/* * Copyright (C) 2014 BlueKitchen GmbH * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the copyright holders nor the names of * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * 4. Any redistribution, use, or modification is done solely for * personal benefit and not for any commercial purpose or for * monetary gain. * * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * Please inquire about commercial licensing options at * contact@bluekitchen-gmbh.com * */ #define __BTSTACK_FILE__ "hid_mouse_demo.c" // ***************************************************************************** /* EXAMPLE_START(hid_mouse_demo): HID Mouse (Server) Demo * * @text This HID Device example demonstrates how to implement * an HID keyboard. Without a HAVE_BTSTACK_STDIN, a fixed demo text is sent * If HAVE_BTSTACK_STDIN is defined, you can type from the terminal * * @text Status: Basic implementation. HID Request from Host are not answered yet. Works with iOS. */ // ***************************************************************************** #include #include #include #include #include #include "btstack.h" #ifdef HAVE_BTSTACK_STDIN #include "btstack_stdin.h" #endif // to enable demo text on POSIX systems // #undef HAVE_BTSTACK_STDIN static uint8_t hid_service_buffer[250]; static const char hid_device_name[] = "BTstack HID Mouse"; static btstack_packet_callback_registration_t hci_event_callback_registration; static uint16_t hid_cid; // from USB HID Specification 1.1, Appendix B.2 const uint8_t hid_descriptor_mouse_boot_mode[] = { 0x05, 0x01, // USAGE_PAGE (Generic Desktop) 0x09, 0x02, // USAGE (Mouse) 0xa1, 0x01, // COLLECTION (Application) 0x09, 0x01, // USAGE (Pointer) 0xa1, 0x00, // COLLECTION (Physical) 0x05, 0x09, // USAGE_PAGE (Button) 0x19, 0x01, // USAGE_MINIMUM (Button 1) 0x29, 0x03, // USAGE_MAXIMUM (Button 3) 0x15, 0x00, // LOGICAL_MINIMUM (0) 0x25, 0x01, // LOGICAL_MAXIMUM (1) 0x95, 0x03, // REPORT_COUNT (3) 0x75, 0x01, // REPORT_SIZE (1) 0x81, 0x02, // INPUT (Data,Var,Abs) 0x95, 0x01, // REPORT_COUNT (1) 0x75, 0x05, // REPORT_SIZE (5) 0x81, 0x03, // INPUT (Cnst,Var,Abs) 0x05, 0x01, // USAGE_PAGE (Generic Desktop) 0x09, 0x30, // USAGE (X) 0x09, 0x31, // USAGE (Y) 0x15, 0x81, // LOGICAL_MINIMUM (-127) 0x25, 0x7f, // LOGICAL_MAXIMUM (127) 0x75, 0x08, // REPORT_SIZE (8) 0x95, 0x02, // REPORT_COUNT (2) 0x81, 0x06, // INPUT (Data,Var,Rel) 0xc0, // END_COLLECTION 0xc0 // END_COLLECTION }; // HID Report sending static void send_report(uint8_t buttons, int8_t dx, int8_t dy){ uint8_t report[] = { 0xa1, buttons, (uint8_t) dx, (uint8_t) dy}; hid_device_send_interrupt_message(hid_cid, &report[0], sizeof(report)); printf("Mouse: %d/%d - buttons: %02x\n", dx, dy, buttons); } static int dx; static int dy; static uint8_t buttons; static void mousing_can_send_now(void){ send_report(buttons, dx, dy); // reset dx = 0; dy = 0; if (buttons){ buttons = 0; hid_device_request_can_send_now_event(hid_cid); } } // Demo Application #ifdef HAVE_BTSTACK_STDIN static const int MOUSE_SPEED = 30; // On systems with STDIN, we can directly type on the console static void stdin_process(char character){ if (!hid_cid) { printf("Mouse not connected, ignoring '%c'\n", character); return; } switch (character){ case 'a': dx -= MOUSE_SPEED; break; case 's': dy += MOUSE_SPEED; break; case 'd': dx += MOUSE_SPEED; break; case 'w': dy -= MOUSE_SPEED; break; case 'l': buttons |= 1; break; case 'r': buttons |= 2; break; default: return; } hid_device_request_can_send_now_event(hid_cid); } #else // On embedded systems, simulate clicking on 4 corners of a square #define MOUSE_PERIOD_MS 15 static int step; static const int STEPS_PER_DIRECTION = 50; static const int MOUSE_SPEED = 10; static struct { int