440 lines
25 KiB
C
440 lines
25 KiB
C
/**
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* Copyright (c) 2012 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/** @file
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*
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* @defgroup ble_hids Human Interface Device Service
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* @{
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* @ingroup ble_sdk_srv
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* @brief Human Interface Device Service module.
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*
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* @details This module implements the Human Interface Device Service with the corresponding set of
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* characteristics. During initialization it adds the Human Interface Device Service and
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* a set of characteristics as per the Human Interface Device Service specification and
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* the user requirements to the BLE stack database.
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*
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* If enabled, notification of Input Report characteristics is performed when the
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* application calls the corresponding ble_hids_xx_input_report_send() function.
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*
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* If an event handler is supplied by the application, the Human Interface Device Service
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* will generate Human Interface Device Service events to the application.
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*
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* @note The application must register this module as BLE event observer using the
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* NRF_SDH_BLE_OBSERVER macro. Example:
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* @code
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* ble_hids_t instance;
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* NRF_SDH_BLE_OBSERVER(anything, BLE_HIDS_BLE_OBSERVER_PRIO,
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* ble_hids_on_ble_evt, &instance);
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* @endcode
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*
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* @note Attention!
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* To maintain compliance with Nordic Semiconductor ASA Bluetooth profile
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* qualification listings, this section of source code must not be modified.
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*/
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#ifndef BLE_HIDS_H__
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#define BLE_HIDS_H__
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#include <stdint.h>
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#include <stdbool.h>
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#include "ble.h"
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#include "ble_srv_common.h"
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#include "ble_link_ctx_manager.h"
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#include "nrf_sdh_ble.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**@brief Allocate static data for keeping host connection contexts.
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*
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* @param _name Name of BLE HIDS instance.
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* @param[in] _hids_max_clients Maximum number of HIDS clients connected at a time.
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* @param[in] ... Lengths of HIDS reports.
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*
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* @details
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* Mapping of HIDS reports in the HIDS report context:
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* - Structure of type @ref ble_hids_client_context_t
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* - Boot keyboard input report
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* - Boot keyboard output report
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* - Boot mouse input report
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* - Input reports
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* - Output reports
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* - Feature reports
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* @hideinitializer
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*/
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#define BLE_HIDS_DEF(_name, \
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_hids_max_clients, \
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...) \
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BLE_LINK_CTX_MANAGER_DEF(CONCAT_2(_name, _link_ctx_storage), \
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(_hids_max_clients), \
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BLE_HIDS_LINK_CTX_SIZE_CALC(__VA_ARGS__)); \
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static ble_hids_t _name = \
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{ \
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.p_link_ctx_storage = &CONCAT_2(_name, _link_ctx_storage) \
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}; \
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NRF_SDH_BLE_OBSERVER(_name ## _obs, \
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BLE_HIDS_BLE_OBSERVER_PRIO, \
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ble_hids_on_ble_evt, \
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&_name)
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/**@brief Helping macro for @ref BLE_HIDS_DEF, that calculates the link context size for BLE HIDS
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* instance.
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*
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* @param[in] ... Lengths of HIDS reports
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* @hideinitializer
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*/
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#define BLE_HIDS_LINK_CTX_SIZE_CALC(...) \
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(sizeof(ble_hids_client_context_t) + \
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MACRO_MAP_REC(BLE_HIDS_REPORT_ADD, __VA_ARGS__) \
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(BOOT_KB_INPUT_REPORT_MAX_SIZE) + \
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(BOOT_KB_OUTPUT_REPORT_MAX_SIZE) + \
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(BOOT_MOUSE_INPUT_REPORT_MAX_SIZE)) \
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/**@brief Helping macro for @ref BLE_HIDS_LINK_CTX_SIZE_CALC, that adds Input/Output/Feature report
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* lengths.
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*
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* @param[in] _report_size Length of the specific report.
