1 /* 2 * Copyright (C) 2017 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 BLUEKITCHEN 24 * GMBH 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 #define BTSTACK_FILE__ "hog_mouse_demo.c" 39 40 // ***************************************************************************** 41 /* EXAMPLE_START(hog_mouse_demo): HID Mouse LE 42 */ 43 // ***************************************************************************** 44 45 #include <stdint.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <inttypes.h> 50 51 #include "hog_mouse_demo.h" 52 53 #include "btstack.h" 54 55 #include "ble/gatt-service/battery_service_server.h" 56 #include "ble/gatt-service/device_information_service_server.h" 57 #include "ble/gatt-service/hids_device.h" 58 59 // from USB HID Specification 1.1, Appendix B.2 60 const uint8_t hid_descriptor_mouse_boot_mode[] = { 61 0x05, 0x01, // USAGE_PAGE (Generic Desktop) 62 0x09, 0x02, // USAGE (Mouse) 63 0xa1, 0x01, // COLLECTION (Application) 64 65 0x85, 0x01, // Report ID 1 66 67 0x09, 0x01, // USAGE (Pointer) 68 69 0xa1, 0x00, // COLLECTION (Physical) 70 71 #if 1 72 0x05, 0x09, // USAGE_PAGE (Button) 73 0x19, 0x01, // USAGE_MINIMUM (Button 1) 74 0x29, 0x03, // USAGE_MAXIMUM (Button 3) 75 0x15, 0x00, // LOGICAL_MINIMUM (0) 76 0x25, 0x01, // LOGICAL_MAXIMUM (1) 77 0x95, 0x03, // REPORT_COUNT (3) 78 0x75, 0x01, // REPORT_SIZE (1) 79 0x81, 0x02, // INPUT (Data,Var,Abs) 80 0x95, 0x01, // REPORT_COUNT (1) 81 0x75, 0x05, // REPORT_SIZE (5) 82 0x81, 0x03, // INPUT (Cnst,Var,Abs) 83 #endif 84 85 #if 1 86 0x05, 0x01, // USAGE_PAGE (Generic Desktop) 87 0x09, 0x30, // USAGE (X) 88 0x09, 0x31, // USAGE (Y) 89 0x15, 0x81, // LOGICAL_MINIMUM (-127) 90 0x25, 0x7f, // LOGICAL_MAXIMUM (127) 91 0x75, 0x08, // REPORT_SIZE (8) 92 0x95, 0x02, // REPORT_COUNT (2) 93 0x81, 0x06, // INPUT (Data,Var,Rel) 94 #endif 95 96 0xc0, // END_COLLECTION 97 0xc0 // END_COLLECTION 98 }; 99 100 static btstack_packet_callback_registration_t hci_event_callback_registration; 101 static btstack_packet_callback_registration_t l2cap_event_callback_registration; 102 static btstack_packet_callback_registration_t sm_event_callback_registration; 103 static uint8_t battery = 100; 104 static hci_con_handle_t con_handle = HCI_CON_HANDLE_INVALID; 105 static uint8_t protocol_mode = 1; 106 107 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 108 109 const uint8_t adv_data[] = { 110 // Flags general discoverable, BR/EDR not supported 111 0x02, BLUETOOTH_DATA_TYPE_FLAGS, 0x06, 112 // Name 113 0x0a, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, 'H', 'I', 'D', ' ', 'M', 'o', 'u', 's', 'e', 114 // 16-bit Service UUIDs 115 0x03, BLUETOOTH_DATA_TYPE_COMPLETE_LIST_OF_16_BIT_SERVICE_CLASS_UUIDS, ORG_BLUETOOTH_SERVICE_HUMAN_INTERFACE_DEVICE & 0xff, ORG_BLUETOOTH_SERVICE_HUMAN_INTERFACE_DEVICE >> 8, 116 // Appearance HID - Mouse (Category 15, Sub-Category 2) 117 0x03, BLUETOOTH_DATA_TYPE_APPEARANCE, 0xC2, 0x03, 118 }; 119 const uint8_t adv_data_len = sizeof(adv_data); 120 121 static void hog_mouse_setup(void){ 122 123 // setup l2cap and 124 l2cap_init(); 125 126 // setup SM: Display only 127 sm_init(); 128 sm_set_io_capabilities(IO_CAPABILITY_NO_INPUT_NO_OUTPUT); 129 sm_set_authentication_requirements(SM_AUTHREQ_SECURE_CONNECTION | SM_AUTHREQ_BONDING); 130 131 // setup ATT server 132 att_server_init(profile_data, NULL, NULL); 133 134 // setup battery service 135 battery_service_server_init(battery); 136 137 // setup device information service 138 device_information_service_server_init(); 139 140 // setup HID Device service 141 hids_device_init(0, hid_descriptor_mouse_boot_mode, sizeof(hid_descriptor_mouse_boot_mode)); 142 143 // setup advertisements 144 uint16_t adv_int_min = 0x0030; 145 uint16_t adv_int_max = 0x0030; 146 uint8_t adv_type = 0; 147 bd_addr_t null_addr; 148 memset(null_addr, 0, 6); 149 gap_advertisements_set_params(adv_int_min, adv_int_max, adv_type, 0, null_addr, 0x07, 0x00); 150 gap_advertisements_set_data(adv_data_len, (uint8_t*) adv_data); 151 