *user_data)

#include <zephyr/bluetooth/audio/has.h>

Preset iterator callback.

Parameters

index	The index of preset found.
properties	Preset properties.
name	Preset name.
user_data	Data given.

Returns: BT_HAS_PRESET_ITER_CONTINUE if should continue to the next preset.; BT_HAS_PRESET_ITER_STOP to stop.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

#include <zephyr/bluetooth/audio/has.h>

Enum for return values for bt_has_preset_func_t functions.

Enumerator
BT_HAS_PRESET_ITER_STOP	Stop iterating.
BT_HAS_PRESET_ITER_CONTINUE	Continue iterating.

◆ bt_has_capabilities

enum bt_has_capabilities

#include <zephyr/bluetooth/audio/has.h>

Hearing Aid device capabilities.

Enumerator
BT_HAS_PRESET_SUPPORT	Indicate support for presets.

◆ bt_has_hearing_aid_type

enum bt_has_hearing_aid_type

#include <zephyr/bluetooth/audio/has.h>

Hearing Aid device type.

Enumerator

BT_HAS_HEARING_AID_TYPE_BINAURAL

Two hearing aids that form a Coordinated Set, one for the right ear and one for the left ear of the user.

Typically used by a user with bilateral hearing loss.

BT_HAS_HEARING_AID_TYPE_MONAURAL

A single hearing aid for the left or the right ear.

Typically used by a user with unilateral hearing loss.

BT_HAS_HEARING_AID_TYPE_BANDED

Two hearing aids with a connection to one another that expose a single Bluetooth radio interface.

◆ bt_has_properties

enum bt_has_properties

#include <zephyr/bluetooth/audio/has.h>

Preset Properties values.

Enumerator
BT_HAS_PROP_NONE	No properties set.
BT_HAS_PROP_WRITABLE	Preset name can be written by the client.
BT_HAS_PROP_AVAILABLE	Preset availability.

Function Documentation

◆ bt_has_client_cb_register()

int bt_has_client_cb_register ( const struct bt_has_client_cb * cb )

#include <zephyr/bluetooth/audio/has.h>

Registers the callbacks used by the Hearing Access Service client.

Parameters

cb	The callback structure.

Returns: 0 in case of success or negative value in case of error.

◆ bt_has_client_conn_get()

int bt_has_client_conn_get	(	const struct bt_has *	has,
		struct bt_conn **	conn )

#include <zephyr/bluetooth/audio/has.h>

Get the Bluetooth connection object of the service object.

The caller gets a new reference to the connection object which must be released with bt_conn_unref() once done using the object.

Parameters

[in]	has	Pointer to the Hearing Access Service object.
[out]	conn	Connection object.

Returns: 0 in case of success or negative value in case of error.

◆ bt_has_client_discover()

int bt_has_client_discover ( struct bt_conn * conn )

#include <zephyr/bluetooth/audio/has.h>

Discover Hearing Access Service on a remote device.

Client method to find a Hearing Access Service on a server identified by conn. The bt_has_client_cb::discover callback will be called when the discovery procedure is complete to provide user a Hearing Access Service (HAS) object.

Parameters

conn	Bluetooth connection object.

Returns: 0 if success, errno on failure.

◆ bt_has_client_preset_next()

int bt_has_client_preset_next	(	struct bt_has *	has,
		bool	sync )

#include <zephyr/bluetooth/audio/has.h>

Activate Next Preset.

Client procedure to set next available preset as active. The status is returned in the bt_has_client_cb::preset_switch callback.

Parameters

has	Pointer to the Hearing Access Service object.
sync	Request active preset synchronization in set.

Returns: 0 in case of success or negative value in case of error.

◆ bt_has_client_preset_prev()

int bt_has_client_preset_prev	(	struct bt_has *	has,
		bool	sync )

#include <zephyr/bluetooth/audio/has.h>

Activate Previous Preset.

Client procedure to set previous available preset as active. The status is returned in the bt_has_client_cb::preset_switch callback.

Parameters

has	Pointer to the Hearing Access Service object.
sync	Request active preset synchronization in set.

Returns: 0 in case of success or negative value in case of error.

◆ bt_has_client_preset_set()

int bt_has_client_preset_set	(	struct bt_has *	has,
		uint8_t	index,
		bool	sync )

#include <zephyr/bluetooth/audio/has.h>

Set Active Preset.

Client procedure to set preset identified by index as active. The status is returned in the bt_has_client_cb::preset_switch callback.

Parameters

has	Pointer to the Hearing Access Service object.
index	Preset index to activate.
sync	Request active preset synchronization in set.

Returns: 0 in case of success or negative value in case of error.

◆ bt_has_client_presets_read()

int bt_has_client_presets_read	(	struct bt_has *	has,
		uint8_t	index,
		uint8_t	max_count )

#include <zephyr/bluetooth/audio/has.h>

Read Preset Records.

Client method to read up to max_count presets starting from given index. The preset records are returned in the bt_has_client_cb::preset_read_rsp callback (called once for each preset).

Parameters

has	Pointer to the Hearing Access Service object.
index	The index to start with.
max_count	Maximum number of presets to read.

Returns: 0 in case of success or negative value in case of error.

