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 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__ "hids_device.c" 39 40 /** 41 * Implementation of the GATT HIDS Device 42 * To use with your application, add '#import <hids.gatt>' to your .gatt file 43 */ 44 45 #include "hids_device.h" 46 47 #include "ble/att_db.h" 48 #include "ble/att_server.h" 49 #include "bluetooth_gatt.h" 50 #include "btstack_util.h" 51 #include "btstack_debug.h" 52 53 #define HIDS_DEVICE_ERROR_CODE_INAPPROPRIATE_CONNECTION_PARAMETERS 0x80 54 55 // storage for 'generic' HID Device with single Input, Output, and Feature Report 56 static hids_device_report_t hid_reports_generic_storage[3]; 57 58 typedef struct{ 59 uint16_t con_handle; 60 61 uint8_t hid_country_code; 62 const uint8_t * hid_descriptor; 63 uint16_t hid_descriptor_size; 64 65 uint16_t hid_report_map_handle; 66 uint8_t hid_protocol_mode; 67 uint16_t hid_protocol_mode_value_handle; 68 69 uint16_t hid_boot_mouse_input_value_handle; 70 uint16_t hid_boot_mouse_input_client_configuration_handle; 71 uint16_t hid_boot_mouse_input_client_configuration_value; 72 73 uint16_t hid_boot_keyboard_input_value_handle; 74 uint16_t hid_boot_keyboard_input_client_configuration_handle; 75 uint16_t hid_boot_keyboard_input_client_configuration_value; 76 77 hids_device_report_t * hid_reports; 78 79 uint8_t hid_input_reports_num; 80 uint8_t hid_output_reports_num; 81 uint8_t hid_feature_reports_num; 82 83 uint16_t hid_control_point_value_handle; 84 uint8_t hid_control_point_suspend; 85 86 btstack_context_callback_registration_t battery_callback; 87 } hids_device_t; 88 89 static hids_device_t hids_device; 90 91 static btstack_packet_handler_t packet_handler; 92 static att_service_handler_t hid_service; 93 94 // TODO: store hids device connection into list 95 static hids_device_t * hids_device_get_instance_for_con_handle(uint16_t con_handle){ 96 UNUSED(con_handle); 97 return &hids_device; 98 } 99 100 static hids_device_t * hids_device_create_instance(void){ 101 memset(&hids_device, 0, sizeof(hids_device_t)); 102 return &hids_device; 103 } 104 105 static hids_device_report_t * hids_device_get_report_for_client_configuration_handle(hids_device_t * device, uint16_t client_configuration_handle){ 106 uint8_t pos = 0; 107 while (pos < (device->hid_input_reports_num + device->hid_output_reports_num + device->hid_feature_reports_num)){ 108 if (device->hid_reports[pos].client_configuration_handle == client_configuration_handle){ 109 return &device->hid_reports[pos]; 110 } 111 } 112 return NULL; 113 } 114 115 static hids_device_report_t * hids_device_get_report_for_id(hids_device_t * device, uint16_t report_id){ 116 uint8_t pos = 0; 117 while (pos < (device->hid_input_reports_num + device->hid_output_reports_num + device->hid_feature_reports_num)){ 118 if (device->hid_reports[pos].id == report_id){ 119 return &device->hid_reports[pos]; 120 } 121 } 122 return NULL; 123 } 124 125 static void hids_device_emit_event_with_uint8(uint8_t event, hci_con_handle_t con_handle, uint8_t value){ 126 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 127 if (!instance){ 128 log_error("no instance for handle 0x%02x", con_handle); 129 return; 130 } 131 132 if (!packet_handler) return; 133 uint8_t buffer[6]; 134 buffer[0] = HCI_EVENT_HIDS_META; 135 buffer[1] = 4; 136 buffer[2] = event; 137 little_endian_store_16(buffer, 3, (uint16_t) con_handle); 138 buffer[5] = value; 139 (*packet_handler)(HCI_EVENT_PACKET, 0, buffer, sizeof(buffer)); 140 } 141 142 static void hids_device_emit_event(uint8_t event, hci_con_handle_t con_handle){ 143 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 144 if (!instance){ 145 log_error("no instance for handle 0x%02x", con_handle); 146 return; 147 } 148 149 if (!packet_handler) return; 150 uint8_t buffer[5]; 151 