dx; int dy; } directions[] = { { 1, 0 }, { 0, 1 }, { -1, 0 }, { 0, -1 }, }; static btstack_timer_source_t mousing_timer; static void mousing_timer_handler(btstack_timer_source_t * ts){ if (con_handle == HCI_CON_HANDLE_INVALID) return; // simulate left click when corner reached if (step % STEPS_PER_DIRECTION == 0){ buttons |= 1; } // simulate move int direction_index = step / STEPS_PER_DIRECTION; dx += directions[direction_index].dx * MOUSE_SPEED; dy += directions[direction_index].dy * MOUSE_SPEED; // next step++; if (step >= STEPS_PER_DIRECTION * 4) { step = 0; } // trigger send hids_device_request_can_send_now_event(con_handle); // set next timer btstack_run_loop_set_timer(ts, MOUSE_PERIOD_MS); btstack_run_loop_add_timer(ts); } static void hid_embedded_start_mousing(void){ printf("Start mousing..\n"); step = 0; // set one-shot timer mousing_timer.process = &mousing_timer_handler; btstack_run_loop_set_timer(&mousing_timer, MOUSE_PERIOD_MS); btstack_run_loop_add_timer(&mousing_timer); } #endif static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * packet, uint16_t packet_size){ UNUSED(channel); UNUSED(packet_size); switch (packet_type){ case HCI_EVENT_PACKET: switch (packet[0]){ case HCI_EVENT_USER_CONFIRMATION_REQUEST: // ssp: inform about user confirmation request log_info("SSP User Confirmation Request with numeric value '%06"PRIu32"'\n", hci_event_user_confirmation_request_get_numeric_value(packet)); log_info("SSP User Confirmation Auto accept\n"); break; case HCI_EVENT_HID_META: switch (hci_event_hid_meta_get_subevent_code(packet)){ case HID_SUBEVENT_CONNECTION_OPENED: if (hid_subevent_connection_opened_get_status(packet)) return; hid_cid = hid_subevent_connection_opened_get_hid_cid(packet); #ifdef HAVE_BTSTACK_STDIN printf("HID Connected, control mouse using 'a','s',''d', 'w' keys for movement and 'l' and 'r' for buttons...\n"); #else printf("HID Connected, simulating mouse movements...\n"); hid_embedded_start_typing(); #endif break; case HID_SUBEVENT_CONNECTION_CLOSED: printf("HID Disconnected\n"); hid_cid = 0; break; case HID_SUBEVENT_CAN_SEND_NOW: mousing_can_send_now(); break; default: break; } break; default: break; } break; default: break; } } /* @section Main Application Setup * * @text Listing MainConfiguration shows main application code. * To run a HID Device service you need to initialize the SDP, and to create and register HID Device record with it. * At the end the Bluetooth stack is started. */ /* LISTING_START(MainConfiguration): Setup HID Device */ int btstack_main(int argc, const char * argv[]); int btstack_main(int argc, const char * argv[]){ (void)argc; (void)argv; // register for HCI events hci_event_callback_registration.callback = &packet_handler; hci_add_event_handler(&hci_event_callback_registration); hci_register_sco_packet_handler(&packet_handler); gap_discoverable_control(1); gap_set_class_of_device(0x2540); gap_set_local_name("HID Mouse Demo 00:00:00:00:00:00"); // L2CAP l2cap_init(); // SDP Server sdp_init(); memset(hid_service_buffer, 0, sizeof(hid_service_buffer)); // hid sevice subclass 2540 Keyboard, hid counntry code 33 US, hid virtual cable off, hid reconnect initiate off, hid boot device off hid_create_sdp_record(hid_service_buffer, 0x10001, 0x2540, 33, 0, 0, 0, hid_descriptor_mouse_boot_mode, sizeof(hid_descriptor_mouse_boot_mode), hid_device_name); printf("SDP service record size: %u\n", de_get_len( hid_service_buffer)); sdp_register_service(hid_service_buffer); // HID Device hid_device_init(); hid_device_register_packet_handler(&packet_handler); #ifdef HAVE_BTSTACK_STDIN btstack_stdin_setup(stdin_process); #endif // turn on! hci_power_control(HCI_POWER_ON); return 0; } /* LISTING_END */ /* EXAMPLE_END */