88 lines
1.8 KiB
C
88 lines
1.8 KiB
C
/** @file
|
|
* @brief GATT Battery Service
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2018 Nordic Semiconductor ASA
|
|
* Copyright (c) 2016 Intel Corporation
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <init.h>
|
|
#include <sys/__assert.h>
|
|
#include <stdbool.h>
|
|
#include <zephyr/types.h>
|
|
|
|
#include <bluetooth/bluetooth.h>
|
|
#include <bluetooth/conn.h>
|
|
#include <bluetooth/gatt.h>
|
|
#include <bluetooth/uuid.h>
|
|
#include <bluetooth/services/bas.h>
|
|
|
|
#define LOG_LEVEL CONFIG_BT_GATT_BAS_LOG_LEVEL
|
|
#include <logging/log.h>
|
|
LOG_MODULE_REGISTER(bas);
|
|
|
|
static u8_t battery_level = 100U;
|
|
|
|
static void blvl_ccc_cfg_changed(const struct bt_gatt_attr *attr,
|
|
u16_t value)
|
|
{
|
|
ARG_UNUSED(attr);
|
|
|
|
bool notif_enabled = (value == BT_GATT_CCC_NOTIFY);
|
|
|
|
LOG_INF("BAS Notifications %s", notif_enabled ? "enabled" : "disabled");
|
|
}
|
|
|
|
static ssize_t read_blvl(struct bt_conn *conn,
|
|
const struct bt_gatt_attr *attr, void *buf,
|
|
u16_t len, u16_t offset)
|
|
{
|
|
u8_t lvl8 = battery_level;
|
|
|
|
return bt_gatt_attr_read(conn, attr, buf, len, offset, &lvl8,
|
|
sizeof(lvl8));
|
|
}
|
|
|
|
BT_GATT_SERVICE_DEFINE(bas,
|
|
BT_GATT_PRIMARY_SERVICE(BT_UUID_BAS),
|
|
BT_GATT_CHARACTERISTIC(BT_UUID_BAS_BATTERY_LEVEL,
|
|
BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY,
|
|
BT_GATT_PERM_READ, read_blvl, NULL,
|
|
&battery_level),
|
|
BT_GATT_CCC(blvl_ccc_cfg_changed,
|
|
BT_GATT_PERM_READ | BT_GATT_PERM_WRITE),
|
|
);
|
|
|
|
static int bas_init(struct device *dev)
|
|
{
|
|
ARG_UNUSED(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
u8_t bt_gatt_bas_get_battery_level(void)
|
|
{
|
|
return battery_level;
|
|
}
|
|
|
|
int bt_gatt_bas_set_battery_level(u8_t level)
|
|
{
|
|
int rc;
|
|
|
|
if (level > 100U) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
battery_level = level;
|
|
|
|
rc = bt_gatt_notify(NULL, &bas.attrs[1], &level, sizeof(level));
|
|
|
|
return rc == -ENOTCONN ? 0 : rc;
|
|
}
|
|
|
|
SYS_INIT(bas_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);
|