Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | /** @file
* @brief CTS 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 <sys/printk.h>
#include <sys/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 uint8_t ct[10];
static uint8_t ct_update;
static void ct_ccc_cfg_changed(const struct bt_gatt_attr *attr, 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 flags)
{
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 = 1U;
return len;
}
/* Current Time Service Declaration */
BT_GATT_SERVICE_DEFINE(cts_cvs,
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_PERM_READ | BT_GATT_PERM_WRITE,
read_ct, write_ct, ct),
BT_GATT_CCC(ct_ccc_cfg_changed, BT_GATT_PERM_READ | BT_GATT_PERM_WRITE),
);
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] = 5U; /* months starting from 1 */
buf[3] = 30U; /* day */
buf[4] = 12U; /* hours */
buf[5] = 45U; /* minutes */
buf[6] = 30U; /* seconds */
/* 'Day of Week' part of 'Day Date Time' */
buf[7] = 1U; /* day of week starting from 1 */
/* 'Fractions 256 part of 'Exact Time 256' */
buf[8] = 0U;
/* Adjust reason */
buf[9] = 0U; /* No update, change, etc */
}
void cts_init(void)
{
/* Simulate current time for Current Time Service */
generate_current_time(ct);
}
void cts_notify(void)
{ /* Current Time Service updates only when time is changed */
if (!ct_update) {
return;
}
ct_update = 0U;
bt_gatt_notify(NULL, &cts_cvs.attrs[1], &ct, sizeof(ct));
}
|