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_STDIO 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 63 #define SCO_REPORT_PERIOD 255 64 65 static btstack_packet_callback_registration_t hci_event_callback_registration; 66 67 static uint8_t hsp_service_buffer[150]; 68 static const uint8_t rfcomm_channel_nr = 1; 69 static const char hsp_hs_service_name[] = "Headset Test"; 70 static hci_con_handle_t sco_handle = 0; 71 72 static char hs_cmd_buffer[100]; 73 static bd_addr_t device_addr = {0x00,0x1b,0xDC,0x07,0x32,0xEF}; 74 75 static int phase = 0; 76 77 // input signal: pre-computed sine wave, 160 Hz 78 static const uint8_t sine[] = { 79 0, 15, 31, 46, 61, 74, 86, 97, 107, 114, 80 120, 124, 126, 126, 124, 120, 114, 107, 97, 86, 81 74, 61, 46, 31, 15, 0, 241, 225, 210, 195, 82 182, 170, 159, 149, 142, 136, 132, 130, 130, 132, 83 136, 142, 149, 159, 170, 182, 195, 210, 225, 241, 84 }; 85 86 /* @section Audio Transfer Setup 87 * 88 * @text A pre-computed sine wave (160Hz) is used as the input audio signal. 160 Hz. 89 * To send and receive an audio signal, HAVE_SCO_OVER_HCI has to be defined. 90 * 91 * Tested working setups: 92 * - Ubuntu 14 64-bit, CC2564B connected via FTDI USB-2-UART adapter, 921600 baud 93 * - Ubuntu 14 64-bit, CSR USB dongle 94 * - OS X 10.11, CSR USB dongle 95 * 96 * Broken setups: 97 * - OS X 10.11, CC2564B connected via FDTI USB-2-UART adapter, 921600 baud 98 * - select(..) blocks > 400 ms -> num completed is received to late -> gaps between audio 99 * - looks like bug in select->FTDI driver as it works correct on Linux 100 * 101 * SCO not routed over HCI yet: 102 * - CSR UART dongle 103 * - Broadcom USB dongle 104 * - Broadcom UART chipset 105 * - .. 106 * 107 */ 108 109 110 static void show_usage(void){ 111 bd_addr_t iut_address; 112 gap_local_bd_addr(iut_address); 113 114 printf("\n--- Bluetooth HSP Headset Test Console %s ---\n", bd_addr_to_str(iut_address)); 115 printf("---\n"); 116 printf("c - Connect to %s\n", bd_addr_to_str(device_addr)); 117 printf("C - Disconnect\n"); 118 printf("a - establish audio connection\n"); 119 printf("A - release audio connection\n"); 120 printf("b - press user button\n"); 121 printf("z - set microphone gain 0\n"); 122 printf("m - set microphone gain 8\n"); 123 printf("M - set microphone gain 15\n"); 124 printf("o - set speaker gain 0\n"); 125 printf("s - set speaker gain 8\n"); 126 printf("S - set speaker gain 15\n"); 127 printf("---\n"); 128 printf("Ctrl-c - exit\n"); 129 printf("---\n"); 130 } 131 132 #ifdef HAVE_STDIO 133 static int stdin_process(struct data_source *ds){ 134 char buffer; 135 read(ds->fd, &buffer, 1); 136 137 switch (buffer){ 138 case 'c': 139 printf("Connect to %s\n", bd_addr_to_str(device_addr)); 140 hsp_hs_connect(device_addr); 141 break; 142 case 'C': 143 printf("Disconnect.\n"); 144 hsp_hs_disconnect(); 145 break; 146 case 'a': 147 printf("Establish audio connection\n"); 148 hsp_hs_establish_audio_connection(); 149 break; 150 case 'A': 151 printf("Release audio connection\n"); 152 hsp_hs_release_audio_connection(); 153 break; 154 155 case 'z': 156 printf("Setting microphone gain 0\n"); 157 hsp_hs_set_microphone_gain(0); 158 break; 159 case 'm': 160 printf("Setting microphone gain 8\n"); 161 hsp_hs_set_microphone_gain(8); 162 break; 163 case 'M': 164 printf("Setting microphone gain 15\n"); 165 hsp_hs_set_microphone_gain(15); 166 break; 167 case 'o': 168 printf("Setting speaker gain 0\n"); 169 hsp_hs_set_speaker_gain(0); 170 break; 171 case 's': 172 printf("Setting speaker gain 8\n"); 173 hsp_hs_set_speaker_gain(8); 174 break; 175 case 'S': 176 printf("Setting speaker gain 15\n"); 177 hsp_hs_set_speaker_gain(15); 178 break; 179 case 'b': 180 printf("Press user button\n"); 181 hsp_hs_send_button_press(); 182 break; 183 default: 184 show_usage(); 185 break; 186 } 187 return 0; 188 } 189 #endif 190 191 static void try_send_sco(void){ 192 if (!sco_handle) return; 193 194 while (hci_can_send_sco_packet_now()) { 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 static int count = 0; 214 count++; 215 if ((count & 15) == 0) printf("Sent %u\n", count); 216 } 217 } 218 219 static void sco_packet_handler(uint8_t packet_type, uint8_t * packet, uint16_t size){ 220 static int count = 0; 221 // hexdumpf(packet, size); 222 count++; 223 if ((count & SCO_REPORT_PERIOD)) return; 224 printf("SCO packets %u\n", count); 225 } 226 227 static void packet_handler(uint8_t * event, uint16_t event_size){ 228 switch (event[0]) { 229 case BTSTACK_EVENT_STATE: 230 if (btstack_event_state_get_state(event) != HCI_STATE_WORKING) break; 231 show_usage(); 232 break; 233 case HCI_EVENT_SCO_CAN_SEND_NOW: 234 try_send_sco(); 235 break; 236 case HCI_EVENT_HSP_META: 237 switch (event[2]) { 238 case HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE: 239 if (hsp_subevent_audio_connection_complete_get_handle(event) == 0){ 240 printf("RFCOMM connection established.