1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * hsp_hs_demo.c 40 */ 41 42 // ***************************************************************************** 43 /* EXAMPLE_START(hsp_hs_demo): HSP Headset Demo 44 * 45 * @text This example implements a HSP Headset device that sends and receives 46 * audio signal over HCI SCO. It demonstrates how to receive 47 * an output from a remote audio gateway (AG), and, 48 * if HAVE_POSIX_STDIN is defined, how to control the AG. 49 */ 50 // ***************************************************************************** 51 52 #include "btstack_config.h" 53 54 #include <stdint.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <math.h> 59 #include <unistd.h> 60 61 #include "btstack.h" 62 #ifdef HAVE_POSIX_STDIN 63 #include "stdin_support.h" 64 #endif 65 66 #define SCO_REPORT_PERIOD 255 67 68 static btstack_packet_callback_registration_t hci_event_callback_registration; 69 70 static uint8_t hsp_service_buffer[150]; 71 static const uint8_t rfcomm_channel_nr = 1; 72 static const char hsp_hs_service_name[] = "Headset Test"; 73 static hci_con_handle_t sco_handle = 0; 74 75 static char hs_cmd_buffer[100]; 76 static bd_addr_t device_addr = {0x00,0x1b,0xDC,0x07,0x32,0xEF}; 77 78 static int phase = 0; 79 80 // input signal: pre-computed sine wave, 160 Hz 81 static const uint8_t sine[] = { 82 0, 15, 31, 46, 61, 74, 86, 97, 107, 114, 83 120, 124, 126, 126, 124, 120, 114, 107, 97, 86, 84 74, 61, 46, 31, 15, 0, 241, 225, 210, 195, 85 182, 170, 159, 149, 142, 136, 132, 130, 130, 132, 86 136, 142, 149, 159, 170, 182, 195, 210, 225, 241, 87 }; 88 89 /* @section Audio Transfer Setup 90 * 91 * @text A pre-computed sine wave (160Hz) is used as the input audio signal. 160 Hz. 92 * To send and receive an audio signal, HAVE_SCO_OVER_HCI has to be defined. 93 * 94 * Tested working setups: 95 * - Ubuntu 14 64-bit, CC2564B connected via FTDI USB-2-UART adapter, 921600 baud 96 * - Ubuntu 14 64-bit, CSR USB dongle 97 * - OS X 10.11, CSR USB dongle 98 * 99 * Broken setups: 100 * - OS X 10.11, CC2564B connected via FDTI USB-2-UART adapter, 921600 baud 101 * - select(..) blocks > 400 ms -> num completed is received to late -> gaps between audio 102 * - looks like bug in select->FTDI driver as it works correct on Linux 103 * 104 * SCO not routed over HCI yet: 105 * - CSR UART dongle 106 * - Broadcom USB dongle 107 * - Broadcom UART chipset 108 * - .. 109 * 110 */ 111 112 113 static void show_usage(void){ 114 bd_addr_t iut_address; 115 gap_local_bd_addr(iut_address); 116 117 printf("\n--- Bluetooth HSP Headset Test Console %s ---\n", bd_addr_to_str(iut_address)); 118 printf("---\n"); 119 printf("c - Connect to %s\n", bd_addr_to_str(device_addr)); 120 printf("C - Disconnect\n"); 121 printf("a - establish audio connection\n"); 122 printf("A - release audio connection\n"); 123 printf("b - press user button\n"); 124 printf("z - set microphone gain 0\n"); 125 printf("m - set microphone gain 8\n"); 126 printf("M - set microphone gain 15\n"); 127 printf("o - set speaker gain 0\n"); 128 printf("s - set speaker gain 8\n"); 129 printf("S - set speaker gain 15\n"); 130 printf("---\n"); 131 printf("Ctrl-c - exit\n"); 132 printf("---\n"); 133 } 134 135 #ifdef HAVE_POSIX_STDIN 136 static void stdin_process(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type){ 137 char buffer; 138 read(ds->fd, &buffer, 1); 139 140 switch (buffer){ 141 case 'c': 142 printf("Connect to %s\n", bd_addr_to_str(device_addr)); 143 hsp_hs_connect(device_addr); 144 break; 145 case 'C': 146 printf("Disconnect.