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 "ble/GapEvents.h"
00034 #include "nRF5xGap.h"
00035 #include "nRF5xGattServer.h"
00036 #include "nRF5xSecurityManager.h"
00037 
00038 #include "device_manager.h "
00039 
00040 #include "ble_hci.h"
00041 #include "btle_discovery.h"
00042 
00043 extern "C" void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name);
00044 void            app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t *p_file_name);
00045 
00046 static void btle_handler(ble_evt_t *p_ble_evt);
00047 
00048 static void sys_evt_dispatch(uint32_t sys_evt)
00049 {
00050     pstorage_sys_event_handler(sys_evt);
00051 }
00052 
00053 /**
00054  * This function is called in interrupt context to handle BLE events; i.e. pull
00055  * system and user events out of the pending events-queue of the BLE stack. The
00056  * BLE stack signals the availability of events by the triggering the SWI2
00057  * interrupt, which forwards the handling to this function.
00058  *
00059  * The event processing loop is implemented in intern_softdevice_events_execute().
00060  *
00061  * In mbed OS, a callback for intern_softdevice_events_execute() is posted
00062  * to the scheduler, which then executes in thread mode. In mbed-classic,
00063  * event processing happens right-away in interrupt context (which is more
00064  * risk-prone). In either case, the logic of event processing is identical.
00065  */
00066 static uint32_t eventHandler()
00067 {
00068 #ifdef YOTTA_CFG_MBED_OS
00069     minar::Scheduler::postCallback(intern_softdevice_events_execute);
00070 #else
00071     intern_softdevice_events_execute();
00072 #endif
00073 
00074     return NRF_SUCCESS;
00075 }
00076 
00077 error_t btle_init(void)
00078 {
00079     nrf_clock_lfclksrc_t clockSource;
00080     if (NRF_CLOCK->LFCLKSRC & (CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos)) {
00081         clockSource = NRF_CLOCK_LFCLKSRC_XTAL_20_PPM;
00082     } else {
00083         clockSource = NRF_CLOCK_LFCLKSRC_RC_250_PPM_4000MS_CALIBRATION;
00084     }
00085     SOFTDEVICE_HANDLER_INIT(clockSource, eventHandler);
00086 
00087     // Enable BLE stack
00088     /**
00089      * Using this call, the application can select whether to include the
00090      * Service Changed characteristic in the GATT Server. The default in all
00091      * previous releases has been to include the Service Changed characteristic,
00092      * but this affects how GATT clients behave. Specifically, it requires
00093      * clients to subscribe to this attribute and not to cache attribute handles
00094      * between connections unless the devices are bonded. If the application
00095      * does not need to change the structure of the GATT server attributes at
00096      * runtime this adds unnecessary complexity to the interaction with peer
00097      * clients. If the SoftDevice is enabled with the Service Changed
00098      * Characteristics turned off, then clients are allowed to cache attribute
00099      * handles making applications simpler on both sides.
00100      */
00101     static const bool IS_SRVC_CHANGED_CHARACT_PRESENT = true;
00102     ble_enable_params_t enableParams = {
00103         .gatts_enable_params = {
00104             .service_changed = IS_SRVC_CHANGED_CHARACT_PRESENT
00105         }
00106     };
00107     if (sd_ble_enable(&enableParams) != NRF_SUCCESS) {
00108         return ERROR_INVALID_PARAM;
00109     }
00110 
00111     ble_gap_addr_t addr;
00112     if (sd_ble_gap_address_get(&addr) != NRF_SUCCESS) {
00113         return ERROR_INVALID_PARAM;
00114     }
00115     if (sd_ble_gap_address_set(BLE_GAP_ADDR_CYCLE_MODE_NONE, &addr) != NRF_SUCCESS) {
00116         return ERROR_INVALID_PARAM;
00117     }
00118 
00119     ASSERT_STATUS( softdevice_ble_evt_handler_set(btle_handler));
00120     ASSERT_STATUS( softdevice_sys_evt_handler_set(sys_evt_dispatch));
00121 
00122     btle_gap_init();
00123 
00124     return ERROR_NONE;
00125 }
00126 
00127 static void btle_handler(ble_evt_t *p_ble_evt)
00128 {
00129     /* Library service handlers */
00130 #if SDK_CONN_PARAMS_MODULE_ENABLE
00131     ble_conn_params_on_ble_evt(p_ble_evt);
00132 #endif
00133 
00134     dm_ble_evt_handler(p_ble_evt);
00135 
00136 #if !defined(MCU_NRF51_16K_S110) && !defined(MCU_NRF51_32K_S110)
00137     bleGattcEventHandler(p_ble_evt);
00138 #endif
00139 
00140     /* Custom event handler */
00141     switch (p_ble_evt->header.evt_id) {
00142         case BLE_GAP_EVT_CONNECTED: {
00143             Gap::Handle_t handle = p_ble_evt->evt.gap_evt.conn_handle;
00144 #if defined(MCU_NRF51_16K_S110) || defined(MCU_NRF51_32K_S110)
00145             /* Only peripheral role is supported by S110 */
00146             Gap::Role_t role = Gap::PERIPHERAL;
00147 #else
