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 "app_timer.h "
00021 #include "btle.h"
00022 
00023 #include "ble_stack_handler_types.h "
00024 #include "ble_radio_notification.h "
00025 #include "ble_flash.h "
00026 #if NEED_BOND_MANAGER
00027 #include "ble_bondmngr.h"
00028 #endif
00029 #include "ble_conn_params.h "
00030 
00031 #include "btle_gap.h"
00032 #include "btle_advertising.h"
00033 #include "custom/custom_helper.h"
00034 
00035 #include "softdevice_handler.h "
00036 #include "pstorage.h "
00037 
00038 #include "GapEvents.h"
00039 #include "nRF51Gap.h"
00040 #include "nRF51GattServer.h"
00041 
00042 #include "ble_hci.h"
00043 
00044 #if NEED_BOND_MANAGER /* disabled by default */
00045 static void service_error_callback(uint32_t nrf_error);
00046 #endif
00047 extern "C" void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name);
00048 void            app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t *p_file_name);
00049 
00050 #if NEED_BOND_MANAGER /* disabled by default */
00051 static error_t bond_manager_init(void);
00052 #endif
00053 
00054 static void btle_handler(ble_evt_t *p_ble_evt);
00055 
00056 static void sys_evt_dispatch(uint32_t sys_evt)
00057 {
00058 #if NEED_PSTORAGE /* disabled by default */
00059     pstorage_sys_event_handler(sys_evt);
00060 #endif
00061 }
00062 
00063 error_t btle_init(void)
00064 {
00065     const bool useScheduler = false;
00066     SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_RC_250_PPM_4000MS_CALIBRATION, useScheduler);
00067 
00068     // Enable BLE stack
00069     /**
00070      * Using this call, the application can select whether to include the
00071      * Service Changed characteristic in the GATT Server. The default in all
00072      * previous releases has been to include the Service Changed characteristic,
00073      * but this affects how GATT clients behave. Specifically, it requires
00074      * clients to subscribe to this attribute and not to cache attribute handles
00075      * between connections unless the devices are bonded. If the application
00076      * does not need to change the structure of the GATT server attributes at
00077      * runtime this adds unnecessary complexity to the interaction with peer
00078      * clients. If the SoftDevice is enabled with the Service Changed
00079      * Characteristics turned off, then clients are allowed to cache attribute
00080      * handles making applications simpler on both sides.
00081      */
00082     static const bool IS_SRVC_CHANGED_CHARACT_PRESENT = false;
00083     ble_enable_params_t enableParams = {
00084         .gatts_enable_params = {
00085             .service_changed = IS_SRVC_CHANGED_CHARACT_PRESENT
00086         }
00087     };
00088     if (sd_ble_enable(&enableParams) != NRF_SUCCESS) {
00089         return ERROR_INVALID_PARAM;
00090     }
00091 
00092     ble_gap_addr_t addr;
00093     if (sd_ble_gap_address_get(&addr) != NRF_SUCCESS) {
00094         return ERROR_INVALID_PARAM;
00095     }
00096     if (sd_ble_gap_address_set(BLE_GAP_ADDR_CYCLE_MODE_NONE, &addr) != NRF_SUCCESS) {
00097         return ERROR_INVALID_PARAM;
00098     }
00099 
00100     ASSERT_STATUS( softdevice_ble_evt_handler_set(btle_handler));
00101     ASSERT_STATUS( softdevice_sys_evt_handler_set(sys_evt_dispatch));
00102 
00103 #if NEED_BOND_MANAGER /* disabled by default */
00104     bond_manager_init();
00105 #endif
00106     btle_gap_init();
00107 
00108     return ERROR_NONE;
00109 }
00110 
00111 static void btle_handler(ble_evt_t *p_ble_evt)
00112 {
00113     /* Library service handlers */
00114 #if NEED_BOND_MANAGER /* disabled by default */
00115     ble_bondmngr_on_ble_evt(p_ble_evt);
00116 #endif
00117 #if SDK_CONN_PARAMS_MODULE_ENABLE
00118     ble_conn_params_on_ble_evt(p_ble_evt);
00119 #endif
00120 
00121     /* Custom event handler */
00122     switch (p_ble_evt->header.evt_id) {
00123         case BLE_GAP_EVT_CONNECTED: {
00124             Gap::Handle_t handle = p_ble_evt->evt.gap_evt.conn_handle;
00125             nRF51Gap::getInstance().setConnectionHandle(handle);
00126             const Gap::ConnectionParams_t *params = reinterpret_cast<Gap::ConnectionParams_t *>(&(p_ble_evt->evt.gap_evt.params.connected.conn_params));
00127             nRF51Gap::getInstance().processConnectionEvent(handle, params);
00128             break;
00129         }
00130 
00131         case BLE_GAP_EVT_DISCONNECTED: {
00132             Gap::Handle_t handle = p_ble_evt->evt.gap_evt.conn_handle;
00133             // Since we are not in a connection and have not started advertising,
00134             // store bonds
00135             nRF51Gap::getInstance().setConnectionHandle (BLE_CONN_HANDLE_INVALID);
00136 #if NEED_BOND_MANAGER /* disabled by default */
00137             ASSERT_STATUS_RET_VOID ( ble_bondmngr_bonded_centrals_store());
00138 #endif
00139 
00140             if (p_ble_evt->evt.gap_evt.params.disconnected.reason == BLE_HCI_LOCAL_HOST_TERMINATED_CONNECTION) {
00141                 nRF51Gap::getInstance().processDisconnectionEvent(handle, Gap::LOCAL_HOST_TERMINATED_CONNECTION);
00142             } else if (p_ble_evt->evt.gap_evt.params.disconnected.reason == BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION) {
00143                 nRF51Gap::getInstance().processDisconnectionEvent(handle, Gap::REMOTE_USER_TERMINATED_CONNECTION);