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* @hideinitializer
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*/
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#define BLE_HIDS_REPORT_ADD(_report_size) (_report_size) +
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/** @name Report Type values
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* @anchor BLE_HIDS_REPORT_TYPE @{
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*/
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// Report Type values
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#define BLE_HIDS_REP_TYPE_INPUT 1
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#define BLE_HIDS_REP_TYPE_OUTPUT 2
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#define BLE_HIDS_REP_TYPE_FEATURE 3
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/** @} */
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// Maximum number of the various Report Types
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#define BLE_HIDS_MAX_INPUT_REP 10
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#define BLE_HIDS_MAX_OUTPUT_REP 10
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#define BLE_HIDS_MAX_FEATURE_REP 10
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// Information Flags
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#define HID_INFO_FLAG_REMOTE_WAKE_MSK 0x01
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#define HID_INFO_FLAG_NORMALLY_CONNECTABLE_MSK 0x02
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#define BOOT_KB_INPUT_REPORT_MAX_SIZE 8 /**< Maximum size of a Boot Keyboard Input Report (as per Appendix B in Device Class Definition for Human Interface Devices (HID), Version 1.11). */
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#define BOOT_KB_OUTPUT_REPORT_MAX_SIZE 1 /**< Maximum size of a Boot Keyboard Output Report (as per Appendix B in Device Class Definition for Human Interface Devices (HID), Version 1.11). */
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#define BOOT_MOUSE_INPUT_REPORT_MIN_SIZE 3 /**< Minimum size of a Boot Mouse Input Report (as per Appendix B in Device Class Definition for Human Interface Devices (HID), Version 1.11). */
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#define BOOT_MOUSE_INPUT_REPORT_MAX_SIZE 8 /**< Maximum size of a Boot Mouse Input Report (as per Appendix B in Device Class Definition for Human Interface Devices (HID), Version 1.11). */
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/**@brief HID Service characteristic id. */
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typedef struct
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{
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uint16_t uuid; /**< UUID of characteristic. */
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uint8_t rep_type; /**< Type of report (only used for BLE_UUID_REPORT_CHAR, see @ref BLE_HIDS_REPORT_TYPE). */
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uint8_t rep_index; /**< Index of the characteristic (only used for BLE_UUID_REPORT_CHAR). */
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} ble_hids_char_id_t;
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/**@brief HID Service event type. */
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typedef enum
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{
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BLE_HIDS_EVT_HOST_SUSP, /**< Suspend command received. */
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BLE_HIDS_EVT_HOST_EXIT_SUSP, /**< Exit suspend command received. */
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BLE_HIDS_EVT_NOTIF_ENABLED, /**< Notification enabled event. */
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BLE_HIDS_EVT_NOTIF_DISABLED, /**< Notification disabled event. */
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BLE_HIDS_EVT_REP_CHAR_WRITE, /**< A new value has been written to an Report characteristic. */
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BLE_HIDS_EVT_BOOT_MODE_ENTERED, /**< Boot mode entered. */
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BLE_HIDS_EVT_REPORT_MODE_ENTERED, /**< Report mode entered. */
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BLE_HIDS_EVT_REPORT_READ /**< Read with response */
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} ble_hids_evt_type_t;
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/**@brief HID Service event. */
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typedef struct
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{
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ble_hids_evt_type_t evt_type; /**< Type of event. */
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union
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{
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struct
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{
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ble_hids_char_id_t char_id; /**< Id of characteristic for which notification has been started. */
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} notification;
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struct
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{
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ble_hids_char_id_t char_id; /**< Id of characteristic having been written. */
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uint16_t offset; /**< Offset for the write operation. */
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uint16_t len; /**< Length of the incoming data. */
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uint8_t const * data; /**< Incoming data, variable length */
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} char_write;
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struct
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{
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ble_hids_char_id_t char_id; /**< Id of characteristic being read. */
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} char_auth_read;
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} params;
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ble_evt_t const * p_ble_evt; /**< corresponding received ble event, NULL if not relevant */
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} ble_hids_evt_t;
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// Forward declaration of the ble_hids_t type.