\n"); 147 hsp_hs_disconnect(); 148 break; 149 case 'a': 150 printf("Establish audio connection\n"); 151 hsp_hs_establish_audio_connection(); 152 break; 153 case 'A': 154 printf("Release audio connection\n"); 155 hsp_hs_release_audio_connection(); 156 break; 157 158 case 'z': 159 printf("Setting microphone gain 0\n"); 160 hsp_hs_set_microphone_gain(0); 161 break; 162 case 'm': 163 printf("Setting microphone gain 8\n"); 164 hsp_hs_set_microphone_gain(8); 165 break; 166 case 'M': 167 printf("Setting microphone gain 15\n"); 168 hsp_hs_set_microphone_gain(15); 169 break; 170 case 'o': 171 printf("Setting speaker gain 0\n"); 172 hsp_hs_set_speaker_gain(0); 173 break; 174 case 's': 175 printf("Setting speaker gain 8\n"); 176 hsp_hs_set_speaker_gain(8); 177 break; 178 case 'S': 179 printf("Setting speaker gain 15\n"); 180 hsp_hs_set_speaker_gain(15); 181 break; 182 case 'b': 183 printf("Press user button\n"); 184 hsp_hs_send_button_press(); 185 break; 186 default: 187 show_usage(); 188 break; 189 } 190 } 191 #endif 192 193 static void send_sco_data(void){ 194 if (!sco_handle) return; 195 196 const int sco_packet_length = hci_get_sco_packet_length(); 197 const int sco_payload_length = sco_packet_length - 3; 198 const int frames_per_packet = sco_payload_length; // for 8-bit data. for 16-bit data it's /2 199 200 hci_reserve_packet_buffer(); 201 uint8_t * sco_packet = hci_get_outgoing_packet_buffer(); 202 // set handle + flags 203 little_endian_store_16(sco_packet, 0, sco_handle); 204 // set len 205 sco_packet[2] = sco_payload_length; 206 int i; 207 for (i=0;i<frames_per_packet;i++){ 208 sco_packet[3+i] = sine[phase]; 209 phase++; 210 if (phase >= sizeof(sine)) phase = 0; 211 } 212 hci_send_sco_packet_buffer(sco_packet_length); 213 214 // request another send event 215 hci_request_sco_can_send_now_event(); 216 217 static int count = 0; 218 count++; 219 if ((count & 15) == 0) printf("Sent %u\n", count); 220 } 221 222 static void sco_packet_handler(uint8_t packet_type, uint8_t * packet, uint16_t size){ 223 static int count = 0; 224 // hexdumpf(packet, size); 225 count++; 226 if ((count & SCO_REPORT_PERIOD)) return; 227 printf("SCO packets %u\n", count); 228 } 229 230 static void packet_handler(uint8_t * event, uint16_t event_size){ 231 switch (event[0]) { 232 case BTSTACK_EVENT_STATE: 233 if (btstack_event_state_get_state(event) != HCI_STATE_WORKING) break; 234 show_usage(); 235 break; 236 case HCI_EVENT_SCO_CAN_SEND_NOW: 237 send_sco_data(); 238 break; 239 case HCI_EVENT_HSP_META: 240 switch (event[2]) { 241 case HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE: 242 if (hsp_subevent_rfcomm_connection_complete_get_status(event)){ 243 printf("RFCOMM connection establishement failed with status %u\n", hsp_subevent_audio_connection_complete_get_handle(event)); 244 } else { 245 printf("RFCOMM connection established.\n"); 246 } 247 break; 248 case HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE: 249 if (hsp_subevent_rfcomm_disconnection_complete_get_status(event)){ 250 printf("RFCOMM disconnection failed with status %u.\n", hsp_subevent_rfcomm_disconnection_complete_get_status(event)); 251 } else { 252 printf("RFCOMM disconnected.\n"); 253 } 254 break; 255 case HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE: 256 if (hsp_subevent_audio_connection_complete_get_status(event)){ 257 printf("Audio connection establishment failed with status %u\n", hsp_subevent_audio_connection_complete_get_status(event)); 258 sco_handle = 0; 259 } else { 260 sco_handle = hsp_subevent_audio_connection_complete_get_handle(event); 261 printf("Audio connection established with SCO handle 0x%04x.