/*
* 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 MATTHIAS
* RINGWALD 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__ "spp_and_gatt_counter.c"
// *****************************************************************************
/* EXAMPLE_START(spp_and_le_counter): Dual Mode - SPP and LE Counter
*
* @text The SPP and LE Counter example combines the Bluetooth Classic SPP Counter
* and the Bluetooth LE Counter into a single application.
*
* @text In this Section, we only point out the differences to the individual examples
* and how the stack is configured.
*
* @text Note: To test, please run the example, and then:
* - for SPP pair from a remote device, and open the Virtual Serial Port,
* - for LE use some GATT Explorer, e.g. LightBlue, BLExplr, to enable notifications.
*/
// *****************************************************************************
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "btstack.h"
#include "spp_and_gatt_counter.h"
#define RFCOMM_SERVER_CHANNEL 1
#define HEARTBEAT_PERIOD_MS 1000
static uint16_t rfcomm_channel_id;
static uint8_t spp_service_buffer[150];
static int le_notification_enabled;
static hci_con_handle_t att_con_handle;
// THE Couner
static btstack_timer_source_t heartbeat;
static int counter = 0;
static char counter_string[30];
static int counter_string_len;
static btstack_packet_callback_registration_t hci_event_callback_registration;
#ifdef ENABLE_GATT_OVER_CLASSIC
static uint8_t gatt_service_buffer[70];
#endif
/*
* @section Advertisements
*
* @text The Flags attribute in the Advertisement Data indicates if a device is in dual-mode or not.
* Flag 0x06 indicates LE General Discoverable, BR/EDR not supported although we're actually using BR/EDR.
* In the past, there have been problems with Anrdoid devices when the flag was not set.
* Setting it should prevent the remote implementation to try to use GATT over LE/EDR, which is not
* implemented by BTstack. So, setting the flag seems like the safer choice (while it's technically incorrect).
*/
/* LISTING_START(advertisements): Advertisement data: Flag 0x06 indicates LE-only device */
const uint8_t adv_data[] = {
// Flags general discoverable, BR/EDR not supported
0x02, BLUETOOTH_DATA_TYPE_FLAGS, 0x06,
// Name
0x0b, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, 'L', 'E', ' ', 'C', 'o', 'u', 'n', 't', 'e', 'r',
// Incomplete List of 16-bit Service Class UUIDs -- FF10 - only valid for testing!
0x03, BLUETOOTH_DATA_TYPE_INCOMPLETE_LIST_OF_16_BIT_SERVICE_CLASS_UUIDS, 0x10, 0xff,
};
/* LISTING_END */
uint8_t adv_data_len = sizeof(adv_data);
/*
* @section Packet Handler
*
* @text The packet handler of the combined example is just the combination of the individual packet handlers.
*/
static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
bd_addr_t event_addr;
uint8_t rfcomm_channel_nr;
uint16_t mtu;
int i;
switch (packet_type) {
case HCI_EVENT_PACKET:
switch (hci_event_packet_get_type(packet)) {
case HCI_EVENT_PIN_CODE_REQUEST:
// inform about pin code request
printf("Pin code request - using '0000'\n");
hci_event_pin_code_request_get_bd_addr(packet, event_addr);
gap_pin_code_response(event_addr, "0000");
break;
case HCI_EVENT_USER_CONFIRMATION_REQUEST:
// inform about user confirmation request
printf("SSP User Confirmation Request with numeric value '%06"PRIu32"'\n", little_endian_read_32(packet, 8));
printf("SSP User Confirmation Auto accept\n");
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
le_notification_enabled = 0;
break;
case ATT_EVENT_CAN_SEND_NOW:
att_server_notify(att_con_handle, ATT_CHARACTERISTIC_0000FF11_0000_1000_8000_00805F9B34FB_01_VALUE_HANDLE, (uint8_t*) counter_string, counter_string_len);
break;
case RFCOMM_EVENT_INCOMING_CONNECTION:
// data: event (8), len(8), address(48), channel (8), rfcomm_cid (16)
rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr);
rfcomm_channel_nr = rfcomm_event_incoming_connection_get_server_channel(packet);
rfcomm_channel_id = rfcomm_event_incoming_connection_get_rfcomm_cid(packet);
printf("RFCOMM channel %u requested for %s\n", rfcomm_channel_nr, bd_addr_to_str(event_addr));
rfcomm_accept_connection(rfcomm_channel_id);
break;
case RFCOMM_EVENT_CHANNEL_OPENED:
// data: event(8), len(8), status (8), address (48), server channel(8), rfcomm_cid(16), max frame size(16)
if (rfcomm_event_channel_opened_get_status(packet)) {
printf("RFCOMM channel open failed, status %u\n", rfcomm_event_channel_opened_get_status(packet));
} else {
rfcomm_channel_id = rfcomm_event_channel_opened_get_rfcomm_cid(packet);
mtu = rfcomm_event_channel_opened_get_max_frame_size(packet);
