bas_client.h

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/*
 * Copyright (c) 2018 Nordic Semiconductor
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */
 
#ifndef __BAS_C_H
#define __BAS_C_H
 
#include <zephyr/kernel.h>
#include <sys/types.h>
#include <zephyr/bluetooth/gatt.h>
#include <zephyr/bluetooth/conn.h>
#include <zephyr/bluetooth/uuid.h>
#include <bluetooth/gatt_dm.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define BT_BAS_VAL_INVALID (255)
 
#define BT_BAS_VAL_MAX (100)
 
struct bt_bas_client;
 
typedef void (*bt_bas_notify_cb)(struct bt_bas_client *bas,
                                 uint8_t battery_level);
 
typedef void (*bt_bas_read_cb)(struct bt_bas_client *bas,
                               uint8_t battery_level,
                               int err);
 
/* @brief Battery Service Client characteristic periodic read. */
struct bt_bas_periodic_read {
        struct k_work_delayable read_work;
        struct bt_gatt_read_params params;
        atomic_t interval;
};
 
struct bt_bas_client {
        struct bt_conn *conn;
        struct bt_gatt_subscribe_params notify_params;
        struct bt_gatt_read_params read_params;
        struct bt_bas_periodic_read periodic_read;
        bt_bas_notify_cb notify_cb;
        bt_bas_read_cb read_cb;
        uint16_t val_handle;
        uint16_t ccc_handle;
        uint8_t battery_level;
        uint8_t properties;
        bool notify;
};
 
void bt_bas_client_init(struct bt_bas_client *bas);
 
int bt_bas_handles_assign(struct bt_gatt_dm *dm,
                          struct bt_bas_client *bas);
 
int bt_bas_subscribe_battery_level(struct bt_bas_client *bas,
                                   bt_bas_notify_cb func);
 
int bt_bas_unsubscribe_battery_level(struct bt_bas_client *bas);
 
struct bt_conn *bt_bas_conn(const struct bt_bas_client *bas);
 
 
int bt_bas_read_battery_level(struct bt_bas_client *bas, bt_bas_read_cb func);
 
int bt_bas_get_last_battery_level(struct bt_bas_client *bas);
 
static inline bool bt_bas_notify_supported(struct bt_bas_client *bas)
{
        return bas->notify;
}
 
int bt_bas_start_per_read_battery_level(struct bt_bas_client *bas,
                                        int32_t interval,
                                        bt_bas_notify_cb func);
 
void bt_bas_stop_per_read_battery_level(struct bt_bas_client *bas);
 
#ifdef __cplusplus
}
#endif
 
#endif /* __BAS_C_H  */