00144             } else {
00145                 nRF51Gap::getInstance().processDisconnectionEvent(handle, Gap::CONN_INTERVAL_UNACCEPTABLE);
00146             }
00147             break;
00148         }
00149 
00150         case BLE_GAP_EVT_SEC_PARAMS_REQUEST: {
00151             ble_gap_sec_params_t sec_params = {0};
00152 
00153             sec_params.timeout      = 30; /*< Timeout for Pairing Request or
00154                                    * Security Request (in seconds). */
00155             sec_params.bond         = 1;  /**< Perform bonding. */
00156             sec_params.mitm         = CFG_BLE_SEC_PARAM_MITM;
00157             sec_params.io_caps      = CFG_BLE_SEC_PARAM_IO_CAPABILITIES;
00158             sec_params.oob          = CFG_BLE_SEC_PARAM_OOB;
00159             sec_params.min_key_size = CFG_BLE_SEC_PARAM_MIN_KEY_SIZE;
00160             sec_params.max_key_size = CFG_BLE_SEC_PARAM_MAX_KEY_SIZE;
00161 
00162             ASSERT_STATUS_RET_VOID(sd_ble_gap_sec_params_reply(nRF51Gap::getInstance().getConnectionHandle(),
00163                                                                BLE_GAP_SEC_STATUS_SUCCESS, &sec_params));
00164         }
00165         break;
00166 
00167         case BLE_GAP_EVT_TIMEOUT:
00168             if (p_ble_evt->evt.gap_evt.params.timeout.src == BLE_GAP_TIMEOUT_SRC_ADVERTISEMENT) {
00169                 nRF51Gap::getInstance().processEvent(GapEvents::GAP_EVENT_TIMEOUT);
00170             }
00171             break;
00172 
00173         case BLE_GATTC_EVT_TIMEOUT:
00174         case BLE_GATTS_EVT_TIMEOUT:
00175             // Disconnect on GATT Server and Client timeout events.
00176             // ASSERT_STATUS_RET_VOID (sd_ble_gap_disconnect(m_conn_handle,
00177             // BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION));
00178             break;
00179 
00180         default:
00181             break;
00182     }
00183 
00184     nRF51GattServer::getInstance().hwCallback(p_ble_evt);
00185 }
00186 
00187 #if NEED_BOND_MANAGER /* disabled by default */
00188 /**************************************************************************/
00189 /*!
00190     @brief      Initialises the bond manager
00191 
00192     @note       Bond data will be cleared on reset if the bond delete
00193                 button is pressed during initialisation (the button is
00194                 defined as CFG_BLE_BOND_DELETE_BUTTON_NUM).
00195 
00196     @returns
00197 */
00198 /**************************************************************************/
00199 static error_t bond_manager_init(void)
00200 {
00201     ble_bondmngr_init_t bond_para = {0};
00202 
00203     ASSERT_STATUS ( pstorage_init());
00204 
00205     bond_para.flash_page_num_bond     = CFG_BLE_BOND_FLASH_PAGE_BOND;
00206     bond_para.flash_page_num_sys_attr = CFG_BLE_BOND_FLASH_PAGE_SYS_ATTR;
00207     //bond_para.bonds_delete            = boardButtonCheck(CFG_BLE_BOND_DELETE_BUTTON_NUM) ;
00208     bond_para.evt_handler   = NULL;
00209     bond_para.error_handler = service_error_callback;
00210 
00211     ASSERT_STATUS( ble_bondmngr_init( &bond_para ));
00212 
00213     /* Init radio active/inactive notification to flash (to only perform flashing when the radio is inactive) */
00214     //  ASSERT_STATUS( ble_radio_notification_init(NRF_APP_PRIORITY_HIGH,
00215     //                                             NRF_RADIO_NOTIFICATION_DISTANCE_4560US,
00216     //                                             ble_flash_on_radio_active_evt) );
00217 
00218     return ERROR_NONE;
00219 }
00220 #endif // #if NEED_BOND_MANAGER
00221 
00222 #if NEED_BOND_MANAGER /* disabled by default */
00223 /**************************************************************************/
00224 /*!
00225     @brief
00226     @param[in]  nrf_error
00227     @returns
00228 */
00229 /**************************************************************************/
00230 static void service_error_callback(uint32_t nrf_error)
00231 {
00232     ASSERT_STATUS_RET_VOID( nrf_error );
00233 }
00234 #endif // #if NEED_BOND_MANAGER
00235 
00236 /**************************************************************************/
00237 /*!
00238     @brief      Callback when an error occurs inside the SoftDevice
00239 
00240     @param[in]  line_num
00241     @param[in]  p-file_name
00242 
00243     @returns
00244 */
00245 /**************************************************************************/
00246 void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name)
00247 {
00248     ASSERT(false, (void) 0);
00249 }
00250 
00251 /**************************************************************************/
00252 /*!
00253     @brief      Handler for general errors above the SoftDevice layer.
00254                 Typically we can' recover from this so we do a reset.
00255 
00256     @param[in]  error_code
00257     @param[in]  line_num
00258     @param[in]  p-file_name
00259 
00260     @returns
00261 */
00262 /**************************************************************************/
00263 void app_error_handler(uint32_t       error_code,
00264                        uint32_t       line_num,
00265                        const uint8_t *p_file_name)
00266 {
00267     ASSERT_STATUS_RET_VOID( error_code );
00268     NVIC_SystemReset();
00269 }