btle.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #include "common/common.h"
00018 #include "nordic_common.h"
00019 
00020 #include "btle.h"
00021 
00022 #include "ble_stack_handler_types.h "
00023 #include "ble_flash.h "
00024 #include "ble_conn_params.h "
00025 
00026 #include "btle_gap.h"
00027 #include "btle_advertising.h"
00028 #include "custom/custom_helper.h"
00029 
00030 #include "softdevice_handler.h "
00031 #include "pstorage.h "
00032 
00033 #include "GapEvents.h"
00034 #include "nRF51Gap.h"
00035 #include "nRF51GattServer.h"
00036 #include "device_manager.h "
00037 
00038 #include "ble_hci.h"
00039 
00040 extern "C" void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name);
00041 void            app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t *p_file_name);
00042 
00043 static void btle_handler(ble_evt_t *p_ble_evt);
00044 
00045 static void sys_evt_dispatch(uint32_t sys_evt)
00046 {
00047     pstorage_sys_event_handler(sys_evt);
00048 }
00049 
00050 error_t btle_init(void)
00051 {
00052 #if defined(TARGET_DELTA_DFCM_NNN40) || defined(TARGET_HRM1017)
00053     SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_RC_250_PPM_4000MS_CALIBRATION, NULL);
00054 #else
00055     SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, NULL);
00056 #endif
00057 
00058     // Enable BLE stack
00059     /**
00060      * Using this call, the application can select whether to include the
00061      * Service Changed characteristic in the GATT Server. The default in all
00062      * previous releases has been to include the Service Changed characteristic,
00063      * but this affects how GATT clients behave. Specifically, it requires
00064      * clients to subscribe to this attribute and not to cache attribute handles
00065      * between connections unless the devices are bonded. If the application
00066      * does not need to change the structure of the GATT server attributes at
00067      * runtime this adds unnecessary complexity to the interaction with peer
00068      * clients. If the SoftDevice is enabled with the Service Changed
00069      * Characteristics turned off, then clients are allowed to cache attribute
00070      * handles making applications simpler on both sides.
00071      */
00072     static const bool IS_SRVC_CHANGED_CHARACT_PRESENT = true;
00073     ble_enable_params_t enableParams = {
00074         .gatts_enable_params = {
00075             .service_changed = IS_SRVC_CHANGED_CHARACT_PRESENT
00076         }
00077     };
00078     if (sd_ble_enable(&enableParams) != NRF_SUCCESS) {
00079         return ERROR_INVALID_PARAM;
00080     }
00081 
00082     ble_gap_addr_t addr;
00083     if (sd_ble_gap_address_get(&addr) != NRF_SUCCESS) {
00084         return ERROR_INVALID_PARAM;
00085     }
00086     if (sd_ble_gap_address_set(BLE_GAP_ADDR_CYCLE_MODE_NONE, &addr) != NRF_SUCCESS) {
00087         return ERROR_INVALID_PARAM;
00088     }
00089 
00090     ASSERT_STATUS( softdevice_ble_evt_handler_set(btle_handler));
00091     ASSERT_STATUS( softdevice_sys_evt_handler_set(sys_evt_dispatch));
00092 
00093     btle_gap_init();
00094 
00095     return ERROR_NONE;
00096 }
00097 
00098 static void btle_handler(ble_evt_t *p_ble_evt)
00099 {
00100     /* Library service handlers */
00101 #if SDK_CONN_PARAMS_MODULE_ENABLE
00102     ble_conn_params_on_ble_evt(p_ble_evt);
00103 #endif
00104 
00105     dm_ble_evt_handler(p_ble_evt);
00106 
00107     /* Custom event handler */
00108     switch (p_ble_evt->header.evt_id) {
00109         case BLE_GAP_EVT_CONNECTED: {
00110             Gap::Handle_t handle = p_ble_evt->evt.gap_evt.conn_handle;
00111             nRF51Gap::getInstance().setConnectionHandle(handle);
00112             const Gap::ConnectionParams_t *params = reinterpret_cast<Gap::ConnectionParams_t *>(&(p_ble_evt->evt.gap_evt.params.connected.conn_params));
00113             const ble_gap_addr_t *peer = &p_ble_evt->evt.gap_evt.params.connected.peer_addr;
00114             const ble_gap_addr_t *own  = &p_ble_evt->evt.gap_evt.params.connected.own_addr;
00115             nRF51Gap::getInstance().processConnectionEvent(handle,