00148             Gap::Role_t role = static_cast<Gap::Role_t>(p_ble_evt->evt.gap_evt.params.connected.role);
00149 #endif
00150             nRF5xGap::getInstance().setConnectionHandle(handle);
00151             const Gap::ConnectionParams_t *params = reinterpret_cast<Gap::ConnectionParams_t *>(&(p_ble_evt->evt.gap_evt.params.connected.conn_params));
00152             const ble_gap_addr_t *peer = &p_ble_evt->evt.gap_evt.params.connected.peer_addr;
00153             const ble_gap_addr_t *own  = &p_ble_evt->evt.gap_evt.params.connected.own_addr;
00154             nRF5xGap::getInstance().processConnectionEvent(handle,
00155                                                            role,
00156                                                            static_cast<Gap::AddressType_t>(peer->addr_type), peer->addr,
00157                                                            static_cast<Gap::AddressType_t>(own->addr_type),  own->addr,
00158                                                            params);
00159             break;
00160         }
00161 
00162         case BLE_GAP_EVT_DISCONNECTED: {
00163             Gap::Handle_t handle = p_ble_evt->evt.gap_evt.conn_handle;
00164             // Since we are not in a connection and have not started advertising,
00165             // store bonds
00166             nRF5xGap::getInstance().setConnectionHandle (BLE_CONN_HANDLE_INVALID);
00167 
00168             Gap::DisconnectionReason_t reason;
00169             switch (p_ble_evt->evt.gap_evt.params.disconnected.reason) {
00170                 case BLE_HCI_LOCAL_HOST_TERMINATED_CONNECTION:
00171                     reason = Gap::LOCAL_HOST_TERMINATED_CONNECTION;
00172                     break;
00173                 case BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION:
00174                     reason = Gap::REMOTE_USER_TERMINATED_CONNECTION;
00175                     break;
00176                 case BLE_HCI_CONN_INTERVAL_UNACCEPTABLE:
00177                     reason = Gap::CONN_INTERVAL_UNACCEPTABLE;
00178                     break;
00179                 default:
00180                     /* Please refer to the underlying transport library for an
00181                      * interpretion of this reason's value. */
00182                     reason = static_cast<Gap::DisconnectionReason_t>(p_ble_evt->evt.gap_evt.params.disconnected.reason);
00183                     break;
00184             }
00185             nRF5xGap::getInstance().processDisconnectionEvent(handle, reason);
00186             break;
00187         }
00188 
00189         case BLE_GAP_EVT_PASSKEY_DISPLAY:
00190             nRF5xSecurityManager::getInstance().processPasskeyDisplayEvent(p_ble_evt->evt.gap_evt.conn_handle, p_ble_evt->evt.gap_evt.params.passkey_display.passkey);
00191             break;
00192 
00193         case BLE_GAP_EVT_TIMEOUT:
00194             nRF5xGap::getInstance().processTimeoutEvent(static_cast<Gap::TimeoutSource_t>(p_ble_evt->evt.gap_evt.params.timeout.src));
00195             break;
00196 
00197         case BLE_GATTC_EVT_TIMEOUT:
00198         case BLE_GATTS_EVT_TIMEOUT:
00199             // Disconnect on GATT Server and Client timeout events.
00200             // ASSERT_STATUS_RET_VOID (sd_ble_gap_disconnect(m_conn_handle,
00201             // BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION));
00202             break;
00203 
00204         case BLE_GAP_EVT_ADV_REPORT: {
00205             const ble_gap_evt_adv_report_t *advReport = &p_ble_evt->evt.gap_evt.params.adv_report;
00206             nRF5xGap::getInstance().processAdvertisementReport(advReport->peer_addr.addr,
00207                                                                advReport->rssi,
00208                                                                advReport->scan_rsp,
00209                                                                static_cast<GapAdvertisingParams::AdvertisingType_t>(advReport->type),
00210                                                                advReport->dlen,
00211                                                                advReport->data);
00212             break;
00213         }
00214 
00215         default:
00216             break;
00217     }
00218 
00219     nRF5xGattServer::getInstance().hwCallback(p_ble_evt);
00220 }
00221 
00222 /*! @brief      Callback when an error occurs inside the SoftDevice */
00223 void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name)
00224 {
00225     ASSERT(false, (void) 0);
00226 }
00227 
00228 /*!
00229     @brief      Handler for general errors above the SoftDevice layer.
00230                 Typically we can' recover from this so we do a reset.
00231 */
00232 void app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t *p_file_name)
00233 {
00234     ASSERT_STATUS_RET_VOID( error_code );
00235     NVIC_SystemReset();
00236 }