buffer[0] = HCI_EVENT_HIDS_META; 152 buffer[1] = 4; 153 buffer[2] = event; 154 little_endian_store_16(buffer, 3, (uint16_t) con_handle); 155 (*packet_handler)(HCI_EVENT_PACKET, 0, buffer, sizeof(buffer)); 156 } 157 158 static void hids_device_can_send_now(void * context){ 159 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) context; 160 // notify client 161 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 162 if (!instance){ 163 log_error("no instance for handle 0x%02x", con_handle); 164 return; 165 } 166 167 if (!packet_handler) return; 168 uint8_t buffer[5]; 169 buffer[0] = HCI_EVENT_HIDS_META; 170 buffer[1] = 3; 171 buffer[2] = HIDS_SUBEVENT_CAN_SEND_NOW; 172 little_endian_store_16(buffer, 3, (uint16_t) con_handle); 173 (*packet_handler)(HCI_EVENT_PACKET, 0, buffer, sizeof(buffer)); 174 } 175 176 // ATT Client Read Callback for Dynamic Data 177 // - if buffer == NULL, don't copy data, just return size of value 178 // - if buffer != NULL, copy data and return number bytes copied 179 static uint16_t att_read_callback(hci_con_handle_t con_handle, uint16_t att_handle, uint16_t offset, uint8_t * buffer, uint16_t buffer_size){ 180 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 181 if (!instance){ 182 log_error("no instance for handle 0x%02x", con_handle); 183 return HIDS_DEVICE_ERROR_CODE_INAPPROPRIATE_CONNECTION_PARAMETERS; 184 } 185 186 if (att_handle == instance->hid_protocol_mode_value_handle){ 187 log_info("Read protocol mode"); 188 return att_read_callback_handle_byte(instance->hid_protocol_mode, offset, buffer, buffer_size); 189 } 190 191 if (att_handle == instance->hid_report_map_handle){ 192 log_info("Read report map"); 193 return att_read_callback_handle_blob(instance->hid_descriptor, instance->hid_descriptor_size, offset, buffer, buffer_size); 194 } 195 196 if (att_handle == instance->hid_boot_mouse_input_client_configuration_handle){ 197 return att_read_callback_handle_little_endian_16(instance->hid_boot_mouse_input_client_configuration_value, offset, buffer, buffer_size); 198 } 199 200 if (att_handle == instance->hid_boot_keyboard_input_client_configuration_handle){ 201 return att_read_callback_handle_little_endian_16(instance->hid_boot_keyboard_input_client_configuration_value, offset, buffer, buffer_size); 202 } 203 204 if (att_handle == instance->hid_control_point_value_handle){ 205 if (buffer && (buffer_size >= 1u)){ 206 buffer[0] = instance->hid_control_point_suspend; 207 } 208 return 1; 209 } 210 211 hids_device_report_t * report = hids_device_get_report_for_client_configuration_handle(instance, att_handle); 212 if (report != NULL){ 213 return att_read_callback_handle_little_endian_16(report->client_configuration_value, offset, buffer, buffer_size); 214 } 215 return 0; 216 } 217 218 static int att_write_callback(hci_con_handle_t con_handle, uint16_t att_handle, uint16_t transaction_mode, uint16_t offset, uint8_t *buffer, uint16_t buffer_size){ 219 UNUSED(transaction_mode); 220 UNUSED(buffer_size); 221 UNUSED(offset); 222 223 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 224 if (!instance){ 225 log_error("no instance for handle 0x%02x", con_handle); 226 return HIDS_DEVICE_ERROR_CODE_INAPPROPRIATE_CONNECTION_PARAMETERS; 227 } 228 229 if (att_handle == instance->hid_boot_mouse_input_client_configuration_handle){ 230 uint16_t new_value = little_endian_read_16(buffer, 0); 231 instance->hid_boot_mouse_input_client_configuration_value = new_value; 232 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_BOOT_MOUSE_INPUT_REPORT_ENABLE, con_handle, (uint8_t) new_value); 233 } 234 if (att_handle == instance->hid_boot_keyboard_input_client_configuration_handle){ 235 uint16_t new_value = little_endian_read_16(buffer, 0); 236 instance->hid_boot_keyboard_input_client_configuration_value = new_value; 237 