◆ bt_has_features_set()

int bt_has_features_set ( const struct bt_has_features_param * features )

#include <zephyr/bluetooth/audio/has.h>

Change the Hearing Aid Features.

Change the hearing aid features.

Parameters

features The features to be set.

Returns: 0 in case of success or negative value in case of error.

◆ bt_has_preset_active_clear()

static int bt_has_preset_active_clear ( void )

inlinestatic

#include <zephyr/bluetooth/audio/has.h>

Clear out active preset.

Used by server to deactivate currently active preset.

Returns: 0 in case of success or negative value in case of error.

◆ bt_has_preset_active_get()

uint8_t bt_has_preset_active_get ( void )

#include <zephyr/bluetooth/audio/has.h>

Get active preset.

Function used to get the currently active preset index.

Returns: Active preset index.

◆ bt_has_preset_active_set()

int bt_has_preset_active_set ( uint8_t index )

#include <zephyr/bluetooth/audio/has.h>

Set active preset.

Function used to set the preset identified by the index as the active preset. The preset index will be notified to peer devices.

Parameters

index Preset index.

Returns: 0 in case of success or negative value in case of error.

◆ bt_has_preset_available()

int bt_has_preset_available ( uint8_t index )

#include <zephyr/bluetooth/audio/has.h>

Set the preset as available.

Set the BT_HAS_PROP_AVAILABLE property bit. This will notify preset availability to peer devices. Only available preset can be selected as active preset.

Parameters

index The index of preset that's became available.

Returns: 0 in case of success or negative value in case of error.

◆ bt_has_preset_foreach()

void bt_has_preset_foreach	(	uint8_t	index,
		bt_has_preset_func_t	func,
		void *	user_data )

#include <zephyr/bluetooth/audio/has.h>

Preset iterator.

Iterate presets. Optionally, match non-zero index if given.

Parameters

index	Preset index, passing BT_HAS_PRESET_INDEX_NONE skips index matching.
func	Callback function.
user_data	Data to pass to the callback.

◆ bt_has_preset_name_change()

int bt_has_preset_name_change	(	uint8_t	index,
		const char *	name )

#include <zephyr/bluetooth/audio/has.h>

Change the Preset Name.

Change the name of the preset identified by index.

Parameters

index	The index of the preset to change the name of.
name	Name to write.

Returns: 0 in case of success or negative value in case of error.

◆ bt_has_preset_register()

int bt_has_preset_register ( const struct bt_has_preset_register_param * param )

#include <zephyr/bluetooth/audio/has.h>

Register preset.

Register preset. The preset will be a added to the list of exposed preset records. This symbol is linkable if

CONFIG_BT_HAS_PRESET_COUNT

is non-zero.

Parameters

param Preset registration parameter.

Returns: 0 if success, errno on failure.

◆ bt_has_preset_unavailable()

int bt_has_preset_unavailable ( uint8_t index )

#include <zephyr/bluetooth/audio/has.h>

Set the preset as unavailable.

Clear the BT_HAS_PROP_AVAILABLE property bit. This will notify preset availability to peer devices. Unavailable preset cannot be selected as active preset.

Parameters

index The index of preset that's became unavailable.

Returns: 0 in case of success or negative value in case of error.

◆ bt_has_preset_unregister()

int bt_has_preset_unregister ( uint8_t index )

#include <zephyr/bluetooth/audio/has.h>

Unregister Preset.

Unregister preset. The preset will be removed from the list of preset records.

Parameters

index The index of preset that's being requested to unregister.

Returns: 0 if success, errno on failure.

◆ bt_has_register()

int bt_has_register ( const struct bt_has_features_param * features )

#include <zephyr/bluetooth/audio/has.h>

Register the Hearing Access Service instance.

Parameters

features Hearing Access Service register parameters.

Returns: 0 if success, errno on failure.

Data Structures

Macros

Typedefs

Enumerations

Functions

Preset index definitions

Detailed Description

Macro Definition Documentation

◆ BT_HAS_PRESET_INDEX_FIRST

◆ BT_HAS_PRESET_INDEX_LAST

◆ BT_HAS_PRESET_INDEX_NONE

◆ BT_HAS_PRESET_NAME_MAX

◆ BT_HAS_PRESET_NAME_MIN

Typedef Documentation

◆ bt_has_preset_func_t

Enumeration Type Documentation

◆ anonymous enum

◆ bt_has_capabilities

◆ bt_has_hearing_aid_type

◆ bt_has_properties

Function Documentation

◆ bt_has_client_cb_register()

◆ bt_has_client_conn_get()

◆ bt_has_client_discover()

◆ bt_has_client_preset_next()

◆ bt_has_client_preset_prev()

◆ bt_has_client_preset_set()

◆ bt_has_client_presets_read()

◆ bt_has_features_set()

◆ bt_has_preset_active_clear()

◆ bt_has_preset_active_get()

◆ bt_has_preset_active_set()

◆ bt_has_preset_available()

◆ bt_has_preset_foreach()

◆ bt_has_preset_name_change()

◆ bt_has_preset_register()

◆ bt_has_preset_unavailable()

◆ bt_has_preset_unregister()

◆ bt_has_register()