gap_advertisements_enable(1); 152 153 // register for events 154 hci_event_callback_registration.callback = &packet_handler; 155 hci_add_event_handler(&hci_event_callback_registration); 156 157 // register for connection parameter updates 158 l2cap_event_callback_registration.callback = &packet_handler; 159 l2cap_add_event_handler(&l2cap_event_callback_registration); 160 161 sm_event_callback_registration.callback = &packet_handler; 162 sm_add_event_handler(&sm_event_callback_registration); 163 164 hids_device_register_packet_handler(packet_handler); 165 } 166 167 // HID Report sending 168 static void send_report(uint8_t buttons, int8_t dx, int8_t dy){ 169 uint8_t report[] = { buttons, (uint8_t) dx, (uint8_t) dy }; 170 switch (protocol_mode){ 171 case 0: 172 hids_device_send_boot_mouse_input_report(con_handle, report, sizeof(report)); 173 break; 174 case 1: 175 hids_device_send_input_report(con_handle, report, sizeof(report)); 176 break; 177 default: 178 break; 179 } 180 printf("Mouse: %d/%d - buttons: %02x\n", dx, dy, buttons); 181 } 182 183 static int dx; 184 static int dy; 185 static uint8_t buttons; 186 187 static void mousing_can_send_now(void){ 188 send_report(buttons, dx, dy); 189 // reset 190 dx = 0; 191 dy = 0; 192 if (buttons){ 193 buttons = 0; 194 hids_device_request_can_send_now_event(con_handle); 195 } 196 } 197 198 // Demo Application 199 200 #ifdef HAVE_BTSTACK_STDIN 201 202 static const int MOUSE_SPEED = 30; 203 204 // On systems with STDIN, we can directly type on the console 205 206 static void stdin_process(char character){ 207 208 if (con_handle == HCI_CON_HANDLE_INVALID) { 209 printf("Mouse not connected, ignoring '%c'\n", character); 210 return; 211 } 212 213 switch (character){ 214 case 'a': 215 dx -= MOUSE_SPEED; 216 break; 217 case 's': 218 dy += MOUSE_SPEED; 219 break; 220 case 'd': 221 dx += MOUSE_SPEED; 222 break; 223 case 'w': 224 dy -= MOUSE_SPEED; 225 break; 226 case 'l': 227 buttons |= 1; 228 break; 229 case 'r': 230 buttons |= 2; 231 break; 232 default: 233 return; 234 } 235 hids_device_request_can_send_now_event(con_handle); 236 } 237 238 #else 239 240 // On embedded systems, simulate clicking on 4 corners of a square 241 242 #define MOUSE_PERIOD_MS 15 243 244 static const int STEPS_PER_DIRECTION = 50; 245 static const int MOUSE_SPEED = 10; 246 247 static btstack_timer_source_t mousing_timer; 248 static int mousing_active = 0; 249 static int step; 250 251 static struct { 252 int dx; 253 int dy; 254 } directions[] = { 255 { 1, 0 }, 256 { 0, 1 }, 257 { -1, 0 }, 258 { 0, -1 }, 259 }; 260 261 262 static void mousing_timer_handler(btstack_timer_source_t * ts){ 263 264 if (con_handle == HCI_CON_HANDLE_INVALID) { 265 mousing_active = 0; 266 return; 267 } 268 269 // simulate left click when corner reached 270 if (step % STEPS_PER_DIRECTION == 0){ 271 buttons |= 1; 272 } 273 // simulate move 274 int direction_index = step / STEPS_PER_DIRECTION; 275 dx += directions[direction_index].dx * MOUSE_SPEED; 276 dy += directions[direction_index].dy * MOUSE_SPEED; 277 278 // next 279 step++; 280 if (step >= STEPS_PER_DIRECTION * 4) { 281 step = 0; 282 } 283 284 // trigger send 285 hids_device_request_can_send_now_event(con_handle); 286 287 // set next timer 288 btstack_run_loop_set_timer(ts, MOUSE_PERIOD_MS); 289 btstack_run_loop_add_timer(ts); 290 } 291 292 static void hid_embedded_start_mousing(void){ 293 if (mousing_active) return; 294 mousing_active = 1; 295 296 printf("Start mousing..