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_BOOT_KEYBOARD_INPUT_REPORT_ENABLE, con_handle, (uint8_t) new_value); 238 } 239 240 if (att_handle == instance->hid_protocol_mode_value_handle){ 241 instance->hid_protocol_mode = buffer[0]; 242 log_info("Set protocol mode: %u", instance->hid_protocol_mode); 243 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_PROTOCOL_MODE, con_handle, instance->hid_protocol_mode); 244 } 245 246 if (att_handle == instance->hid_control_point_value_handle){ 247 if (buffer_size < 1u){ 248 return ATT_ERROR_INVALID_OFFSET; 249 } 250 instance->hid_control_point_suspend = buffer[0]; 251 instance->con_handle = con_handle; 252 log_info("Set suspend tp: %u", instance->hid_control_point_suspend ); 253 if (instance->hid_control_point_suspend == 0u){ 254 hids_device_emit_event(HIDS_SUBEVENT_SUSPEND, con_handle); 255 } else if (instance->hid_control_point_suspend == 1u){ 256 hids_device_emit_event(HIDS_SUBEVENT_EXIT_SUSPEND, con_handle); 257 } 258 } 259 260 hids_device_report_t * report = hids_device_get_report_for_client_configuration_handle(instance, att_handle); 261 if (report != NULL){ 262 uint16_t new_value = little_endian_read_16(buffer, 0); 263 report->client_configuration_value = new_value; 264 log_info("Enable Report (type %u) notifications: %x", (uint8_t) report->type, new_value); 265 266 switch (report->type){ 267 case HID_REPORT_TYPE_INPUT: 268 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_INPUT_REPORT_ENABLE, con_handle, (uint8_t) new_value); 269 break; 270 case HID_REPORT_TYPE_OUTPUT: 271 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_OUTPUT_REPORT_ENABLE, con_handle, (uint8_t) new_value); 272 break; 273 case HID_REPORT_TYPE_FEATURE: 274 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_FEATURE_REPORT_ENABLE, con_handle, (uint8_t) new_value); 275 break; 276 default: 277 btstack_unreachable(); 278 break; 279 } 280 } 281 return 0; 282 } 283 284 void hids_device_init_with_storage(uint8_t hid_country_code, const uint8_t * hid_descriptor, uint16_t hid_descriptor_size, 285 uint16_t num_reports, hids_device_report_t * report_storage){ 286 287 hids_device_t * instance = hids_device_create_instance(); 288 289 btstack_assert(num_reports > 0); 290 btstack_assert(report_storage != NULL); 291 292 instance->hid_country_code = hid_country_code; 293 instance->hid_descriptor = hid_descriptor; 294 instance->hid_descriptor_size = hid_descriptor_size; 295 296 // default 297 instance->hid_protocol_mode = 1; 298 299 // get service handle range 300 uint16_t start_handle = 0; 301 uint16_t end_handle = 0xffff; 302 int service_found = gatt_server_get_handle_range_for_service_with_uuid16(ORG_BLUETOOTH_SERVICE_HUMAN_INTERFACE_DEVICE, &start_handle, &end_handle); 303 btstack_assert(service_found != 0); 304 UNUSED(service_found); 305 306 // get report map handle 307 instance->hid_report_map_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_REPORT_MAP); 308 309 // get report map handle 310 instance->hid_protocol_mode_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_PROTOCOL_MODE); 311 312 // get value and client configuration handles for boot mouse input, boot keyboard input and report input 313 instance->hid_boot_mouse_input_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_BOOT_MOUSE_INPUT_REPORT); 314 instance->hid_boot_mouse_input_client_configuration_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_BOOT_MOUSE_INPUT_REPORT); 315 316 instance->hid_boot_keyboard_input_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_BOOT_KEYBOARD_INPUT_REPORT); 317 instance->hid_boot_keyboard_input_client_configuration_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_BOOT_KEYBOARD_INPUT_REPORT); 318 319 instance->hid_control_point_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_HID_CONTROL_POINT); 320 321 log_info("hid_report_map_handle 