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typedef struct ble_hids_s ble_hids_t;
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/**@brief HID Service event handler type. */
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typedef void (*ble_hids_evt_handler_t) (ble_hids_t * p_hids, ble_hids_evt_t * p_evt);
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/**@brief Security requirements for HID Service characteristic. */
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typedef struct
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{
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security_req_t rd; /**< Security requirement for reading HID Service characteristic value. */
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security_req_t wr; /**< Security requirement for writing HID Service characteristic value. */
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security_req_t cccd_wr; /**< Security requirement for writing HID Service characteristic CCCD. */
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} ble_hids_char_sec_t;
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/**@brief HID Information characteristic value. */
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typedef struct
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{
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uint16_t bcd_hid; /**< 16-bit unsigned integer representing version number of base USB HID Specification implemented by HID Device */
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uint8_t b_country_code; /**< Identifies which country the hardware is localized for. Most hardware is not localized and thus this value would be zero (0). */
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uint8_t flags; /**< See http://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.hid_information.xml */
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security_req_t rd_sec; /**< Security requirement for reading HID Information characteristic value. */
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} ble_hids_hid_information_t;
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/**@brief HID Service Input Report characteristic init structure. This contains all options and
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* data needed for initialization of one Input Report characteristic. */
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typedef struct
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{
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uint16_t max_len; /**< Maximum length of characteristic value. */
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ble_srv_report_ref_t rep_ref; /**< Value of the Report Reference descriptor. */
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ble_hids_char_sec_t sec; /**< Security requirements for HID Service Input Report characteristic. */
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} ble_hids_inp_rep_init_t;
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/**@brief HID Service Output Report characteristic init structure. This contains all options and
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* data needed for initialization of one Output Report characteristic. */
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typedef struct
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{
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uint16_t max_len; /**< Maximum length of characteristic value. */
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ble_srv_report_ref_t rep_ref; /**< Value of the Report Reference descriptor. */
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ble_hids_char_sec_t sec; /**< Security requirements for HID Service Output Report characteristic. */
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} ble_hids_outp_rep_init_t;
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/**@brief HID Service Feature Report characteristic init structure. This contains all options and
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* data needed for initialization of one Feature Report characteristic. */
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typedef struct
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{
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uint16_t max_len; /**< Maximum length of characteristic value. */
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ble_srv_report_ref_t rep_ref; /**< Value of the Report Reference descriptor. */
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ble_hids_char_sec_t sec; /**< Security requirements for HID Service Feature Report characteristic. */
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} ble_hids_feature_rep_init_t;
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/**@brief HID Service Report Map characteristic init structure. This contains all options and data
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* needed for initialization of the Report Map characteristic. */
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typedef struct
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{
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uint8_t * p_data; /**< Report map data. */
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uint16_t data_len; /**< Length of report map data. */
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uint8_t ext_rep_ref_num; /**< Number of Optional External Report Reference descriptors. */
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ble_uuid_t const * p_ext_rep_ref; /**< Optional External Report Reference descriptor (will be added if != NULL). */
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security_req_t rd_sec; /**< Security requirement for HID Service Report Map characteristic. */
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} ble_hids_rep_map_init_t;
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/**@brief HID Report characteristic structure. */
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typedef struct
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{
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ble_gatts_char_handles_t char_handles; /**< Handles related to the Report characteristic. */
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uint16_t ref_handle; /**< Handle of the Report Reference descriptor. */
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} ble_hids_rep_char_t;
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/**@brief HID Host context structure. It keeps information relevant to a single host. */
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typedef struct
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{
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uint8_t protocol_mode; /**< Protocol mode. */
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uint8_t ctrl_pt; /**< HID Control Point. */
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} ble_hids_client_context_t;
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/**@brief HID Service init structure. This contains all options and data needed for initialization
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* of the service. */
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typedef struct
