mirror of
https://github.com/bluekitchen/btstack.git
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255 lines
9.9 KiB
C
255 lines
9.9 KiB
C
/*
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* Copyright (C) 2014 BlueKitchen GmbH
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* 4. Any redistribution, use, or modification is done solely for
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* personal benefit and not for any commercial purpose or for
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* monetary gain.
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*
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* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
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* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Please inquire about commercial licensing options at
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* contact@bluekitchen-gmbh.com
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*
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*/
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// *****************************************************************************
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//
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// Minimal setup for HSP Audio Gateway
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//
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// *****************************************************************************
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#include "btstack-config.h"
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <btstack/hci_cmds.h>
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#include <btstack/run_loop.h>
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#include "hci.h"
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#include "btstack_memory.h"
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#include "hci_dump.h"
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#include "l2cap.h"
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#include "sdp_query_rfcomm.h"
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#include "debug.h"
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static bd_addr_t remote = {0x00, 0x21, 0x3C, 0xAC, 0xF7, 0x38};
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static uint8_t channel_nr = 0;
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static uint16_t mtu;
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static uint16_t rfcomm_cid = 0;
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static uint8_t connection_state = 0;
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// remote audio volume control
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static void hsp_set_microphone_gain(){}; // +VGM=13 [0..15]
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static void hsp_set_speaker_gain(){}; // +VGS=5 [0..15]
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static void send_str_over_rfcomm(uint16_t cid, char * command){
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printf("Send %s.\n", command);
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int err = rfcomm_send_internal(cid, (uint8_t*) command, strlen(command));
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if (err){
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printf("rfcomm_send_internal -> error 0X%02x", err);
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}
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}
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static void send_packet(){
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switch (connection_state){
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case 1:
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send_str_over_rfcomm(rfcomm_cid, "\r\nRING\r\n");
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connection_state++;
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break;
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case 3:
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send_str_over_rfcomm(rfcomm_cid, "\r\nOK\r\n");
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connection_state++;
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break;
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default:
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break;
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}
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}
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static void packet_handler (void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
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// printf("packet_handler type %u, packet[0] %x\n", packet_type, packet[0]);
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if (packet_type == RFCOMM_DATA_PACKET){
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if (strncmp((char *)packet, "AT+CKPD", 7) == 0){
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printf("Received AT+CKPD\n");
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connection_state++;
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if (rfcomm_can_send_packet_now(rfcomm_cid)) send_packet();
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}
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return;
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}
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if (packet_type != HCI_EVENT_PACKET) return;
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uint8_t event = packet[0];
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bd_addr_t event_addr;
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uint16_t handle;
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switch (event) {
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case BTSTACK_EVENT_STATE:
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// bt stack activated, get started
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if (packet[2] == HCI_STATE_WORKING){
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printf("Start SDP RFCOMM Query for UUID 0x%02x\n", SDP_HSP);
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sdp_query_rfcomm_channel_and_name_for_uuid(remote, SDP_HSP);
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}
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break;
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case HCI_EVENT_PIN_CODE_REQUEST:
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// inform about pin code request
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printf("Pin code request - using '0000'\n\r");
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bt_flip_addr(event_addr, &packet[2]);
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hci_send_cmd(&hci_pin_code_request_reply, &event_addr, 4, "0000");
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break;
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case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{
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int index = 2;
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uint8_t status = packet[index++];
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uint16_t connection_handle = READ_BT_16(packet, index);
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index+=2;
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bd_addr_t address;
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memcpy(address, &packet[index], 6);
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index+=6;
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uint8_t link_type = packet[index++];
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uint8_t transmission_interval = packet[index++]; // measured in slots
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uint8_t retransmission_interval = packet[index++];// measured in slots
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uint16_t rx_packet_length = READ_BT_16(packet, index); // measured in bytes
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index+=2;
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uint16_t tx_packet_length = READ_BT_16(packet, index); // measured in bytes
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index+=2;
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uint8_t air_mode = packet[index];
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if (status != 0){
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log_error("(e)SCO Connection is not established, status %u", status);
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exit(0);
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break;
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}
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switch (link_type){
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case 0x00:
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printf("SCO Connection established. \n");
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if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval);
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if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval);
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if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length);
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if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length);
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break;
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case 0x02:
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printf("eSCO Connection established. \n");
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break;
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default:
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log_error("(e)SCO reserved link_type 0x%2x", link_type);
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break;
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}
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log_info("connection_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, "
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" rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", connection_handle,
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bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode);
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// Send "RING"
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connection_state++;
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if (rfcomm_can_send_packet_now(rfcomm_cid)) send_packet();
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break;
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}
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case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE:
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printf("RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE packet_handler type %u, packet[0] %x\n", packet_type, packet[0]);
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// data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16)
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if (packet[2]) {
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printf("RFCOMM channel open failed, status %u\n", packet[2]);
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} else {
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// data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16)
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handle = READ_BT_16(packet, 9);
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rfcomm_cid = READ_BT_16(packet, 12);
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mtu = READ_BT_16(packet, 14);
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printf("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u\n", rfcomm_cid, mtu);
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hci_send_cmd(&hci_setup_synchronous_connection_command, handle, 8000, 8000, 0xFFFF, 0x0060, 0xFF, 0x003F);
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/**
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* @param handle
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* @param transmit_bandwidth = 8000 (64kbps)
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* @param receive_bandwidth = 8000 (64kbps)
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* @param max_latency >= 7ms for eSCO, 0xFFFF do not care
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* @param voice_settings = CVSD, Input Coding: Linear, Input Data Format: 2’s complement, data 16bit: 00011000000 == 0x60
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* @param retransmission_effort = 0xFF do not care
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* @param packet_type = at least EV3 for eSCO; here we have 0x3F = {HV1-3, EV3-5}
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*/
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break;
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}
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break;
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case DAEMON_EVENT_HCI_PACKET_SENT:
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case RFCOMM_EVENT_CREDITS:
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if (!rfcomm_cid) break;
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if (rfcomm_can_send_packet_now(rfcomm_cid)) send_packet();
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break;
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default:
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break;
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}
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}
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void handle_query_rfcomm_event(sdp_query_event_t * event, void * context){
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sdp_query_rfcomm_service_event_t * ve;
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sdp_query_complete_event_t * ce;
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switch (event->type){
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case SDP_QUERY_RFCOMM_SERVICE:
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ve = (sdp_query_rfcomm_service_event_t*) event;
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channel_nr = ve->channel_nr;
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printf("** Service name: '%s', RFCOMM port %u\n", ve->service_name, channel_nr);
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break;
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case SDP_QUERY_COMPLETE:
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ce = (sdp_query_complete_event_t*) event;
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if (channel_nr > 0) {
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printf("RFCOMM create channel.\n");
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rfcomm_create_channel_internal(NULL, &remote, channel_nr);
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break;
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}
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printf("Service not found.\n");
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exit(0);
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break;
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}
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}
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int btstack_main(int argc, const char * argv[]);
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int btstack_main(int argc, const char * argv[]){
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printf("Client HCI init done\r\n");
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// init L2CAP
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l2cap_init();
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l2cap_register_packet_handler(packet_handler);
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rfcomm_init();
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rfcomm_register_packet_handler(packet_handler);
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sdp_query_rfcomm_register_callback(handle_query_rfcomm_event, NULL);
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// turn on!
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hci_power_control(HCI_POWER_ON);
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// go!
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run_loop_execute();
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return 0;
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}
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