0x%02x", instance->hid_report_map_handle); 322 log_info("hid_protocol_mode_value_handle 0x%02x", instance->hid_protocol_mode_value_handle); 323 log_info("hid_boot_mouse_input_value_handle 0x%02x", instance->hid_boot_mouse_input_value_handle); 324 log_info("hid_boot_mouse_input_client_configuration_handle 0x%02x", instance->hid_boot_mouse_input_client_configuration_handle); 325 log_info("hid_boot_keyboard_input_value_handle 0x%02x", instance->hid_boot_keyboard_input_value_handle); 326 log_info("hid_boot_keyboard_input_client_configuration_handle 0x%02x", instance->hid_boot_keyboard_input_client_configuration_handle); 327 log_info("hid_control_point_value_handle 0x%02x", instance->hid_control_point_value_handle); 328 329 instance->hid_reports = report_storage; 330 331 uint16_t hid_reports_num = num_reports; 332 uint16_t assigned_reports_num = 0; 333 uint16_t start_chr_handle = start_handle; 334 335 while ( (start_chr_handle < end_handle) && (assigned_reports_num < hid_reports_num)) { 336 uint16_t chr_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_chr_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_REPORT); 337 if (chr_value_handle == 0){ 338 break; 339 } 340 341 uint16_t chr_client_configuration_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid16(start_chr_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_REPORT); 342 uint16_t report_reference_handle = gatt_server_get_descriptor_handle_for_characteristic_with_uuid16(start_chr_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_REPORT, ORG_BLUETOOTH_DESCRIPTOR_REPORT_REFERENCE); 343 uint16_t report_reference_value_len; 344 const uint8_t * report_reference_value = gatt_server_get_const_value_for_handle(report_reference_handle, &report_reference_value_len); 345 346 if (report_reference_value == NULL){ 347 break; 348 } 349 if (report_reference_value_len != 2){ 350 break; 351 } 352 353 hids_device_report_t * report = &report_storage[assigned_reports_num]; 354 report->value_handle = chr_value_handle; 355 report->client_configuration_handle = chr_client_configuration_handle; 356 report->client_configuration_value = 0; 357 358 report->id = report_reference_value[0]; 359 report->type = (hid_report_type_t)report_reference_value[1]; 360 361 switch (report->type){ 362 case HID_REPORT_TYPE_INPUT: 363 instance->hid_input_reports_num++; 364 break; 365 case HID_REPORT_TYPE_OUTPUT: 366 instance->hid_output_reports_num++; 367 break; 368 case HID_REPORT_TYPE_FEATURE: 369 instance->hid_feature_reports_num++; 370 break; 371 default: 372 btstack_unreachable(); 373 return; 374 } 375 log_info("hid_report_value_handle 0x%02x, id %u, type %u", report->value_handle, report->id, (uint8_t)report->type); 376 log_info("hid_report_client_configuration_handle 0x%02x", report->client_configuration_handle); 377 378 assigned_reports_num++; 379 start_chr_handle = chr_client_configuration_handle + 1; 380 } 381 382 // register service with ATT Server 383 hid_service.start_handle = start_handle; 384 hid_service.end_handle = end_handle; 385 hid_service.read_callback = &att_read_callback; 386 hid_service.write_callback = &att_write_callback; 387 att_server_register_service_handler(&hid_service); 388 } 389 390 /** 391 * @brief Set up HIDS Device 392 */ 393 void hids_device_init(uint8_t country_code, const uint8_t * descriptor, uint16_t descriptor_size){ 394 uint16_t hid_reports_num = sizeof(hid_reports_generic_storage) / sizeof(hids_device_report_t); 395 hids_device_init_with_storage(country_code, descriptor, descriptor_size, hid_reports_num, hid_reports_generic_storage); 396 } 397 398 /** 399 * @brief Register callback for the HIDS Device client. 