\n"); 297 298 step = 0; 299 300 // set one-shot timer 301 mousing_timer.process = &mousing_timer_handler; 302 btstack_run_loop_set_timer(&mousing_timer, MOUSE_PERIOD_MS); 303 btstack_run_loop_add_timer(&mousing_timer); 304 } 305 #endif 306 307 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 308 UNUSED(channel); 309 UNUSED(size); 310 uint16_t conn_interval; 311 312 if (packet_type != HCI_EVENT_PACKET) return; 313 314 switch (hci_event_packet_get_type(packet)) { 315 case HCI_EVENT_DISCONNECTION_COMPLETE: 316 con_handle = HCI_CON_HANDLE_INVALID; 317 printf("Disconnected\n"); 318 break; 319 case SM_EVENT_JUST_WORKS_REQUEST: 320 printf("Just Works requested\n"); 321 sm_just_works_confirm(sm_event_just_works_request_get_handle(packet)); 322 break; 323 case SM_EVENT_NUMERIC_COMPARISON_REQUEST: 324 printf("Confirming numeric comparison: %"PRIu32"\n", sm_event_numeric_comparison_request_get_passkey(packet)); 325 sm_numeric_comparison_confirm(sm_event_passkey_display_number_get_handle(packet)); 326 break; 327 case SM_EVENT_PASSKEY_DISPLAY_NUMBER: 328 printf("Display Passkey: %"PRIu32"\n", sm_event_passkey_display_number_get_passkey(packet)); 329 break; 330 case L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_RESPONSE: 331 printf("L2CAP Connection Parameter Update Complete, response: %x\n", l2cap_event_connection_parameter_update_response_get_result(packet)); 332 break; 333 case HCI_EVENT_META_GAP: 334 switch (hci_event_gap_meta_get_subevent_code(packet)) { 335 case GAP_SUBEVENT_LE_CONNECTION_COMPLETE: 336 // print connection parameters (without using float operations) 337 conn_interval = gap_subevent_le_connection_complete_get_conn_interval(packet); 338 printf("LE Connection Complete:\n"); 339 printf("- Connection Interval: %u.%02u ms\n", conn_interval * 125 / 100, 25 * (conn_interval & 3)); 340 printf("- Connection Latency: %u\n", gap_subevent_le_connection_complete_get_conn_latency(packet)); 341 break; 342 default: 343 break; 344 } 345 break; 346 case HCI_EVENT_LE_META: 347 switch (hci_event_le_meta_get_subevent_code(packet)) { 348 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 349 // print connection parameters (without using float operations) 350 conn_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 351 printf("LE Connection Update:\n"); 352 printf("- Connection Interval: %u.%02u ms\n", conn_interval * 125 / 100, 25 * (conn_interval & 3)); 353 printf("- Connection Latency: %u\n", hci_subevent_le_connection_update_complete_get_conn_latency(packet)); 354 break; 355 default: 356 break; 357 } 358 break; 359 case HCI_EVENT_HIDS_META: 360 switch (hci_event_hids_meta_get_subevent_code(packet)){ 361 case HIDS_SUBEVENT_INPUT_REPORT_ENABLE: 362 con_handle = hids_subevent_input_report_enable_get_con_handle(packet); 363 printf("Report Characteristic Subscribed %u\n", hids_subevent_input_report_enable_get_enable(packet)); 364 #ifndef HAVE_BTSTACK_STDIN 365 hid_embedded_start_mousing(); 366 #endif 367 // request connection param update via L2CAP following Apple Bluetooth Design Guidelines 368 // gap_request_connection_parameter_update(con_handle, 12, 12, 4, 100); // 15 ms, 4, 1s 369 370 // directly update connection params via HCI following Apple Bluetooth Design Guidelines 371 // gap_update_connection_parameters(con_handle, 12, 12, 4, 100); // 60-75 ms, 4, 1s 372 373 break; 374 case HIDS_SUBEVENT_BOOT_KEYBOARD_INPUT_REPORT_ENABLE: 375 con_handle = hids_subevent_boot_keyboard_input_report_enable_get_con_handle(packet); 376 printf("Boot Keyboard Characteristic Subscribed %u\n", hids_subevent_boot_keyboard_input_report_enable_get_enable(packet)); 377 break; 378 case HIDS_SUBEVENT_BOOT_MOUSE_INPUT_REPORT_ENABLE: 379 con_handle = hids_subevent_boot_mouse_input_report_enable_get_con_handle(packet); 380 printf("Boot Mouse Characteristic Subscribed %u\n", hids_subevent_boot_mouse_input_report_enable_get_enable(packet)); 381 break; 382 case HIDS_SUBEVENT_PROTOCOL_MODE: 383 protocol_mode = hids_subevent_protocol_mode_get_protocol_mode(packet); 384 printf("Protocol Mode: %s mode\n", hids_subevent_protocol_mode_get_protocol_mode(packet) ? "Report" : "Boot"); 385 break; 386 case HIDS_SUBEVENT_CAN_SEND_NOW: 387 mousing_can_send_now(); 388 break; 389 default: 390 break; 391 } 392 break; 393 394 default: 395 break; 396 } 397 } 398 399 int btstack_main(void); 400 int btstack_main(void) 401 { 402 hog_mouse_setup(); 403 404 #ifdef HAVE_BTSTACK_STDIN 405 btstack_stdin_setup(stdin_process); 406 #endif 407 408 // turn on! 409 hci_power_control(HCI_POWER_ON); 410 411 return 0; 412 } 413