82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/** @file
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* @brief HRS Service sample
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*/
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/*
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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 <zephyr/types.h>
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#include <stddef.h>
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#include <string.h>
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#include <errno.h>
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#include <zephyr.h>
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#include <init.h>
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#include <bluetooth/bluetooth.h>
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#include <bluetooth/hci.h>
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#include <bluetooth/conn.h>
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#include <bluetooth/uuid.h>
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#include <bluetooth/gatt.h>
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#define LOG_LEVEL CONFIG_BT_HRS_LOG_LEVEL
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#include <logging/log.h>
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LOG_MODULE_REGISTER(hrs);
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static uint8_t hrs_blsc;
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static void hrmc_ccc_cfg_changed(const struct bt_gatt_attr *attr, 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("HRS notifications %s", notif_enabled ? "enabled" : "disabled");
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}
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static ssize_t read_blsc(struct bt_conn *conn, const struct bt_gatt_attr *attr,
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void *buf, uint16_t len, uint16_t offset)
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{
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return bt_gatt_attr_read(conn, attr, buf, len, offset, &hrs_blsc,
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sizeof(hrs_blsc));
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}
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/* Heart Rate Service Declaration */
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BT_GATT_SERVICE_DEFINE(hrs_svc,
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BT_GATT_PRIMARY_SERVICE(BT_UUID_HRS),
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BT_GATT_CHARACTERISTIC(BT_UUID_HRS_MEASUREMENT, BT_GATT_CHRC_NOTIFY,
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BT_GATT_PERM_NONE, NULL, NULL, NULL),
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BT_GATT_CCC(hrmc_ccc_cfg_changed,
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BT_GATT_PERM_READ | BT_GATT_PERM_WRITE),
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BT_GATT_CHARACTERISTIC(BT_UUID_HRS_BODY_SENSOR, BT_GATT_CHRC_READ,
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BT_GATT_PERM_READ, read_blsc, NULL, NULL),
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BT_GATT_CHARACTERISTIC(BT_UUID_HRS_CONTROL_POINT, BT_GATT_CHRC_WRITE,
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BT_GATT_PERM_NONE, NULL, NULL, NULL),
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);
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static int hrs_init(const struct device *dev)
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{
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ARG_UNUSED(dev);
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hrs_blsc = 0x01;
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return 0;
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}
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int bt_hrs_notify(uint16_t heartrate)
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{
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int rc;
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static uint8_t hrm[2];
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hrm[0] = 0x06; /* uint8, sensor contact */
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hrm[1] = heartrate;
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rc = bt_gatt_notify(NULL, &hrs_svc.attrs[1], &hrm, sizeof(hrm));
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return rc == -ENOTCONN ? 0 : rc;
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}
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SYS_INIT(hrs_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);
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