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 void hids_device_emit_event_with_uint8(uint8_t event, hci_con_handle_t con_handle, uint8_t value){ 129 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 130 if (!instance){ 131 log_error("no instance for handle 0x%02x", con_handle); 132 return; 133 } 134 135 if (!packet_handler) return; 136 uint8_t buffer[6]; 137 buffer[0] = HCI_EVENT_HIDS_META; 138 buffer[1] = 4; 139 buffer[2] = event; 140 little_endian_store_16(buffer, 3, (uint16_t) con_handle); 141 buffer[5] = value; 142 (*packet_handler)(HCI_EVENT_PACKET, 0, buffer, sizeof(buffer)); 143 } 144 145 static void hids_device_emit_event_with_uint8_uint8_t(uint8_t event, hci_con_handle_t con_handle, uint8_t value_1, uint8_t value_2){ 146 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 147 if (!instance){ 148 log_error("no instance for handle 0x%02x", con_handle); 149 return; 150 } 151 152 if (!packet_handler) return; 153 uint8_t buffer[7]; 154 buffer[0] = HCI_EVENT_HIDS_META; 155 buffer[1] = 4; 156 buffer[2] = event; 157 little_endian_store_16(buffer, 3, (uint16_t) con_handle); 158 buffer[5] = value_1; 159 buffer[6] = value_2; 160 (*packet_handler)(HCI_EVENT_PACKET, 0, buffer, sizeof(buffer)); 161 } 162 163 static void hids_device_emit_event(uint8_t event, hci_con_handle_t con_handle){ 164 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 165 if (!instance){ 166 log_error("no instance for handle 0x%02x", con_handle); 167 return; 168 } 169 170 if (!packet_handler) return; 171 uint8_t buffer[5]; 172 buffer[0] = HCI_EVENT_HIDS_META; 173 buffer[1] = 4; 174 buffer[2] = event; 175 little_endian_store_16(buffer, 3, (uint16_t) con_handle); 176 (*packet_handler)(HCI_EVENT_PACKET, 0, buffer, sizeof(buffer)); 177 } 178 179 static void hids_device_can_send_now(void * context){ 180 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) context; 181 // notify client 182 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 183 if (!instance){ 184 log_error("no instance for handle 0x%02x", con_handle); 185 return; 186 } 187 188 if (!packet_handler) return; 189 uint8_t buffer[5]; 190 buffer[0] = HCI_EVENT_HIDS_META; 191 buffer[1] = 3; 192 buffer[2] = HIDS_SUBEVENT_CAN_SEND_NOW; 193 little_endian_store_16(buffer, 3, (uint16_t) con_handle); 194 (*packet_handler)(HCI_EVENT_PACKET, 0, buffer, sizeof(buffer)); 195 } 196 197 // ATT Client Read Callback for Dynamic Data 198 // - if buffer == NULL, don't copy data, just return size of value 199 // - if buffer != NULL, copy data and return number bytes copied 200 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){ 201 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 202 if (!instance){ 203 log_error("no instance for handle 0x%02x", con_handle); 204 return HIDS_DEVICE_ERROR_CODE_INAPPROPRIATE_CONNECTION_PARAMETERS; 205 } 206 207 if (att_handle == instance->hid_protocol_mode_value_handle){ 208 log_info("Read protocol mode"); 209 return att_read_callback_handle_byte(instance->hid_protocol_mode, offset, buffer, buffer_size); 210 } 211 212 if (att_handle == instance->hid_report_map_handle){ 213 log_info("Read report map"); 214 return att_read_callback_handle_blob(instance->hid_descriptor, instance->hid_descriptor_size, offset, buffer, buffer_size); 215 } 216 217 if (att_handle == instance->hid_boot_mouse_input_client_configuration_handle){ 218 return att_read_callback_handle_little_endian_16(instance->hid_boot_mouse_input_client_configuration_value, offset, buffer, buffer_size); 219 } 220 221 if (att_handle == instance->hid_boot_keyboard_input_client_configuration_handle){ 222 return att_read_callback_handle_little_endian_16(instance->hid_boot_keyboard_input_client_configuration_value, offset, buffer, buffer_size); 