| /** @file |
| * @brief HRS Service sample |
| */ |
| |
| /* |
| * Copyright (c) 2016 Intel Corporation |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/types.h> |
| #include <stddef.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <misc/printk.h> |
| #include <misc/byteorder.h> |
| #include <zephyr.h> |
| |
| #include <bluetooth/bluetooth.h> |
| #include <bluetooth/hci.h> |
| #include <bluetooth/conn.h> |
| #include <bluetooth/uuid.h> |
| #include <bluetooth/gatt.h> |
| |
| static struct bt_gatt_ccc_cfg hrmc_ccc_cfg[BT_GATT_CCC_MAX] = {}; |
| static u8_t simulate_hrm; |
| static u8_t heartrate = 90; |
| static u8_t hrs_blsc; |
| |
| static void hrmc_ccc_cfg_changed(const struct bt_gatt_attr *attr, |
| u16_t value) |
| { |
| simulate_hrm = (value == BT_GATT_CCC_NOTIFY) ? 1 : 0; |
| } |
| |
| static ssize_t read_blsc(struct bt_conn *conn, const struct bt_gatt_attr *attr, |
| void *buf, u16_t len, u16_t offset) |
| { |
| return bt_gatt_attr_read(conn, attr, buf, len, offset, &hrs_blsc, |
| sizeof(hrs_blsc)); |
| } |
| |
| /* Heart Rate Service Declaration */ |
| static struct bt_gatt_attr attrs[] = { |
| BT_GATT_PRIMARY_SERVICE(BT_UUID_HRS), |
| BT_GATT_CHARACTERISTIC(BT_UUID_HRS_MEASUREMENT, BT_GATT_CHRC_NOTIFY), |
| BT_GATT_DESCRIPTOR(BT_UUID_HRS_MEASUREMENT, BT_GATT_PERM_READ, NULL, |
| NULL, NULL), |
| BT_GATT_CCC(hrmc_ccc_cfg, hrmc_ccc_cfg_changed), |
| BT_GATT_CHARACTERISTIC(BT_UUID_HRS_BODY_SENSOR, BT_GATT_CHRC_READ), |
| BT_GATT_DESCRIPTOR(BT_UUID_HRS_BODY_SENSOR, BT_GATT_PERM_READ, |
| read_blsc, NULL, NULL), |
| BT_GATT_CHARACTERISTIC(BT_UUID_HRS_CONTROL_POINT, BT_GATT_CHRC_WRITE), |
| /* TODO: Add write permission and callback */ |
| BT_GATT_DESCRIPTOR(BT_UUID_HRS_CONTROL_POINT, BT_GATT_PERM_READ, NULL, |
| NULL, NULL), |
| }; |
| |
| static struct bt_gatt_service hrs_svc = BT_GATT_SERVICE(attrs); |
| |
| void hrs_init(u8_t blsc) |
| { |
| hrs_blsc = blsc; |
| |
| bt_gatt_service_register(&hrs_svc); |
| } |
| |
| void hrs_notify(void) |
| { |
| static u8_t hrm[2]; |
| |
| /* Heartrate measurements simulation */ |
| if (!simulate_hrm) { |
| return; |
| } |
| |
| heartrate++; |
| if (heartrate == 160) { |
| heartrate = 90; |
| } |
| |
| hrm[0] = 0x06; /* uint8, sensor contact */ |
| hrm[1] = heartrate; |
| |
| bt_gatt_notify(NULL, &attrs[2], &hrm, sizeof(hrm)); |
| } |