88 lines
1.8 KiB
C
88 lines
1.8 KiB
C
/** @file
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* @brief GATT Battery Service
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*/
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/*
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* Copyright (c) 2018 Nordic Semiconductor ASA
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* Copyright (c) 2016 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <errno.h>
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#include <init.h>
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#include <sys/__assert.h>
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#include <stdbool.h>
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#include <zephyr/types.h>
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#include <bluetooth/bluetooth.h>
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#include <bluetooth/conn.h>
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#include <bluetooth/gatt.h>
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#include <bluetooth/uuid.h>
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#include <bluetooth/services/bas.h>
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#define LOG_LEVEL CONFIG_BT_BAS_LOG_LEVEL
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#include <logging/log.h>
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LOG_MODULE_REGISTER(bas);
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static uint8_t battery_level = 100U;
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static void blvl_ccc_cfg_changed(const struct bt_gatt_attr *attr,
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uint16_t value)
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{
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ARG_UNUSED(attr);
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bool notif_enabled = (value == BT_GATT_CCC_NOTIFY);
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LOG_INF("BAS Notifications %s", notif_enabled ? "enabled" : "disabled");
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}
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static ssize_t read_blvl(struct bt_conn *conn,
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const struct bt_gatt_attr *attr, void *buf,
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uint16_t len, uint16_t offset)
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{
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uint8_t lvl8 = battery_level;
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return bt_gatt_attr_read(conn, attr, buf, len, offset, &lvl8,
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sizeof(lvl8));
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}
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BT_GATT_SERVICE_DEFINE(bas,
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BT_GATT_PRIMARY_SERVICE(BT_UUID_BAS),
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BT_GATT_CHARACTERISTIC(BT_UUID_BAS_BATTERY_LEVEL,
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BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY,
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BT_GATT_PERM_READ, read_blvl, NULL,
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&battery_level),
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BT_GATT_CCC(blvl_ccc_cfg_changed,
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BT_GATT_PERM_READ | BT_GATT_PERM_WRITE),
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);
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static int bas_init(const struct device *dev)
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{
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ARG_UNUSED(dev);
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return 0;
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}
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uint8_t bt_bas_get_battery_level(void)
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{
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return battery_level;
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}
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int bt_bas_set_battery_level(uint8_t level)
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{
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int rc;
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if (level > 100U) {
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return -EINVAL;
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}
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battery_level = level;
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rc = bt_gatt_notify(NULL, &bas.attrs[1], &level, sizeof(level));
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return rc == -ENOTCONN ? 0 : rc;
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}
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SYS_INIT(bas_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);
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