mirror of
https://github.com/bluekitchen/btstack.git
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230 lines
6.8 KiB
C
230 lines
6.8 KiB
C
/*
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* Copyright (C) 2009 by Matthias Ringwald
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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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*
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* THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD 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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*/
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/*
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* inquiry.c
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*
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* basic inquiry scan with remote name lookup
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*/
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#include <unistd.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/btstack.h>
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#define MAX_DEVICES 10
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struct device {
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bd_addr_t address;
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uint16_t clockOffset;
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uint32_t classOfDevice;
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uint8_t pageScanRepetitionMode;
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uint8_t rssi;
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uint8_t state; // 0 empty, 1 found, 2 remote name tried, 3 remote name found
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};
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#define INQUIRY_INTERVAL 5
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struct device devices[MAX_DEVICES];
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int deviceCount = 0;
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int state = 0;
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int getDeviceIndexForAddress( bd_addr_t addr){
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int j;
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for (j=0; j< deviceCount; j++){
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if (BD_ADDR_CMP(addr, devices[j].address) == 0){
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return j;
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}
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}
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return -1;
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}
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void next(){
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int i;
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int found = 0;
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switch (state) {
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case 0:
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printf("Starting inquiry scan..\n");
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bt_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, INQUIRY_INTERVAL, 0);
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state = 1;
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break;
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case 1:
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for (i=0;i<deviceCount;i++) {
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// remote name request
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if (devices[i].state == 1){
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found = 1;
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devices[i].state = 2;
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printf("Get remote name of ");
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print_bd_addr(devices[i].address);
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printf("...\n");
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bt_send_cmd(&hci_remote_name_request, devices[i].address,
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devices[i].pageScanRepetitionMode, 0, devices[i].clockOffset | 0x8000);
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break;
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}
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}
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if (!found) {
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printf("Queried all devices, restart.\n");
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state = 0;
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next();
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}
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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 packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
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bd_addr_t addr;
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int i;
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int numResponses;
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switch (packet_type){
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case HCI_EVENT_PACKET:
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switch(packet[0]){
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case BTSTACK_EVENT_STATE:
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// bt stack activated, get started - set local name
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if (packet[2] == HCI_STATE_WORKING) {
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bt_send_cmd(&hci_write_inquiry_mode, 0x01); // with RSSI
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next();
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}
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break;
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case HCI_EVENT_COMMAND_COMPLETE:
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if ( COMMAND_COMPLETE_EVENT(packet, hci_write_inquiry_mode) ) {
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next();
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}
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break;
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case HCI_EVENT_INQUIRY_RESULT:
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numResponses = packet[2];
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for (i=0; i<numResponses && deviceCount < MAX_DEVICES;i++){
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bt_flip_addr(addr, &packet[3+i*6]);
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int index = getDeviceIndexForAddress(addr);
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if (index >= 0) continue;
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memcpy(devices[deviceCount].address, addr, 6);
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devices[deviceCount].pageScanRepetitionMode = packet [3 + numResponses*(6) + i*1];
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devices[deviceCount].classOfDevice = READ_BT_24(packet, 3 + numResponses*(6+1+1+1) + i*3);
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devices[deviceCount].clockOffset = READ_BT_16(packet, 3 + numResponses*(6+1+1+1+3) + i*2) & 0x7fff;
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devices[deviceCount].rssi = 0;
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devices[deviceCount].state = 1;
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printf("Device found: ");
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print_bd_addr(addr);
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printf(" with COD: 0x%06x, pageScan %u, clock offset 0x%04x\n", devices[deviceCount].classOfDevice,
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devices[deviceCount].pageScanRepetitionMode, devices[deviceCount].clockOffset);
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deviceCount++;
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}
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break;
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case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:
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numResponses = packet[2];
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for (i=0; i<numResponses && deviceCount < MAX_DEVICES;i++){
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bt_flip_addr(addr, &packet[3+i*6]);
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int index = getDeviceIndexForAddress(addr);
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if (index >= 0) continue;
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memcpy(devices[deviceCount].address, addr, 6);
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devices[deviceCount].pageScanRepetitionMode = packet [3 + numResponses*(6) + i*1];
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devices[deviceCount].classOfDevice = READ_BT_24(packet, 3 + numResponses*(6+1+1) + i*3);
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devices[deviceCount].clockOffset = READ_BT_16(packet, 3 + numResponses*(6+1+1+3) + i*2) & 0x7fff;
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devices[deviceCount].rssi = packet [3 + numResponses*(6+1+1+3+2) + i*1];
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devices[deviceCount].state = 1;
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printf("Device found: ");
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print_bd_addr(addr);
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printf(" with COD: 0x%06x, pageScan %u, clock offset 0x%04x, rssi 0x%02x\n", devices[deviceCount].classOfDevice,
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devices[deviceCount].pageScanRepetitionMode, devices[deviceCount].clockOffset, devices[deviceCount].rssi);
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deviceCount++;
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}
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break;
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case BTSTACK_EVENT_REMOTE_NAME_CACHED:
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bt_flip_addr(addr, &packet[3]);
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printf("Cached remote name for ");
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print_bd_addr(addr);
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printf(": %s\n", &packet[9]);
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break;
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case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE:
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bt_flip_addr(addr, &packet[3]);
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int index = getDeviceIndexForAddress(addr);
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if (index >= 0) {
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if (packet[2] == 0) {
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printf("Name: '%s'\n", &packet[9]);
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devices[index].state = 3;
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} else {
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printf("Failed to get name: page timeout\n");
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}
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}
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next();
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break;
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case HCI_EVENT_INQUIRY_COMPLETE:
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printf("Inquiry scan done.\n");
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for (i=0;i<deviceCount;i++) {
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// retry remote name request
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if (devices[i].state == 2)
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devices[i].state = 1;
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}
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next();
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break;
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default:
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break;
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}
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default:
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break;
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}
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}
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int main (int argc, const char * argv[]){
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// start stack
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run_loop_init(RUN_LOOP_POSIX);
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int err = bt_open();
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if (err) {
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printf("Failed to open connection to BTdaemon\n");
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return err;
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}
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// init table
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int i; for (i=0;i<MAX_DEVICES;i++) devices[i].state = 0;
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bt_register_packet_handler(packet_handler);
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bt_send_cmd(&btstack_set_power_mode, HCI_POWER_ON );
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run_loop_execute();
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bt_close();
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} |