printf("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u\n", rfcomm_channel_id, mtu);
}
break;
case RFCOMM_EVENT_CAN_SEND_NOW:
rfcomm_send(rfcomm_channel_id, (uint8_t*) counter_string, counter_string_len);
break;
case RFCOMM_EVENT_CHANNEL_CLOSED:
printf("RFCOMM channel closed\n");
rfcomm_channel_id = 0;
break;
default:
break;
}
break;
case RFCOMM_DATA_PACKET:
printf("RCV: '");
for (i=0;i<size;i++){
putchar(packet[i]);
}
printf("'\n");
break;
default:
break;
}
}
// ATT Client Read Callback for Dynamic Data
// - if buffer == NULL, don't copy data, just return size of value
// - if buffer != NULL, copy data and return number bytes copied
// @param offset defines start of attribute value
static uint16_t att_read_callback(hci_con_handle_t con_handle, uint16_t att_handle, uint16_t offset, uint8_t * buffer, uint16_t buffer_size){
UNUSED(con_handle);
if (att_handle == ATT_CHARACTERISTIC_0000FF11_0000_1000_8000_00805F9B34FB_01_VALUE_HANDLE){
return att_read_callback_handle_blob((const uint8_t *)counter_string, counter_string_len, offset, buffer, buffer_size);
}
return 0;
}
// write requests
static int att_write_callback(hci_con_handle_t con_handle, uint16_t att_handle, uint16_t transaction_mode, uint16_t offset, uint8_t *buffer, uint16_t buffer_size){
// ignore cancel sent for new connections
if (transaction_mode == ATT_TRANSACTION_MODE_CANCEL) return 0;
// find characteristic for handle
switch (att_handle){
case ATT_CHARACTERISTIC_0000FF11_0000_1000_8000_00805F9B34FB_01_CLIENT_CONFIGURATION_HANDLE:
le_notification_enabled = little_endian_read_16(buffer, 0) == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION;
att_con_handle = con_handle;
return 0;
case ATT_CHARACTERISTIC_0000FF11_0000_1000_8000_00805F9B34FB_01_VALUE_HANDLE:
printf("Write on test characteristic: ");
printf_hexdump(buffer, buffer_size);
return 0;
default:
printf("WRITE Callback, handle %04x, mode %u, offset %u, data: ", con_handle, transaction_mode, offset);
printf_hexdump(buffer, buffer_size);
return 0;
}
}
static void beat(void){
counter++;
counter_string_len = sprintf(counter_string, "BTstack counter %04u", counter);
puts(counter_string);
}
/*
* @section Heartbeat Handler
*
* @text Similar to the packet handler, the heartbeat handler is the combination of the individual ones.
* After updating the counter, it requests an ATT_EVENT_CAN_SEND_NOW and/or RFCOMM_EVENT_CAN_SEND_NOW
*/
/* LISTING_START(heartbeat): Combined Heartbeat handler */
static void heartbeat_handler(struct btstack_timer_source *ts){
if (rfcomm_channel_id || le_notification_enabled) {
beat();
}
if (rfcomm_channel_id){
rfcomm_request_can_send_now_event(rfcomm_channel_id);
}
if (le_notification_enabled) {
att_server_request_can_send_now_event(att_con_handle);
}
btstack_run_loop_set_timer(ts, HEARTBEAT_PERIOD_MS);
btstack_run_loop_add_timer(ts);
}
/* LISTING_END */
/*
* @section Main Application Setup
*
* @text As with the packet and the heartbeat handlers, the combined app setup contains the code from the individual example setups.
*/
/* LISTING_START(MainConfiguration): Init L2CAP RFCOMM SDO SM ATT Server and start heartbeat timer */
int btstack_main(void);
int btstack_main(void)
{
l2cap_init();
rfcomm_init();
rfcomm_register_service(packet_handler, RFCOMM_SERVER_CHANNEL, 0xffff);
// init SDP, create record for SPP and register with SDP
sdp_init();
memset(spp_service_buffer, 0, sizeof(spp_service_buffer));
spp_create_sdp_record(spp_service_buffer, 0x10001, RFCOMM_SERVER_CHANNEL, "SPP Counter");
sdp_register_service(spp_service_buffer);
printf("SDP service record size: %u\n", de_get_len(spp_service_buffer));
#ifdef ENABLE_GATT_OVER_CLASSIC
// init SDP, create record for GATT and register with SDP
memset(gatt_service_buffer, 0, sizeof(gatt_service_buffer));
gatt_create_sdp_record(gatt_service_buffer, 0x10001, ATT_SERVICE_GATT_SERVICE_START_HANDLE, ATT_SERVICE_GATT_SERVICE_END_HANDLE);
sdp_register_service(gatt_service_buffer);
printf("SDP service record size: %u\n", de_get_len(gatt_service_buffer));
#endif
gap_set_local_name("SPP and LE Counter 00:00:00:00:00:00");
gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO);
gap_discoverable_control(1);
// setup le device db
le_device_db_init();
// setup SM: Display only
sm_init();
// setup ATT server
att_server_init(profile_data, att_read_callback, att_write_callback);
// register for HCI events
hci_event_callback_registration.callback = &packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
// register for ATT events
att_server_register_packet_handler(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;
}
/* LISTING_END */
/* EXAMPLE_END */