/*
* 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_streamer_client.c"
/*
* spp_streamer_client.c
*/
// *****************************************************************************
/* EXAMPLE_START(spp_streamer_client): Client for SPP Streamer
*
* @text Note: The SPP Streamer Client scans for and connects to SPP Streamer,
* and measures the throughput.
*/
// *****************************************************************************
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "btstack.h"
#define RFCOMM_SERVER_CHANNEL 1
#define TEST_COD 0x1234
typedef enum {
// SPP
W4_PEER_COD,
W4_SCAN_COMPLETE,
W4_SDP_RESULT,
W4_SDP_COMPLETE,
W4_RFCOMM_CHANNEL,
SENDING,
DONE
} state_t;
static btstack_packet_callback_registration_t hci_event_callback_registration;
static bd_addr_t peer_addr;
static state_t state;;
// SPP
static uint16_t rfcomm_mtu;
static uint16_t rfcomm_cid = 0;
// static uint32_t data_to_send = DATA_VOLUME;
/**
* Find remote peer by COD
*/
#define INQUIRY_INTERVAL 5
static void start_scan(void){
printf("Starting inquiry scan..\n");
state = W4_PEER_COD;
gap_inquiry_start(INQUIRY_INTERVAL);
}
static void stop_scan(void){
printf("Stopping inquiry scan..\n");
state = W4_SCAN_COMPLETE;
gap_inquiry_stop();
}
/*
* @section Track throughput
* @text We calculate the throughput by setting a start time and measuring the amount of
* data sent. After a configurable REPORT_INTERVAL_MS, we print the throughput in kB/s
* and reset the counter and start time.
*/
/* LISTING_START(tracking): Tracking throughput */
#define REPORT_INTERVAL_MS 3000
static uint32_t test_data_transferred;
static uint32_t test_data_start;
static void test_reset(void){
test_data_start = btstack_run_loop_get_time_ms();
test_data_transferred = 0;
}
static void test_track_transferred(int bytes_sent){
test_data_transferred += bytes_sent;
// evaluate
uint32_t now = btstack_run_loop_get_time_ms();
uint32_t time_passed = now - test_data_start;
if (time_passed < REPORT_INTERVAL_MS) return;
// print speed
int bytes_per_second = test_data_transferred * 1000 / time_passed;
printf("%u bytes -> %u.%03u kB/s\n", (int) test_data_transferred, (int) bytes_per_second / 1000, bytes_per_second % 1000);
// restart
test_data_start = now;
test_data_transferred = 0;
}
/* LISTING_END(tracking): Tracking throughput */
/*
* @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;
uint32_t class_of_device;
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 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_cid = 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_cid);
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_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet);
rfcomm_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_cid, rfcomm_mtu);
test_reset();
// disable page/inquiry scan to get max performance
gap_discoverable_control(0);
gap_connectable_control(0);
}
break;
case RFCOMM_EVENT_CHANNEL_CLOSED:
printf("RFCOMM channel closed\n");
rfcomm_cid = 0;
// re-enable page/inquiry scan again
gap_discoverable_control(1);
gap_connectable_control(1);
break;
case BTSTACK_EVENT_STATE:
if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) return;
start_scan();
break;
case GAP_EVENT_INQUIRY_RESULT:
if (state != W4_PEER_COD) break;
class_of_device = gap_event_inquiry_result_get_class_of_device(packet);
gap_event_inquiry_result_get_bd_addr(packet, event_addr);
if (class_of_device == TEST_COD){
memcpy(peer_addr, event_addr, 6);
printf("Peer found: %s\n", bd_addr_to_str(peer_addr));
stop_scan();
} else {
printf("Device found: %s with COD: 0x%06x\n", bd_addr_to_str(event_addr), (int) class_of_device);
}
break;
case GAP_EVENT_INQUIRY_COMPLETE:
switch (state){
case W4_PEER_COD:
printf("Inquiry complete\n");
printf("Peer not found, starting scan again\n");
start_scan();
break;
case W4_SCAN_COMPLETE:
printf("Start to connect\n");
state = W4_RFCOMM_CHANNEL;
rfcomm_create_channel(packet_handler, peer_addr, RFCOMM_SERVER_CHANNEL, NULL);
break;
default:
break;
}
if (state == W4_PEER_COD){
}
break;
default:
break;
}
break;
case RFCOMM_DATA_PACKET:
test_track_transferred(size);
#if 0
printf("RCV: '");
for (i=0;i<size;i++){
putchar(packet[i]);
}
printf("'\n");
#endif
break;
default:
break;
}
}
/*
* @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(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
UNUSED(argc);
(void)argv;
// register for HCI events
hci_event_callback_registration.callback = &packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
l2cap_init();
rfcomm_init();
rfcomm_register_service(packet_handler, RFCOMM_SERVER_CHANNEL, 0xffff);
// init SDP
gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO);
// turn on!
hci_power_control(HCI_POWER_ON);
return 0;
}
/* LISTING_END */
/* EXAMPLE_END */