400 * @param callback 401 */ 402 void hids_device_register_packet_handler(btstack_packet_handler_t callback){ 403 packet_handler = callback; 404 } 405 406 /** 407 * @brief Request can send now event to send HID Report 408 * Generates an HIDS_SUBEVENT_CAN_SEND_NOW subevent 409 * @param hid_cid 410 */ 411 void hids_device_request_can_send_now_event(hci_con_handle_t con_handle){ 412 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 413 if (!instance){ 414 log_error("no instance for handle 0x%02x", con_handle); 415 return; 416 } 417 418 instance->battery_callback.callback = &hids_device_can_send_now; 419 instance->battery_callback.context = (void*) (uintptr_t) con_handle; 420 att_server_register_can_send_now_callback(&instance->battery_callback, con_handle); 421 } 422 423 /** 424 * @brief Send HID Report: Input 425 */ 426 427 uint8_t hids_device_send_report_with_id(hci_con_handle_t con_handle, uint16_t report_id, const uint8_t * report, uint16_t report_len){ 428 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 429 if (!instance){ 430 log_error("no instance for handle 0x%02x", con_handle); 431 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 432 } 433 434 hids_device_report_t * report_storage = hids_device_get_report_for_id(instance, report_id); 435 if (report_storage == NULL){ 436 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 437 } 438 439 return att_server_notify(con_handle, report_storage->value_handle, report, report_len); 440 } 441 442 static uint8_t hids_device_send_report_with_type(hci_con_handle_t con_handle, const uint8_t * report, uint16_t report_len, hid_report_type_t report_type){ 443 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 444 if (!instance){ 445 log_error("no instance for handle 0x%02x", con_handle); 446 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 447 } 448 449 uint8_t pos = 0; 450 while (pos < (instance->hid_input_reports_num + instance->hid_output_reports_num + instance->hid_feature_reports_num)){ 451 hids_device_report_t * report_storage = &instance->hid_reports[pos]; 452 453 if (report_storage->type == report_type){ 454 return att_server_notify(con_handle, report_storage->value_handle, report, report_len); 455 } 456 } 457 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 458 } 459 460 void hids_device_send_input_report(hci_con_handle_t con_handle, const uint8_t * report, uint16_t report_len){ 461 (void)hids_device_send_report_with_type(con_handle, report, report_len, HID_REPORT_TYPE_INPUT); 462 } 463 464 /** 465 * @brief Send HID Report: Output 466 */ 467 void hids_device_send_output_report(hci_con_handle_t con_handle, const uint8_t * report, uint16_t report_len){ 468 (void)hids_device_send_report_with_type(con_handle, report, report_len, HID_REPORT_TYPE_OUTPUT); 469 } 470 471 /** 472 * @brief Send HID Report: Feature 473 */ 474 void hids_device_send_feature_report(hci_con_handle_t con_handle, const uint8_t * report, uint16_t report_len){ 475 (void)hids_device_send_report_with_type(con_handle, report, report_len, HID_REPORT_TYPE_FEATURE); 476 } 477 478 /** 479 * @brief Send HID Boot Mouse Input Report 480 */ 481 void hids_device_send_boot_mouse_input_report(hci_con_handle_t con_handle, const uint8_t * report, uint16_t report_len){ 482 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 483 if (!instance){ 484 log_error("no instance for handle 0x%02x", con_handle); 485 return; 486 } 487 att_server_notify(con_handle, instance->hid_boot_mouse_input_value_handle, report, report_len); 488 } 489 490 /** 491 * @brief Send HID Boot Mouse Input Report 492 */ 493 void hids_device_send_boot_keyboard_input_report(hci_con_handle_t con_handle, const uint8_t * report, uint16_t report_len){ 494 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 495 if (!instance){ 496 log_error("no instance for handle 0x%02x", con_handle); 497 return; 498 } 499 att_server_notify(con_handle, instance->hid_boot_keyboard_input_value_handle, report, report_len); 500 } 501