223 } 224 225 if (att_handle == instance->hid_control_point_value_handle){ 226 if (buffer && (buffer_size >= 1u)){ 227 buffer[0] = instance->hid_control_point_suspend; 228 } 229 return 1; 230 } 231 232 hids_device_report_t * report = hids_device_get_report_for_client_configuration_handle(instance, att_handle); 233 if (report != NULL){ 234 return att_read_callback_handle_little_endian_16(report->client_configuration_value, offset, buffer, buffer_size); 235 } 236 return 0; 237 } 238 239 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){ 240 UNUSED(transaction_mode); 241 UNUSED(buffer_size); 242 UNUSED(offset); 243 244 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 245 if (!instance){ 246 log_error("no instance for handle 0x%02x", con_handle); 247 return HIDS_DEVICE_ERROR_CODE_INAPPROPRIATE_CONNECTION_PARAMETERS; 248 } 249 250 if (att_handle == instance->hid_boot_mouse_input_client_configuration_handle){ 251 uint16_t new_value = little_endian_read_16(buffer, 0); 252 instance->hid_boot_mouse_input_client_configuration_value = new_value; 253 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_BOOT_MOUSE_INPUT_REPORT_ENABLE, con_handle, (uint8_t) new_value); 254 } 255 if (att_handle == instance->hid_boot_keyboard_input_client_configuration_handle){ 256 uint16_t new_value = little_endian_read_16(buffer, 0); 257 instance->hid_boot_keyboard_input_client_configuration_value = new_value; 258 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_BOOT_KEYBOARD_INPUT_REPORT_ENABLE, con_handle, (uint8_t) new_value); 259 } 260 261 if (att_handle == instance->hid_protocol_mode_value_handle){ 262 instance->hid_protocol_mode = buffer[0]; 263 log_info("Set protocol mode: %u", instance->hid_protocol_mode); 264 hids_device_emit_event_with_uint8(HIDS_SUBEVENT_PROTOCOL_MODE, con_handle, instance->hid_protocol_mode); 265 } 266 267 if (att_handle == instance->hid_control_point_value_handle){ 268 if (buffer_size < 1u){ 269 return ATT_ERROR_INVALID_OFFSET; 270 } 271 instance->hid_control_point_suspend = buffer[0]; 272 instance->con_handle = con_handle; 273 log_info("Set suspend tp: %u", instance->hid_control_point_suspend ); 274 if (instance->hid_control_point_suspend == 0u){ 275 hids_device_emit_event(HIDS_SUBEVENT_SUSPEND, con_handle); 276 } else if (instance->hid_control_point_suspend == 1u){ 277 hids_device_emit_event(HIDS_SUBEVENT_EXIT_SUSPEND, con_handle); 278 } 279 } 280 281 hids_device_report_t * report = hids_device_get_report_for_client_configuration_handle(instance, att_handle); 282 if (report != NULL){ 283 uint16_t new_value = little_endian_read_16(buffer, 0); 284 report->client_configuration_value = new_value; 285 log_info("Enable Report (type %u) notifications: %x", (uint8_t) report->type, new_value); 286 287 switch (report->type){ 288 case HID_REPORT_TYPE_INPUT: 289 hids_device_emit_event_with_uint8_uint8_t(HIDS_SUBEVENT_INPUT_REPORT_ENABLE, con_handle, report->id, (uint8_t) new_value); 290 break; 291 case HID_REPORT_TYPE_OUTPUT: 292 hids_device_emit_event_with_uint8_uint8_t(HIDS_SUBEVENT_OUTPUT_REPORT_ENABLE, con_handle, report->id, (uint8_t) new_value); 293 break; 294 case HID_REPORT_TYPE_FEATURE: 295 hids_device_emit_event_with_uint8_uint8_t(HIDS_SUBEVENT_FEATURE_REPORT_ENABLE, con_handle, report->id, (uint8_t) new_value); 296 break; 297 default: 298 btstack_unreachable(); 299 break; 300 } 301 } 302 return 0; 303 } 304 305 void hids_device_init_with_storage(uint8_t hid_country_code, const uint8_t * hid_descriptor, uint16_t hid_descriptor_size, 306 uint16_t num_reports, hids_device_report_t * report_storage){ 307 308 hids_device_t * instance = hids_device_create_instance(); 309 310 btstack_assert(num_reports > 0); 