1 /* 2 * Copyright (C) 2021 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 #ifndef HIDS_CLIENT_H 39 #define HIDS_CLIENT_H 40 41 #if defined __cplusplus 42 extern "C" { 43 #endif 44 45 #include <stdint.h> 46 #include "hid.h" 47 #include "btstack_defines.h" 48 #include "bluetooth.h" 49 #include "btstack_linked_list.h" 50 #include "ble/gatt_client.h" 51 52 #ifndef MAX_NUM_HID_SERVICES 53 #define MAX_NUM_HID_SERVICES 3 54 #endif 55 56 typedef enum { 57 HIDS_CLIENT_STATE_IDLE, 58 HIDS_CLIENT_STATE_W2_QUERY_SERVICE, 59 HIDS_CLIENT_STATE_W4_SERVICE_RESULT, 60 HIDS_CLIENT_STATE_W2_QUERY_CHARACTERISTIC, 61 HIDS_CLIENT_STATE_W4_CHARACTERISTIC_RESULT, 62 HIDS_CLIENT_STATE_W2_ENABLE_KEYBOARD, 63 HIDS_CLIENT_STATE_W4_KEYBOARD_ENABLED, 64 HIDS_CLIENT_STATE_W2_ENABLE_MOUSE, 65 HIDS_CLIENT_STATE_W4_MOUSE_ENABLED, 66 HIDS_CLIENT_STATE_W2_SET_PROTOCOL_MODE, 67 HIDS_CLIENT_STATE_W4_SET_PROTOCOL_MODE, 68 HIDS_CLIENT_STATE_CONNECTED 69 } hid_service_client_state_t; 70 71 72 typedef struct { 73 // service 74 uint16_t start_handle; 75 uint16_t end_handle; 76 77 } hid_service_t; 78 79 80 typedef struct { 81 btstack_linked_item_t item; 82 83 hci_con_handle_t con_handle; 84 uint16_t cid; 85 hid_protocol_mode_t protocol_mode; 86 hid_service_client_state_t state; 87 btstack_packet_handler_t client_handler; 88 89 uint8_t num_instances; 90 hid_service_t services[MAX_NUM_HID_SERVICES]; 91 92 // used for discovering characteristics 93 uint8_t service_index; 94 hid_protocol_mode_t required_protocol_mode; 95 96 uint16_t protocol_mode_value_handle; 97 98 uint16_t boot_keyboard_input_value_handle; 99 uint16_t boot_keyboard_input_end_handle; 100 uint16_t boot_keyboard_input_properties; 101 gatt_client_notification_t boot_keyboard_notifications; 102 103 uint16_t boot_mouse_input_value_handle; 104 uint16_t boot_mouse_input_end_handle; 105 uint16_t boot_mouse_input_properties; 106 gatt_client_notification_t boot_mouse_notifications; 107 108 } hids_client_t; 109 110 /* API_START */ 111 112 /** 113 * @brief Initialize Battery Service. 114 */ 115 void hids_client_init(void); 116 117 /* @brief Connect to HID Services of remote device. 118 * 119 * @param con_handle 120 * @param packet_handler 121 * @param protocol_mode see hid_protocol_mode_t in hid.h 122 * @param hids_cid 123 * @return status ERROR_CODE_SUCCESS on success, otherwise ERROR_CODE_COMMAND_DISALLOWED if there is already a client associated with con_handle, or BTSTACK_MEMORY_ALLOC_FAILED 124 */ 125 uint8_t hids_client_connect(hci_con_handle_t con_handle, btstack_packet_handler_t packet_handler, hid_protocol_mode_t protocol_mode, uint16_t * hids_cid); 126 127 /** 128 * @brief Disconnect from Battery Service. 129 * @param hids_cid 130 * @return status 131 */ 132 uint8_t hids_client_disconnect(uint16_t hids_cid); 133 134 /** 135 * @brief De-initialize Battery Service. 136 */ 137 void hids_client_deinit(void); 138 139 /* API_END */ 140 141 #if defined __cplusplus 142 } 143 #endif 144 145 #endif 146