\n"); 241 } else { 242 printf("RFCOMM connection establishement failed.\n"); 243 } 244 break; 245 case HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE: 246 if (hsp_subevent_audio_connection_complete_get_handle(event) == 0){ 247 printf("RFCOMM disconnected.\n"); 248 } else { 249 printf("RFCOMM disconnection failed.\n"); 250 } 251 break; 252 case HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE: 253 if (hsp_subevent_audio_connection_complete_get_handle(event) == 0){ 254 sco_handle = little_endian_read_16(event, 4); 255 printf("Audio connection established with SCO handle 0x%04x.\n", sco_handle); 256 try_send_sco(); 257 } else { 258 printf("Audio connection establishment failed with status %u\n", hsp_subevent_audio_connection_complete_get_status(event)); 259 sco_handle = 0; 260 } 261 break; 262 case HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE: 263 if (event[3] == 0){ 264 printf("Audio connection released.\n\n"); 265 sco_handle = 0; 266 } else { 267 printf("Audio connection releasing failed with status %u\n", event[3]); 268 } 269 break; 270 case HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED: 271 printf("Received microphone gain change %d\n", hsp_subevent_microphone_gain_changed_get_gain(event)); 272 break; 273 case HSP_SUBEVENT_SPEAKER_GAIN_CHANGED: 274 printf("Received speaker gain change %d\n", hsp_subevent_speaker_gain_changed_get_gain(event)); 275 break; 276 case HSP_SUBEVENT_RING: 277 printf("HS: RING RING!\n"); 278 break; 279 case HSP_SUBEVENT_AG_INDICATION: { 280 memset(hs_cmd_buffer, 0, sizeof(hs_cmd_buffer)); 281 int size = hsp_subevent_ag_indication_get_value_length(event); 282 if (size >= sizeof(hs_cmd_buffer)-1){ 283 size = sizeof(hs_cmd_buffer)-1; 284 } 285 memcpy(hs_cmd_buffer, hsp_subevent_ag_indication_get_value(event), size); 286 printf("Received custom indication: \"%s\". \nExit code or call hsp_hs_send_result.\n", hs_cmd_buffer); 287 288 } 289 break; 290 default: 291 printf("event not handled %u\n", event[2]); 292 break; 293 } 294 break; 295 default: 296 break; 297 } 298 } 299 300 static void handle_hci_event(uint8_t packet_type, uint16_t channel, uint8_t * packet, uint16_t size){ 301 packet_handler(packet, size); 302 } 303 304 /* @section Main Application Setup 305 * 306 * @text Listing MainConfiguration shows main application code. 307 * To run a HSP Headset service you need to initialize the SDP, and to create and register HSP HS record with it. 308 * In this example, the SCO over HCI is used to receive and send an audio signal. 309 * 310 * Two packet handlers are registered: 311 * - The HCI SCO packet handler receives audio data. 312 * - 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. 313 * 314 * The stdin_process callback allows for sending commands to the AG. 315 * At the end the Bluetooth stack is started. 316 */ 317 318 /* LISTING_START(MainConfiguration): Setup HSP Headset */ 319 int btstack_main(int argc, const char * argv[]); 320 int btstack_main(int argc, const char * argv[]){ 321 322 // register for HCI events 323 hci_event_callback_registration.callback = &handle_hci_event; 324 hci_add_event_handler(&hci_event_callback_registration); 325 hci_register_sco_packet_handler(&sco_packet_handler); 326 327 l2cap_init(); 328 329 sdp_init(); 330 memset(hsp_service_buffer, 0, sizeof(hsp_service_buffer)); 331 hsp_hs_create_sdp_record(hsp_service_buffer, 0x10001, rfcomm_channel_nr, hsp_hs_service_name, 0); 332 sdp_register_service(hsp_service_buffer); 333 334 rfcomm_init(); 335 336 hsp_hs_init(rfcomm_channel_nr); 337 hsp_hs_register_packet_handler(packet_handler); 338 339 #ifdef HAVE_STDIO 340 btstack_stdin_setup(stdin_process); 341 #endif 342 343 gap_set_local_name("BTstack HSP HS"); 344 gap_discoverable_control(1); 345 gap_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO); 346 gap_set_class_of_device(0x240404); 347 348 // turn on! 349 hci_power_control(HCI_POWER_ON); 350 return 0; 351 } 352 /* LISTING_END */ 353