311 btstack_assert(report_storage != NULL); 312 313 instance->hid_country_code = hid_country_code; 314 instance->hid_descriptor = hid_descriptor; 315 instance->hid_descriptor_size = hid_descriptor_size; 316 317 // default 318 instance->hid_protocol_mode = 1; 319 320 // get service handle range 321 uint16_t start_handle = 0; 322 uint16_t end_handle = 0xffff; 323 int service_found = gatt_server_get_handle_range_for_service_with_uuid16(ORG_BLUETOOTH_SERVICE_HUMAN_INTERFACE_DEVICE, &start_handle, &end_handle); 324 btstack_assert(service_found != 0); 325 UNUSED(service_found); 326 327 // get report map handle 328 instance->hid_report_map_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_REPORT_MAP); 329 330 // get report map handle 331 instance->hid_protocol_mode_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_PROTOCOL_MODE); 332 333 // get value and client configuration handles for boot mouse input, boot keyboard input and report input 334 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); 335 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); 336 337 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); 338 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); 339 340 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); 341 342 log_info("hid_report_map_handle 0x%02x", instance->hid_report_map_handle); 343 log_info("hid_protocol_mode_value_handle 0x%02x", instance->hid_protocol_mode_value_handle); 344 log_info("hid_boot_mouse_input_value_handle 0x%02x", instance->hid_boot_mouse_input_value_handle); 345 log_info("hid_boot_mouse_input_client_configuration_handle 0x%02x", instance->hid_boot_mouse_input_client_configuration_handle); 346 log_info("hid_boot_keyboard_input_value_handle 0x%02x", instance->hid_boot_keyboard_input_value_handle); 347 log_info("hid_boot_keyboard_input_client_configuration_handle 0x%02x", instance->hid_boot_keyboard_input_client_configuration_handle); 348 log_info("hid_control_point_value_handle 0x%02x", instance->hid_control_point_value_handle); 349 350 instance->hid_reports = report_storage; 351 352 uint16_t hid_reports_num = num_reports; 353 uint16_t assigned_reports_num = 0; 354 uint16_t start_chr_handle = start_handle; 355 356 while ( (start_chr_handle < end_handle) && (assigned_reports_num < hid_reports_num)) { 357 uint16_t chr_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_chr_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_REPORT); 358 if (chr_value_handle == 0){ 359 break; 360 } 361 362 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); 363 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); 364 uint16_t report_reference_value_len; 365 const uint8_t * report_reference_value = gatt_server_get_const_value_for_handle(report_reference_handle, &report_reference_value_len); 366 367 if (report_reference_value == NULL){ 368 break; 369 } 370 if (report_reference_value_len != 2){ 371 break; 372 } 373 374 hids_device_report_t * report = &report_storage[assigned_reports_num]; 375 report->value_handle = chr_value_handle; 376 report->client_configuration_handle = chr_client_configuration_handle; 377 report->client_configuration_value = 0; 378 379 report->id = report_reference_value[0]; 380 report->type = (hid_report_type_t)report_reference_value[1]; 381 382 switch (report->type){ 383 case HID_REPORT_TYPE_INPUT: 384 instance->hid_input_reports_num++; 385 break; 386 case HID_REPORT_TYPE_OUTPUT: 387 instance->hid_output_reports_num++; 388 break; 389 case HID_REPORT_TYPE_FEATURE: 390 instance->hid_feature_reports_num++; 391 break; 392 default: 393 btstack_unreachable(); 394 return; 395 } 396 log_info("hid_report_value_handle 0x%02x, id %u, type %u", report->value_handle, report->id, (uint8_t)report->type); 