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 <events/mbed_events.h>
00018 #include "mbed.h"
00019 #include "ble/BLE.h"
00020 #include "ble/services/URIBeaconConfigService.h"
00021 #include "ble/services/DFUService.h"
00022 #include "ble/services/DeviceInformationService.h"
00023 #include "ConfigParamsPersistence.h"
00024 
00025 /**
00026  * URIBeaconConfig service can operate in two modes: a configuration mode which
00027  * allows a user to update settings over a connection; and normal URIBeacon mode
00028  * which involves advertising a URI. Constructing an object from URIBeaconConfig
00029  * service sets up advertisements for the configuration mode. It is then up to
00030  * the application to switch to URIBeacon mode based on some timeout.
00031  *
00032  * The following help with this switch.
00033  */
00034 static const int CONFIG_ADVERTISEMENT_TIMEOUT_SECONDS = 60;  // Duration after power-on that config service is available.
00035 
00036 static EventQueue eventQueue(
00037     /* event count */ 16 * /* event size */ 32
00038 );
00039 
00040 /* global static objects */
00041 BLE ble;
00042 URIBeaconConfigService *uriBeaconConfig;
00043 URIBeaconConfigService::Params_t params;
00044 
00045 /**
00046  * Stop advertising the UriBeaconConfig Service after a delay; and switch to normal URIBeacon.
00047  */
00048 void timeout(void)
00049 {
00050     Gap::GapState_t state;
00051     state = ble.getGapState();
00052     if (!state.connected) { /* don't switch if we're in a connected state. */
00053         uriBeaconConfig->setupURIBeaconAdvertisements();
00054         ble.startAdvertising();
00055     } else {
00056         eventQueue.call_in(CONFIG_ADVERTISEMENT_TIMEOUT_SECONDS * 1000, timeout);
00057     }
00058 }
00059 
00060 /**
00061  * Callback triggered upon a disconnection event. Needs to re-enable advertisements.
00062  */
00063 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *)
00064 {
00065     ble.startAdvertising();
00066 }
00067 
00068 void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
00069     BLE &ble = BLE::Instance();
00070     eventQueue.call(Callback<void()>(&ble, &BLE::processEvents));
00071 }
00072 
00073 int main()
00074 {
00075     ble.onEventsToProcess(scheduleBleEventsProcessing);
00076     ble.init();
00077     ble.onDisconnection(disconnectionCallback);
00078 
00079     /*
00080      * Load parameters from (platform specific) persistent storage. Parameters
00081      * can be set to non-default values while the URIBeacon is in configuration
00082      * mode (within the first 60 seconds of power-up). Thereafter, parameters
00083      * get copied out to persistent storage before switching to normal URIBeacon
00084      * operation.
00085      */
00086     bool fetchedFromPersistentStorage = loadURIBeaconConfigParams(&params);
00087 
00088     /* Initialize a URIBeaconConfig service providing config params, default URI, and power levels. */
00089     static URIBeaconConfigService::PowerLevels_t defaultAdvPowerLevels = {-20, -4, 0, 10}; // Values for ADV packets related to firmware levels
00090     uriBeaconConfig = new URIBeaconConfigService(ble, params, !fetchedFromPersistentStorage, "http://uribeacon.org", defaultAdvPowerLevels);
00091     if (!uriBeaconConfig->configuredSuccessfully()) {
00092         error("failed to accommodate URI");
00093     }
00094 
00095     // Setup auxiliary services to allow over-the-air firmware updates, etc
00096     DFUService *dfu = new DFUService(ble);
00097     DeviceInformationService *deviceInfo = new DeviceInformationService(ble, "ARM", "UriBeacon", "SN1", "hw-rev1", "fw-rev1", "soft-rev1");
00098 
00099     ble.startAdvertising(); /* Set the whole thing in motion. After this call a GAP central can scan the URIBeaconConfig
00100                              * service. This can then be switched to the normal URIBeacon functionality after a timeout. */
00101 
00102     eventQueue.call_in(CONFIG_ADVERTISEMENT_TIMEOUT_SECONDS * 1000, timeout);
00103 
00104     eventQueue.dispatch_forever();
00105 
00106     return 0;
00107 }