\n", sco_handle); 262 hci_request_sco_can_send_now_event(); 263 } 264 break; 265 case HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE: 266 if (hsp_subevent_audio_disconnection_complete_get_status(event)){ 267 printf("Audio connection releasing failed with status %u\n", hsp_subevent_audio_disconnection_complete_get_status(event)); 268 } else { 269 printf("Audio connection released.\n\n"); 270 sco_handle = 0; 271 } 272 break; 273 case HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED: 274 printf("Received microphone gain change %d\n", hsp_subevent_microphone_gain_changed_get_gain(event)); 275 break; 276 case HSP_SUBEVENT_SPEAKER_GAIN_CHANGED: 277 printf("Received speaker gain change %d\n", hsp_subevent_speaker_gain_changed_get_gain(event)); 278 break; 279 case HSP_SUBEVENT_RING: 280 printf("HS: RING RING!\n"); 281 break; 282 case HSP_SUBEVENT_AG_INDICATION: { 283 memset(hs_cmd_buffer, 0, sizeof(hs_cmd_buffer)); 284 int size = hsp_subevent_ag_indication_get_value_length(event); 285 if (size >= sizeof(hs_cmd_buffer)-1){ 286 size = sizeof(hs_cmd_buffer)-1; 287 } 288 memcpy(hs_cmd_buffer, hsp_subevent_ag_indication_get_value(event), size); 289 printf("Received custom indication: \"%s\". \nExit code or call hsp_hs_send_result.\n", hs_cmd_buffer); 290 291 } 292 break; 293 default: 294 printf("event not handled %u\n", event[2]); 295 break; 296 } 297 break; 298 default: 299 break; 300 } 301 } 302 303 static void handle_hci_event(uint8_t packet_type, uint16_t channel, uint8_t * packet, uint16_t size){ 304 packet_handler(packet, size); 305 } 306 307 /* @section Main Application Setup 308 * 309 * @text Listing MainConfiguration shows main application code. 310 * To run a HSP Headset service you need to initialize the SDP, and to create and register HSP HS record with it. 311 * In this example, the SCO over HCI is used to receive and send an audio signal. 312 * 313 * Two packet handlers are registered: 314 * - The HCI SCO packet handler receives audio data. 315 * - The HSP HS packet handler is used to trigger sending of audio data and commands to the AG. It also receives the AG's answers. 316 * 317 * The stdin_process callback allows for sending commands to the AG. 318 * At the end the Bluetooth stack is started. 319 */ 320 321 /* LISTING_START(MainConfiguration): Setup HSP Headset */ 322 int btstack_main(int argc, const char * argv[]); 323 int btstack_main(int argc, const char * argv[]){ 324 325 // register for HCI events 326 hci_event_callback_registration.callback = &handle_hci_event; 327 hci_add_event_handler(&hci_event_callback_registration); 328 hci_register_sco_packet_handler(&sco_packet_handler); 329 330 l2cap_init(); 331 332 sdp_init(); 333 memset(hsp_service_buffer, 0, sizeof(hsp_service_buffer)); 334 hsp_hs_create_sdp_record(hsp_service_buffer, 0x10001, rfcomm_channel_nr, hsp_hs_service_name, 0); 335 sdp_register_service(hsp_service_buffer); 336 337 rfcomm_init(); 338 339 hsp_hs_init(rfcomm_channel_nr); 340 hsp_hs_register_packet_handler(packet_handler); 341 342 #ifdef HAVE_POSIX_STDIN 343 btstack_stdin_setup(stdin_process); 344 #endif 345 346 gap_set_local_name("BTstack HSP HS"); 347 gap_discoverable_control(1); 348 gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO); 349 gap_set_class_of_device(0x240404); 350 351 // turn on! 352 hci_power_control(HCI_POWER_ON); 353 return 0; 354 } 355 /* LISTING_END */ 356 /* EXAMPLE_END */ 357