00116                                                            static_cast<Gap::AddressType_t>(peer->addr_type), peer->addr,
00117                                                            static_cast<Gap::AddressType_t>(own->addr_type),  own->addr,
00118                                                            params);
00119             break;
00120         }
00121 
00122         case BLE_GAP_EVT_DISCONNECTED: {
00123             Gap::Handle_t handle = p_ble_evt->evt.gap_evt.conn_handle;
00124             // Since we are not in a connection and have not started advertising,
00125             // store bonds
00126             nRF51Gap::getInstance().setConnectionHandle (BLE_CONN_HANDLE_INVALID);
00127 
00128             Gap::DisconnectionReason_t reason;
00129             switch (p_ble_evt->evt.gap_evt.params.disconnected.reason) {
00130                 case BLE_HCI_LOCAL_HOST_TERMINATED_CONNECTION:
00131                     reason = Gap::LOCAL_HOST_TERMINATED_CONNECTION;
00132                     break;
00133                 case BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION:
00134                     reason = Gap::REMOTE_USER_TERMINATED_CONNECTION;
00135                     break;
00136                 case BLE_HCI_CONN_INTERVAL_UNACCEPTABLE:
00137                     reason = Gap::CONN_INTERVAL_UNACCEPTABLE;
00138                     break;
00139                 default:
00140                     /* Please refer to the underlying transport library for an
00141                      * interpretion of this reason's value. */
00142                     reason = static_cast<Gap::DisconnectionReason_t>(p_ble_evt->evt.gap_evt.params.disconnected.reason);
00143                     break;
00144             }
00145             nRF51Gap::getInstance().processDisconnectionEvent(handle, reason);
00146             break;
00147         }
00148 
00149         case BLE_GAP_EVT_PASSKEY_DISPLAY:
00150             nRF51Gap::getInstance().processPasskeyDisplayEvent(p_ble_evt->evt.gap_evt.conn_handle, p_ble_evt->evt.gap_evt.params.passkey_display.passkey);
00151             break;
00152 
00153         case BLE_GAP_EVT_TIMEOUT:
00154             if (p_ble_evt->evt.gap_evt.params.timeout.src == BLE_GAP_TIMEOUT_SRC_ADVERTISING) {
00155                 nRF51Gap::getInstance().processEvent(GapEvents::GAP_EVENT_TIMEOUT);
00156             }
00157             break;
00158 
00159         case BLE_GATTC_EVT_TIMEOUT:
00160         case BLE_GATTS_EVT_TIMEOUT:
00161             // Disconnect on GATT Server and Client timeout events.
00162             // ASSERT_STATUS_RET_VOID (sd_ble_gap_disconnect(m_conn_handle,
00163             // BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION));
00164             break;
00165 
00166         case BLE_GAP_EVT_ADV_REPORT: {
00167             const ble_gap_evt_adv_report_t *advReport = &p_ble_evt->evt.gap_evt.params.adv_report;
00168             nRF51Gap::getInstance().processAdvertisementReport(advReport->peer_addr.addr,
00169                                                                advReport->rssi,
00170                                                                advReport->scan_rsp,
00171                                                                static_cast<Gap::AdvertisementType_t>(advReport->type),
00172                                                                advReport->dlen,
00173                                                                advReport->data);
00174             break;
00175         }
00176 
00177         default:
00178             break;
00179     }
00180 
00181     nRF51GattServer::getInstance().hwCallback(p_ble_evt);
00182 }
00183 
00184 /*! @brief      Callback when an error occurs inside the SoftDevice */
00185 void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name)
00186 {
00187     ASSERT(false, (void) 0);
00188 }
00189 
00190 /*!
00191     @brief      Handler for general errors above the SoftDevice layer.
00192                 Typically we can' recover from this so we do a reset.
00193 */
00194 void app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t *p_file_name)
00195 {
00196     ASSERT_STATUS_RET_VOID( error_code );
00197     NVIC_SystemReset();
00198 }