btstack/example/ublox_spp_le_counter.c
2022-04-30 22:05:44 +02:00

227 lines
8.1 KiB
C

/*
* Copyright (C) 2014 BlueKitchen GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* 4. Any redistribution, use, or modification is done solely for
* personal benefit and not for any commercial purpose or for
* monetary gain.
*
* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN
* GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Please inquire about commercial licensing options at
* contact@bluekitchen-gmbh.com
*
*/
#define BTSTACK_FILE__ "ublox_spp_le_counter.c"
// *****************************************************************************
/* EXAMPLE_START(ublox_spp_le_counter): LE u-blox SPP-like Heartbeat Server
*
*/
// *****************************************************************************
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "btstack.h"
#include "ble/gatt-service/device_information_service_server.h"
#include "ble/gatt-service/ublox_spp_service_server.h"
// ublox_spp_le_counter.gatt contains the declaration of the provided GATT Services + Characteristics
// ublox_spp_le_counter.h contains the binary representation of ublox_spp_le_counter.gatt
// it is generated by the build system by calling: $BTSTACK_ROOT/tool/compile_gatt.py ublox_spp_le_counter.gatt ublox_spp_le_counter.h
// it needs to be regenerated when the GATT Database declared in ublox_spp_le_counter.gatt file is modified
#include "ublox_spp_le_counter.h"
#define HEARTBEAT_PERIOD_MS 1000
/* @section Main Application Setup
*
* @text Listing MainConfiguration shows main application code.
* It initializes L2CAP, the Security Manager and configures the ATT Server with the pre-compiled
* ATT Database generated from $ublox_le_counter.gatt$.
* Additionally, it enables the Battery Service Server with the current battery level.
* Finally, it configures the advertisements
* and the heartbeat handler and boots the Bluetooth stack.
* In this example, the Advertisement contains the Flags attribute and the device name.
* The flag 0x06 indicates: LE General Discoverable Mode and BR/EDR not supported.
*/
/* LISTING_START(MainConfiguration): Init L2CAP SM ATT Server and start heartbeat timer */
static btstack_timer_source_t heartbeat;
static hci_con_handle_t con_handle = HCI_CON_HANDLE_INVALID;
static btstack_context_callback_registration_t send_request;
static btstack_packet_callback_registration_t hci_event_callback_registration;
const uint8_t adv_data[] = {
// Flags general discoverable, BR/EDR not supported
2, BLUETOOTH_DATA_TYPE_FLAGS, 0x06,
// Name
5, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, '6', '-','5', '6',
// UUID ...
17, BLUETOOTH_DATA_TYPE_COMPLETE_LIST_OF_128_BIT_SERVICE_CLASS_UUIDS, 0x1, 0xd7, 0xe9, 0x1, 0x4f, 0xf3, 0x44, 0xe7, 0x83, 0x8f, 0xe2, 0x26, 0xb9, 0xe1, 0x56, 0x24,
};
const uint8_t adv_data_len = sizeof(adv_data);
/* LISTING_END */
/*
* @section Heartbeat Handler
*
* @text The heartbeat handler updates the value of the single Characteristic provided in this example,
* and request a ATT_EVENT_CAN_SEND_NOW to send a notification if enabled see Listing heartbeat.
*/
/* LISTING_START(heartbeat): Hearbeat Handler */
static int counter = 0;
static char counter_string[30];
static int counter_string_len;
static void beat(void){
counter++;
counter_string_len = snprintf(counter_string, sizeof(counter_string), "BTstack counter %03u", counter);
}
static void ublox_can_send(void * context){
UNUSED(context);
beat();
printf("SEND: %s\n", counter_string);
ublox_spp_service_server_send(con_handle, (uint8_t*) counter_string, counter_string_len);
}
static void heartbeat_handler(struct btstack_timer_source *ts){
if (con_handle != HCI_CON_HANDLE_INVALID) {
send_request.callback = &ublox_can_send;
ublox_spp_service_server_request_can_send_now(&send_request, con_handle);
}
btstack_run_loop_set_timer(ts, HEARTBEAT_PERIOD_MS);
btstack_run_loop_add_timer(ts);
}
/* LISTING_END */
static void ublox_spp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
switch (packet_type){
case HCI_EVENT_PACKET:
if (hci_event_packet_get_type(packet) != HCI_EVENT_GATTSERVICE_META) break;
switch (hci_event_gattservice_meta_get_subevent_code(packet)){
case GATTSERVICE_SUBEVENT_SPP_SERVICE_CONNECTED:
con_handle = gattservice_subevent_spp_service_connected_get_con_handle(packet);
printf("Connected with handle 0x%04x\n", con_handle);
break;
case GATTSERVICE_SUBEVENT_SPP_SERVICE_DISCONNECTED:
con_handle = HCI_CON_HANDLE_INVALID;
break;
default:
break;
}
break;
case RFCOMM_DATA_PACKET:
printf("RECV: ");
printf_hexdump(packet, size);
break;
default:
break;
}
}
/*
* @section Packet Handler
*
* @text The packet handler is used to:
* - stop the counter after a disconnect
*/
/* LISTING_START(packetHandler): Packet Handler */
static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
UNUSED(size);
switch (packet_type) {
case HCI_EVENT_PACKET:
switch (hci_event_packet_get_type(packet)) {
case HCI_EVENT_DISCONNECTION_COMPLETE:
con_handle = HCI_CON_HANDLE_INVALID;
break;
default:
break;
}
break;
default:
break;
}
}
/* LISTING_END */
int btstack_main(void);
int btstack_main(void)
{
// register for HCI events
hci_event_callback_registration.callback = &packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
l2cap_init();
// setup SM: Display only
sm_init();
// setup ATT server
att_server_init(profile_data, NULL, NULL);
// setup device information service
device_information_service_server_init();
// setup Nordic SPP service
ublox_spp_service_server_init(&ublox_spp_packet_handler);
// setup advertisements
uint16_t adv_int_min = 0x0030;
uint16_t adv_int_max = 0x0030;
uint8_t adv_type = 0;
bd_addr_t null_addr;
memset(null_addr, 0, 6);
gap_advertisements_set_params(adv_int_min, adv_int_max, adv_type, 0, null_addr, 0x07, 0x00);
gap_advertisements_set_data(adv_data_len, (uint8_t*) adv_data);
gap_advertisements_enable(1);
// set one-shot timer
heartbeat.process = &heartbeat_handler;
btstack_run_loop_set_timer(&heartbeat, HEARTBEAT_PERIOD_MS);
btstack_run_loop_add_timer(&heartbeat);
// beat once
beat();
// turn on!
hci_power_control(HCI_POWER_ON);
return 0;
}
/* EXAMPLE_END */