main.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 "mbed.h"
00018 #include "ble/BLE.h"
00019 #include "ble/services/URIBeaconConfigService.h"
00020 #include "ble/services/DFUService.h"
00021 #include "ble/services/DeviceInformationService.h"
00022 #include "ConfigParamsPersistence.h"
00023 
00024 URIBeaconConfigService *uriBeaconConfig;
00025 
00026 /**
00027  * URIBeaconConfig service can operate in two modes: a configuration mode which
00028  * allows a user to update settings over a connection; and normal URIBeacon mode
00029  * which involves advertising a URI. Constructing an object from URIBeaconConfig
00030  * service sets up advertisements for the configuration mode. It is then up to
00031  * the application to switch to URIBeacon mode based on some timeout.
00032  *
00033  * The following help with this switch.
00034  */
00035 static const int CONFIG_ADVERTISEMENT_TIMEOUT_SECONDS = 60;  // Duration after power-on that config service is available.
00036 Ticker configAdvertisementTimeoutTicker;
00037 
00038 /**
00039  * Stop advertising the UriBeaconConfig Service after a delay; and switch to normal URIBeacon.
00040  */
00041 void timeout(void)
00042 {
00043     Gap::GapState_t state;
00044     BLE& ble = BLE::Instance(BLE::DEFAULT_INSTANCE);
00045 
00046     state = ble.getGapState();
00047     if (!state.connected) { /* don't switch if we're in a connected state. */
00048         uriBeaconConfig->setupURIBeaconAdvertisements();
00049         ble.startAdvertising();
00050 
00051         configAdvertisementTimeoutTicker.detach(); /* disable the callback from the timeout Ticker. */
00052     }
00053 }
00054 
00055 /**
00056  * Callback triggered upon a disconnection event. Needs to re-enable advertisements.
00057  */
00058 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *)
00059 {
00060     BLE& ble = BLE::Instance(BLE::DEFAULT_INSTANCE);
00061     ble.startAdvertising();
00062 }
00063 
00064 void bleInitComplete(BLE::InitializationCompleteCallbackContext *context)
00065 {
00066     BLE &ble          = context->ble;
00067 
00068     if (context->error != BLE_ERROR_NONE) {
00069         return;
00070     }
00071 
00072     ble.onDisconnection(disconnectionCallback);
00073 
00074     /*
00075      * Load parameters from (platform specific) persistent storage. Parameters
00076      * can be set to non-default values while the URIBeacon is in configuration
00077      * mode (within the first 60 seconds of power-up). Thereafter, parameters
00078      * get copied out to persistent storage before switching to normal URIBeacon
00079      * operation.
00080      */
00081     URIBeaconConfigService::Params_t params;
00082     bool fetchedFromPersistentStorage = loadURIBeaconConfigParams(&params);
00083 
00084     /* Initialize a URIBeaconConfig service providing config params, default URI, and power levels. */
00085     static URIBeaconConfigService::PowerLevels_t defaultAdvPowerLevels = {-20, -4, 0, 10}; // Values for ADV packets related to firmware levels
00086     uriBeaconConfig = new URIBeaconConfigService(ble, params, !fetchedFromPersistentStorage, "http://uribeacon.org", defaultAdvPowerLevels);
00087     if (!uriBeaconConfig->configuredSuccessfully()) {
00088         error("failed to accommodate URI");
00089     }
00090     configAdvertisementTimeoutTicker.attach(timeout, CONFIG_ADVERTISEMENT_TIMEOUT_SECONDS);
00091 
00092     // Setup auxiliary services to allow over-the-air firmware updates, etc
00093     DFUService dfu(ble);
00094     DeviceInformationService deviceInfo(ble, "ARM", "UriBeacon", "SN1", "hw-rev1", "fw-rev1", "soft-rev1");
00095 
00096     ble.startAdvertising(); /* Set the whole thing in motion. After this call a GAP central can scan the URIBeaconConfig
00097                              * service. This can then be switched to the normal URIBeacon functionality after a timeout. */
00098 }
00099 
00100 int main(void)
00101 {
00102     BLE& ble = BLE::Instance(BLE::DEFAULT_INSTANCE);
00103     ble.init(bleInitComplete);
00104 
00105     /* SpinWait for initialization to complete. This is necessary because the
00106      * BLE object is used in the main loop below. */
00107     while (!ble.hasInitialized()) { /* spin loop */ }
00108 
00109     while (true) {
00110         ble.waitForEvent();
00111     }
00112 }