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_flash.h "
00023 #include "ble_conn_params.h "
00024 
00025 #include "btle_gap.h"
00026 #include "btle_advertising.h"
00027 #include "custom/custom_helper.h"
00028 
00029 #include "ble/GapEvents.h"
00030 #include "nRF5xGap.h"
00031 #include "nRF5xGattServer.h"
00032 #include "nRF5xSecurityManager.h"
00033 
00034 extern "C" {
00035 #include "pstorage.h "
00036 #include "device_manager.h "
00037 #include "softdevice_handler.h "
00038 #include "ble_stack_handler_types.h "
00039 }
00040 
00041 #include "ble_hci.h"
00042 #include "btle_discovery.h"
00043 
00044 extern "C" void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name);
00045 void            app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t *p_file_name);
00046 
00047 static void btle_handler(ble_evt_t *p_ble_evt);
00048 
00049 static void sys_evt_dispatch(uint32_t sys_evt)
00050 {
00051     pstorage_sys_event_handler(sys_evt);
00052 }
00053 
00054 /**
00055  * This function is called in interrupt context to handle BLE events; i.e. pull
00056  * system and user events out of the pending events-queue of the BLE stack. The
00057  * BLE stack signals the availability of events by the triggering the SWI2
00058  * interrupt, which forwards the handling to this function.
00059  *
00060  * The event processing loop is implemented in intern_softdevice_events_execute().
00061  *
00062  * In mbed OS, a callback for intern_softdevice_events_execute() is posted
00063  * to the scheduler, which then executes in thread mode. In mbed-classic,
00064  * event processing happens right-away in interrupt context (which is more
00065  * risk-prone). In either case, the logic of event processing is identical.
00066  */
00067 static uint32_t eventHandler()
00068 {
00069 #ifdef YOTTA_CFG_MBED_OS
00070     minar::Scheduler::postCallback(intern_softdevice_events_execute);
00071 #else
00072     intern_softdevice_events_execute();
00073 #endif
00074 
00075     return NRF_SUCCESS;
00076 }
00077 
00078 error_t btle_init(void)
00079 {
00080     nrf_clock_lfclksrc_t clockSource;
00081     if (NRF_CLOCK->LFCLKSRC & (CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos)) {
00082         clockSource = NRF_CLOCK_LFCLKSRC_XTAL_20_PPM;
00083     } else {
00084         clockSource = NRF_CLOCK_LFCLKSRC_RC_250_PPM_4000MS_CALIBRATION;
00085     }
00086     SOFTDEVICE_HANDLER_INIT(clockSource, eventHandler);
00087 
00088     // Enable BLE stack
00089     /**
00090      * Using this call, the application can select whether to include the
00091      * Service Changed characteristic in the GATT Server. The default in all
00092      * previous releases has been to include the Service Changed characteristic,
00093      * but this affects how GATT clients behave. Specifically, it requires
00094      * clients to subscribe to this attribute and not to cache attribute handles
00095      * between connections unless the devices are bonded. If the application
00096      * does not need to change the structure of the GATT server attributes at
00097      * runtime this adds unnecessary complexity to the interaction with peer
00098      * clients. If the SoftDevice is enabled with the Service Changed
00099      * Characteristics turned off, then clients are allowed to cache attribute
00100      * handles making applications simpler on both sides.
00101      */
00102     static const bool IS_SRVC_CHANGED_CHARACT_PRESENT = true;
00103     ble_enable_params_t enableParams = {
00104         .gatts_enable_params = {
00105             .service_changed = IS_SRVC_CHANGED_CHARACT_PRESENT
00106         }
00107     };
00108     if (sd_ble_enable(&enableParams) != NRF_SUCCESS) {
00109         return ERROR_INVALID_PARAM;
00110     }
00111 
00112     ble_gap_addr_t addr;
00113     if (sd_ble_gap_address_get(&addr) != NRF_SUCCESS) {
00114         return ERROR_INVALID_PARAM;
00115     }
00116     if (sd_ble_gap_address_set(BLE_GAP_ADDR_CYCLE_MODE_NONE, &addr) != NRF_SUCCESS) {
00117         return ERROR_INVALID_PARAM;
00118     }
00119 
00120     ASSERT_STATUS( softdevice_ble_evt_handler_set(btle_handler));
00121     ASSERT_STATUS( softdevice_sys_evt_handler_set(sys_evt_dispatch));
00122 
00123     btle_gap_init();
00124 
00125     return ERROR_NONE;
00126 }
00127 
00128 static void btle_handler(ble_evt_t *p_ble_evt)
00129 {
00130     /* Library service handlers */
00131 #if SDK_CONN_PARAMS_MODULE_ENABLE
00132     ble_conn_params_on_ble_evt(p_ble_evt);
00133 #endif
00134 
00135     dm_ble_evt_handler(p_ble_evt);
00136 
00137 #if !defined(TARGET_MCU_NRF51_16K_S110) && !defined(TARGET_MCU_NRF51_32K_S110)
00138     bleGattcEventHandler(p_ble_evt);
00139 #endif
00140 
00141     /* Custom event handler */
00142     switch (p_ble_evt->header.evt_id) {
00143         case BLE_GAP_EVT_CONNECTED: {
00144             Gap::Handle_t handle = p_ble_evt->evt.gap_evt.conn_handle;
00145 #if defined(TARGET_MCU_NRF51_16K_S110) || defined(TARGET_MCU_NRF51_32K_S110)