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{
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ble_hids_evt_handler_t evt_handler; /**< Event handler to be called for handling events in the HID Service. */
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ble_srv_error_handler_t error_handler; /**< Function to be called in case of an error. */
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bool is_kb; /**< TRUE if device is operating as a keyboard, FALSE if it is not. */
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bool is_mouse; /**< TRUE if device is operating as a mouse, FALSE if it is not. */
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uint8_t inp_rep_count; /**< Number of Input Report characteristics. */
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ble_hids_inp_rep_init_t const * p_inp_rep_array; /**< Information about the Input Report characteristics. */
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uint8_t outp_rep_count; /**< Number of Output Report characteristics. */
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ble_hids_outp_rep_init_t const * p_outp_rep_array; /**< Information about the Output Report characteristics. */
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uint8_t feature_rep_count; /**< Number of Feature Report characteristics. */
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ble_hids_feature_rep_init_t const * p_feature_rep_array; /**< Information about the Feature Report characteristics. */
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ble_hids_rep_map_init_t rep_map; /**< Information nedeed for initialization of the Report Map characteristic. */
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ble_hids_hid_information_t hid_information; /**< Value of the HID Information characteristic. */
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uint8_t included_services_count; /**< Number of services to include in HID service. */
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uint16_t * p_included_services_array; /**< Array of services to include in HID service. */
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security_req_t protocol_mode_rd_sec; /**< Security requirement for reading HID service Protocol Mode characteristic. */
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security_req_t protocol_mode_wr_sec; /**< Security requirement for writing HID service Protocol Mode characteristic. */
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security_req_t ctrl_point_wr_sec; /**< Security requirement for writing HID service Control Point characteristic. */
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ble_hids_char_sec_t boot_mouse_inp_rep_sec; /**< Security requirements for HID Boot Keyboard Input Report characteristic. */
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ble_hids_char_sec_t boot_kb_inp_rep_sec; /**< Security requirements for HID Boot Keyboard Input Report characteristic. */
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ble_hids_char_sec_t boot_kb_outp_rep_sec; /**< Security requirements for HID Boot Keyboard Output Report characteristic. */
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} ble_hids_init_t;
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/**@brief HID Service structure. This contains various status information for the service. */
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struct ble_hids_s
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{
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ble_hids_evt_handler_t evt_handler; /**< Event handler to be called for handling events in the HID Service. */
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ble_srv_error_handler_t error_handler; /**< Function to be called in case of an error. */
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uint16_t service_handle; /**< Handle of HID Service (as provided by the BLE stack). */
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ble_gatts_char_handles_t protocol_mode_handles; /**< Handles related to the Protocol Mode characteristic (will only be created if ble_hids_init_t.is_kb or ble_hids_init_t.is_mouse is set). */
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uint8_t inp_rep_count; /**< Number of Input Report characteristics. */
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ble_hids_rep_char_t inp_rep_array[BLE_HIDS_MAX_INPUT_REP]; /**< Information about the Input Report characteristics. */
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uint8_t outp_rep_count; /**< Number of Output Report characteristics. */
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ble_hids_rep_char_t outp_rep_array[BLE_HIDS_MAX_OUTPUT_REP]; /**< Information about the Output Report characteristics. */
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uint8_t feature_rep_count; /**< Number of Feature Report characteristics. */
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ble_hids_rep_char_t feature_rep_array[BLE_HIDS_MAX_FEATURE_REP]; /**< Information about the Feature Report characteristics. */
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ble_gatts_char_handles_t rep_map_handles; /**< Handles related to the Report Map characteristic. */
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uint16_t rep_map_ext_rep_ref_handle; /**< Handle of the Report Map External Report Reference descriptor. */
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ble_gatts_char_handles_t boot_kb_inp_rep_handles; /**< Handles related to the Boot Keyboard Input Report characteristic (will only be created if ble_hids_init_t.is_kb is set). */
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ble_gatts_char_handles_t boot_kb_outp_rep_handles; /**< Handles related to the Boot Keyboard Output Report characteristic (will only be created if ble_hids_init_t.is_kb is set). */
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ble_gatts_char_handles_t boot_mouse_inp_rep_handles; /**< Handles related to the Boot Mouse Input Report characteristic (will only be created if ble_hids_init_t.is_mouse is set). */
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ble_gatts_char_handles_t hid_information_handles; /**< Handles related to the Report Map characteristic. */
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ble_gatts_char_handles_t hid_control_point_handles; /**< Handles related to the Report Map characteristic. */
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blcm_link_ctx_storage_t * const p_link_ctx_storage; /**< Link context storage with handles of all current connections and its data context. */
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ble_hids_inp_rep_init_t const * p_inp_rep_init_array; /**< Pointer to information about the Input Report characteristics. */
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ble_hids_outp_rep_init_t const * p_outp_rep_init_array; /**< Pointer to information about the Output Report characteristics. */
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ble_hids_feature_rep_init_t const * p_feature_rep_init_array; /**< Pointer to information about the Feature Report characteristics. */
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};
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/**@brief Function for initializing the HID Service.
