123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/** @file
|
|
* @brief CTS Service sample
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2016 Intel Corporation
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" CTSIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <stdint.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 ct_ccc_cfg[CONFIG_BLUETOOTH_MAX_PAIRED] = {};
|
|
static uint8_t ct[10];
|
|
static uint8_t ct_update;
|
|
|
|
static void ct_ccc_cfg_changed(uint16_t value)
|
|
{
|
|
/* TODO: Handle value */
|
|
}
|
|
|
|
static ssize_t read_ct(struct bt_conn *conn, const struct bt_gatt_attr *attr,
|
|
void *buf, uint16_t len, uint16_t offset)
|
|
{
|
|
const char *value = attr->user_data;
|
|
|
|
return bt_gatt_attr_read(conn, attr, buf, len, offset, value,
|
|
sizeof(ct));
|
|
}
|
|
|
|
static ssize_t write_ct(struct bt_conn *conn, const struct bt_gatt_attr *attr,
|
|
const void *buf, uint16_t len, uint16_t offset)
|
|
{
|
|
uint8_t *value = attr->user_data;
|
|
|
|
if (offset + len > sizeof(ct)) {
|
|
return BT_GATT_ERR(BT_ATT_ERR_INVALID_OFFSET);
|
|
}
|
|
|
|
memcpy(value + offset, buf, len);
|
|
ct_update = 1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/* Current Time Service Declaration */
|
|
static struct bt_gatt_attr attrs[] = {
|
|
BT_GATT_PRIMARY_SERVICE(BT_UUID_CTS),
|
|
BT_GATT_CHARACTERISTIC(BT_UUID_CTS_CURRENT_TIME, BT_GATT_CHRC_READ |
|
|
BT_GATT_CHRC_NOTIFY | BT_GATT_CHRC_WRITE),
|
|
BT_GATT_DESCRIPTOR(BT_UUID_CTS_CURRENT_TIME,
|
|
BT_GATT_PERM_READ | BT_GATT_PERM_WRITE,
|
|
read_ct, write_ct, ct),
|
|
BT_GATT_CCC(ct_ccc_cfg, ct_ccc_cfg_changed),
|
|
};
|
|
|
|
static void generate_current_time(uint8_t *buf)
|
|
{
|
|
uint16_t year;
|
|
|
|
/* 'Exact Time 256' contains 'Day Date Time' which contains
|
|
* 'Date Time' - characteristic contains fields for:
|
|
* year, month, day, hours, minutes and seconds.
|
|
*/
|
|
|
|
year = sys_cpu_to_le16(2015);
|
|
memcpy(buf, &year, 2); /* year */
|
|
buf[2] = 5; /* months starting from 1 */
|
|
buf[3] = 30; /* day */
|
|
buf[4] = 12; /* hours */
|
|
buf[5] = 45; /* minutes */
|
|
buf[6] = 30; /* seconds */
|
|
|
|
/* 'Day of Week' part of 'Day Date Time' */
|
|
buf[7] = 1; /* day of week starting from 1 */
|
|
|
|
/* 'Fractions 256 part of 'Exact Time 256' */
|
|
buf[8] = 0;
|
|
|
|
/* Adjust reason */
|
|
buf[9] = 0; /* No update, change, etc */
|
|
}
|
|
|
|
void cts_init(void)
|
|
{
|
|
/* Simulate current time for Current Time Service */
|
|
generate_current_time(ct);
|
|
|
|
bt_gatt_register(attrs, ARRAY_SIZE(attrs));
|
|
}
|
|
|
|
void cts_notify(void)
|
|
{ /* Current Time Service updates only when time is changed */
|
|
if (!ct_update) {
|
|
return;
|
|
}
|
|
|
|
ct_update = 0;
|
|
bt_gatt_notify(NULL, &attrs[3], &ct, sizeof(ct));
|
|
}
|