397 log_info("hid_report_client_configuration_handle 0x%02x", report->client_configuration_handle); 398 399 assigned_reports_num++; 400 start_chr_handle = chr_client_configuration_handle + 1; 401 } 402 403 // register service with ATT Server 404 hid_service.start_handle = start_handle; 405 hid_service.end_handle = end_handle; 406 hid_service.read_callback = &att_read_callback; 407 hid_service.write_callback = &att_write_callback; 408 att_server_register_service_handler(&hid_service); 409 } 410 411 /** 412 * @brief Set up HIDS Device 413 */ 414 void hids_device_init(uint8_t country_code, const uint8_t * descriptor, uint16_t descriptor_size){ 415 uint16_t hid_reports_num = sizeof(hid_reports_generic_storage) / sizeof(hids_device_report_t); 416 hids_device_init_with_storage(country_code, descriptor, descriptor_size, hid_reports_num, hid_reports_generic_storage); 417 } 418 419 /** 420 * @brief Register callback for the HIDS Device client. 421 * @param callback 422 */ 423 void hids_device_register_packet_handler(btstack_packet_handler_t callback){ 424 packet_handler = callback; 425 } 426 427 /** 428 * @brief Request can send now event to send HID Report 429 * Generates an HIDS_SUBEVENT_CAN_SEND_NOW subevent 430 * @param hid_cid 431 */ 432 void hids_device_request_can_send_now_event(hci_con_handle_t con_handle){ 433 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 434 if (!instance){ 435 log_error("no instance for handle 0x%02x", con_handle); 436 return; 437 } 438 439 instance->battery_callback.callback = &hids_device_can_send_now; 440 instance->battery_callback.context = (void*) (uintptr_t) con_handle; 441 att_server_register_can_send_now_callback(&instance->battery_callback, con_handle); 442 } 443 444 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){ 445 hids_device_t * instance = hids_device_get_instance_for_con_handle(con_handle); 446 if (!instance){ 447 log_error("no instance for handle 0x%02x", con_handle); 448 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 449 } 450 451 hids_device_report_t * report_storage = hids_device_get_report_for_id_and_type(instance, report_id, 452 HID_REPORT_TYPE_INPUT); 453 if (report_storage == NULL){ 454 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 455 } 456 457 return att_server_notify(con_handle, report_storage->value_handle, report, report_len); 458 } 459 460 uint8_t hids_device_send_input_report(hci_con_handle_t con_handle, const uint8_t * report, uint16_t report_len){ 461 hids_device_t * device = hids_device_get_instance_for_con_handle(con_handle); 462 if (!device){ 463 log_error("no instance for handle 0x%02x", con_handle); 464 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 465 } 466 467 uint8_t pos; 468 uint8_t total_reports = device->hid_input_reports_num + device->hid_output_reports_num + device->hid_feature_reports_num; 469 for (pos = 0 ; pos < total_reports ; pos++){ 470 hids_device_report_t * report_storage = &device->hid_reports[pos]; 471 if (report_storage->type == HID_REPORT_TYPE_INPUT){ 472 return att_server_notify(con_handle, report_storage->value_handle, report, report_len); 473 } 474 } 475 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 476 } 477 478 /** 479 * @brief Send HID Boot Mouse Input Report 480 */ 481 uint8_t 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 ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 486 } 487 return 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 uint8_t 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 ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 498 } 499 return att_server_notify(con_handle, instance->hid_boot_keyboard_input_value_handle, report, report_len); 500 } 501