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*
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* @param[out] p_hids HID Service structure. This structure will have to be supplied by the
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* application. It will be initialized by this function, and will later be
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* used to identify this particular service instance.
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* @param[in] p_hids_init Information needed to initialize the service.
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*
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* @return NRF_SUCCESS on successful initialization of service, otherwise an error code.
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*/
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uint32_t ble_hids_init(ble_hids_t * p_hids, const ble_hids_init_t * p_hids_init);
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/**@brief Function for handling the Application's BLE Stack events.
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*
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* @details Handles all events from the BLE stack of interest to the HID Service.
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*
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* @param[in] p_ble_evt Event received from the BLE stack.
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* @param[in] p_context HID Service structure.
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*/
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void ble_hids_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context);
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/**@brief Function for sending Input Report.
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*
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* @details Sends data on an Input Report characteristic.
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*
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* @param[in] p_hids HID Service structure.
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* @param[in] rep_index Index of the characteristic (corresponding to the index in
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* ble_hids_t.inp_rep_array as passed to ble_hids_init()).
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* @param[in] len Length of data to be sent.
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* @param[in] p_data Pointer to data to be sent.
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* @param[in] conn_handle Connection handle, where the notification will be sent.
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*
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* @return NRF_SUCCESS on successful sending of input report, otherwise an error code.
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*/
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uint32_t ble_hids_inp_rep_send(ble_hids_t * p_hids,
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uint8_t rep_index,
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uint16_t len,
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uint8_t * p_data,
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uint16_t conn_handle);
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/**@brief Function for sending Boot Keyboard Input Report.
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*
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* @details Sends data on an Boot Keyboard Input Report characteristic.
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*
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* @param[in] p_hids HID Service structure.
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* @param[in] len Length of data to be sent.
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* @param[in] p_data Pointer to data to be sent.
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* @param[in] conn_handle Connection handle, where the notification will be sent.
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*
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* @return NRF_SUCCESS on successful sending of the report, otherwise an error code.
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*/
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uint32_t ble_hids_boot_kb_inp_rep_send(ble_hids_t * p_hids,
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uint16_t len,
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uint8_t * p_data,
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uint16_t conn_handle);
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/**@brief Function for sending Boot Mouse Input Report.
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*
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* @details Sends data on an Boot Mouse Input Report characteristic.
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*
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* @param[in] p_hids HID Service structure.
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* @param[in] buttons State of mouse buttons.
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* @param[in] x_delta Horizontal movement.
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* @param[in] y_delta Vertical movement.
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* @param[in] optional_data_len Length of optional part of Boot Mouse Input Report.
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* @param[in] p_optional_data Optional part of Boot Mouse Input Report.
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* @param[in] conn_handle Connection handle.
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*
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* @return NRF_SUCCESS on successful sending of the report, otherwise an error code.
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*/
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uint32_t ble_hids_boot_mouse_inp_rep_send(ble_hids_t * p_hids,
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uint8_t buttons,
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int8_t x_delta,
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int8_t y_delta,
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uint16_t optional_data_len,
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uint8_t * p_optional_data,
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uint16_t conn_handle);
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/**@brief Function for getting the current value of Output Report from the stack.
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*
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* @details Fetches the current value of the output report characteristic from the stack.
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*
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* @param[in] p_hids HID Service structure.
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* @param[in] rep_index Index of the characteristic (corresponding to the index in
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* ble_hids_t.outp_rep_array as passed to ble_hids_init()).
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* @param[in] len Length of output report needed.
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* @param[in] offset Offset in bytes to read from.
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* @param[in] conn_handle Connection handle.
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* @param[out] p_outp_rep Pointer to the output report.
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*
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* @return NRF_SUCCESS on successful read of the report, otherwise an error code.
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*/
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uint32_t ble_hids_outp_rep_get(ble_hids_t * p_hids,
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uint8_t rep_index,
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uint16_t len,
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uint8_t offset,
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uint16_t conn_handle,
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uint8_t * p_outp_rep);
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#ifdef __cplusplus
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}
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#endif
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#endif // BLE_HIDS_H__
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/** @} */
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