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