/* * 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 * */ // ***************************************************************************** // // accel_demo // // ***************************************************************************** #include #include #include #include #include #include "btstack_chipset_cc256x.h" #include "hal_adc.h" #include "hal_board.h" #include "hal_compat.h" #include "hal_usb.h" #include "hci_cmd.h" #include "btstack_run_loop.h" #include "classic/sdp_util.h" #include "hci.h" #include "l2cap.h" #include "btstack_memory.h" #include "classic/btstack_link_key_db.h" #include "classic/rfcomm.h" #include "classic/sdp_server.h" #include "btstack_config.h" #define HEARTBEAT_PERIOD_MS 1000 #define FONT_HEIGHT 12 // Each character has 13 lines #define FONT_WIDTH 8 static int row = 0; char lineBuffer[80]; static uint8_t rfcomm_channel_nr = 1; static uint16_t rfcomm_channel_id; static uint8_t spp_service_buffer[150]; static btstack_packet_callback_registration_t hci_event_callback_registration; // SPP description static uint8_t accel_buffer[6]; static void prepare_accel_packet(void){ int16_t accl_x; int16_t accl_y; int16_t accl_z; /* read the digital accelerometer x- direction and y - direction output */ halAccelerometerRead((int *)&accl_x, (int *)&accl_y, (int *)&accl_z); accel_buffer[0] = 0x01; // Start of "header" accel_buffer[1] = accl_x; accel_buffer[2] = (accl_x >> 8); accel_buffer[3] = accl_y; accel_buffer[4] = (accl_y >> 8); int index; uint8_t checksum = 0; for (index = 0; index < 5; index++) { checksum += accel_buffer[index]; } accel_buffer[5] = checksum; /* start the ADC to read the next accelerometer output */ halAdcStartRead(); printf("Accel: X: %04d, Y: %04d, Z: %04d\n\r", accl_x, accl_y, accl_z); } static void send_packet(void){ int err = rfcomm_send(rfcomm_channel_id, (uint8_t *)accel_buffer, sizeof(accel_buffer)); switch(err){ case 0: prepare_accel_packet(); break; case BTSTACK_ACL_BUFFERS_FULL: break; default: printf("rfcomm_send() -> err %d\n\r", err); break; } } // Bluetooth logic static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ bd_addr_t event_addr; uint8_t rfcomm_channel_nr; uint16_t mtu; int err; switch (packet_type) { case HCI_EVENT_PACKET: switch (hci_event_packet_get_type(packet)) { case BTSTACK_EVENT_STATE: if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){ printf("BTstack is up and running\n"); } break; case HCI_EVENT_COMMAND_COMPLETE: if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)){ reverse_bd_addr(&packet[6], event_addr); printf("BD-ADDR: %s\n\r", bd_addr_to_str(event_addr)); break; } break; case HCI_EVENT_LINK_KEY_REQUEST: // deny link key request printf("Link key request\n\r"); hci_event_link_key_request_get_bd_addr(packet, event_addr); hci_send_cmd(&hci_link_key_request_negative_reply, &event_addr); break; case HCI_EVENT_PIN_CODE_REQUEST: // inform about pin code request printf("Pin code request - using '0000'\n\r"); reverse_bd_addr(&packet[2], event_addr); hci_send_cmd(&hci_pin_code_request_reply, &event_addr, 4, "0000"); break; case RFCOMM_EVENT_INCOMING_CONNECTION: // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); rfcomm_channel_nr = rfcomm_event_incoming_connection_get_server_channel(packet); rfcomm_channel_id = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); printf("RFCOMM channel %u requested for %s\n", rfcomm_channel_nr, bd_addr_to_str(event_addr)); rfcomm_accept_connection(rfcomm_channel_id); break; case RFCOMM_EVENT_CHANNEL_OPENED: // data: event(8), len(8), status (8), address (48), server channel(8), rfcomm_cid(16), max frame size(16) if (rfcomm_event_channel_opened_get_status(packet)) { printf("RFCOMM channel open failed, status %u\n", rfcomm_event_channel_opened_get_status(packet)); } else { rfcomm_channel_id = rfcomm_event_channel_opened_get_rfcomm_cid(packet); mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); printf("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u\n", rfcomm_channel_id, mtu); } break; case RFCOMM_EVENT_CAN_SEND_NOW: if (rfcomm_can_send_packet_now(rfcomm_channel_id)) send_packet(); break; case RFCOMM_EVENT_CHANNEL_CLOSED: rfcomm_channel_id = 0; break; default: break; } break; default: break; } } int btstack_main(int argc, const char * argv[]); int btstack_main(int argc, const char * argv[]){ // Accel halAccelerometerInit(); prepare_accel_packet(); // register for HCI events hci_event_callback_registration.callback = &packet_handler; hci_add_event_handler(&hci_event_callback_registration); // init L2CAP l2cap_init(); // init RFCOMM rfcomm_init(); rfcomm_register_service(rfcomm_packet_handler, rfcomm_channel_nr, 100); // reserved channel, mtu=100 // init SDP, create record for SPP and register with SDP sdp_init(); memset(spp_service_buffer, 0, sizeof(spp_service_buffer)); spp_create_sdp_record((uint8_t*) spp_service_buffer, 1, "SPP Accel"); printf("SDP service buffer size: %u\n\r", (uint16_t) de_get_len((uint8_t*) spp_service_buffer)); sdp_register_service((uint8_t*) spp_service_buffer); // ready - enable irq used in h4 task __enable_interrupt(); // set local name gap_set_local_name("BTstack SPP Sensor"); // make discoverable gap_discoverable_control(1); // turn on! hci_power_control(HCI_POWER_ON); return 0; } /* rfcomm_send gets called before we have credits rfcomm_send returns undefined error codes??? */