00146             /* Only peripheral role is supported by S110 */
00147             Gap::Role_t role = Gap::PERIPHERAL;
00148 #else
00149             Gap::Role_t role = static_cast<Gap::Role_t>(p_ble_evt->evt.gap_evt.params.connected.role);
00150 #endif
00151             nRF5xGap::getInstance().setConnectionHandle(handle);
00152             const Gap::ConnectionParams_t *params = reinterpret_cast<Gap::ConnectionParams_t *>(&(p_ble_evt->evt.gap_evt.params.connected.conn_params));
00153             const ble_gap_addr_t *peer = &p_ble_evt->evt.gap_evt.params.connected.peer_addr;
00154             const ble_gap_addr_t *own  = &p_ble_evt->evt.gap_evt.params.connected.own_addr;
00155             nRF5xGap::getInstance().processConnectionEvent(handle,
00156                                                            role,
00157                                                            static_cast<Gap::AddressType_t>(peer->addr_type), peer->addr,
00158                                                            static_cast<Gap::AddressType_t>(own->addr_type),  own->addr,
00159                                                            params);
00160             break;
00161         }
00162 
00163         case BLE_GAP_EVT_DISCONNECTED: {
00164             Gap::Handle_t handle = p_ble_evt->evt.gap_evt.conn_handle;
00165             // Since we are not in a connection and have not started advertising,
00166             // store bonds
00167             nRF5xGap::getInstance().setConnectionHandle (BLE_CONN_HANDLE_INVALID);
00168 
00169             Gap::DisconnectionReason_t reason;
00170             switch (p_ble_evt->evt.gap_evt.params.disconnected.reason) {
00171                 case BLE_HCI_LOCAL_HOST_TERMINATED_CONNECTION:
00172                     reason = Gap::LOCAL_HOST_TERMINATED_CONNECTION;
00173                     break;
00174                 case BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION:
00175                     reason = Gap::REMOTE_USER_TERMINATED_CONNECTION;
00176                     break;
00177                 case BLE_HCI_CONN_INTERVAL_UNACCEPTABLE:
00178                     reason = Gap::CONN_INTERVAL_UNACCEPTABLE;
00179                     break;
00180                 default:
00181                     /* Please refer to the underlying transport library for an
00182                      * interpretion of this reason's value. */
00183                     reason = static_cast<Gap::DisconnectionReason_t>(p_ble_evt->evt.gap_evt.params.disconnected.reason);
00184                     break;
00185             }
00186             nRF5xGap::getInstance().processDisconnectionEvent(handle, reason);
00187             break;
00188         }
00189 
00190         case BLE_GAP_EVT_PASSKEY_DISPLAY:
00191             nRF5xSecurityManager::getInstance().processPasskeyDisplayEvent(p_ble_evt->evt.gap_evt.conn_handle, p_ble_evt->evt.gap_evt.params.passkey_display.passkey);
00192             break;
00193 
00194         case BLE_GAP_EVT_TIMEOUT:
00195             nRF5xGap::getInstance().processTimeoutEvent(static_cast<Gap::TimeoutSource_t>(p_ble_evt->evt.gap_evt.params.timeout.src));
00196             break;
00197 
00198         case BLE_GATTC_EVT_TIMEOUT:
00199         case BLE_GATTS_EVT_TIMEOUT:
00200             // Disconnect on GATT Server and Client timeout events.
00201             // ASSERT_STATUS_RET_VOID (sd_ble_gap_disconnect(m_conn_handle,
00202             // BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION));
00203             break;
00204 
00205         case BLE_GAP_EVT_ADV_REPORT: {
00206             const ble_gap_evt_adv_report_t *advReport = &p_ble_evt->evt.gap_evt.params.adv_report;
00207             nRF5xGap::getInstance().processAdvertisementReport(advReport->peer_addr.addr,
00208                                                                advReport->rssi,
00209                                                                advReport->scan_rsp,
00210                                                                static_cast<GapAdvertisingParams::AdvertisingType_t>(advReport->type),
00211                                                                advReport->dlen,
00212                                                                advReport->data);
00213             break;
00214         }
00215 
00216         default:
00217             break;
00218     }
00219 
00220     nRF5xGattServer::getInstance().hwCallback(p_ble_evt);
00221 }
00222 
00223 /*! @brief      Callback when an error occurs inside the SoftDevice */
00224 void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name)
00225 {
00226     ASSERT(false, (void) 0);
00227 }
00228 
00229 /*!
00230     @brief      Handler for general errors above the SoftDevice layer.
00231                 Typically we can' recover from this so we do a reset.
00232 */
00233 void app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t *p_file_name)
00234 {
00235     ASSERT_STATUS_RET_VOID( error_code );
00236     NVIC_SystemReset();
00237 }