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 "LEDService.h"
00021 
00022 DigitalOut alivenessLED(LED1, 0);
00023 DigitalOut actuatedLED(LED2, 0);
00024 
00025 const static char     DEVICE_NAME[] = "LED";
00026 static const uint16_t uuid16_list[] = {LEDService::LED_SERVICE_UUID};
00027 
00028 static EventQueue eventQueue(/* event count */ 10 * EVENTS_EVENT_SIZE);
00029 
00030 LEDService *ledServicePtr;
00031 
00032 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
00033 {
00034     (void) params;
00035     BLE::Instance().gap().startAdvertising();
00036 }
00037 
00038 void blinkCallback(void)
00039 {
00040     alivenessLED = !alivenessLED; /* Do blinky on LED1 to indicate system aliveness. */
00041 }
00042 
00043 /**
00044  * This callback allows the LEDService to receive updates to the ledState Characteristic.
00045  *
00046  * @param[in] params
00047  *     Information about the characterisitc being updated.
00048  */
00049 void onDataWrittenCallback(const GattWriteCallbackParams *params) {
00050     if ((params->handle == ledServicePtr->getValueHandle()) && (params->len == 1)) {
00051         actuatedLED = *(params->data);
00052     }
00053 }
00054 
00055 /**
00056  * This function is called when the ble initialization process has failled
00057  */
00058 void onBleInitError(BLE &ble, ble_error_t error)
00059 {
00060     /* Initialization error handling should go here */
00061 }
00062 
00063 /**
00064  * Callback triggered when the ble initialization process has finished
00065  */
00066 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
00067 {
00068     BLE&        ble   = params->ble;
00069     ble_error_t error = params->error;
00070 
00071     if (error != BLE_ERROR_NONE) {
00072         /* In case of error, forward the error handling to onBleInitError */
00073         onBleInitError(ble, error);
00074         return;
00075     }
00076 
00077     /* Ensure that it is the default instance of BLE */
00078     if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
00079         return;
00080     }
00081 
00082     ble.gap().onDisconnection(disconnectionCallback);
00083     ble.gattServer().onDataWritten(onDataWrittenCallback);
00084 
00085     bool initialValueForLEDCharacteristic = false;
00086     ledServicePtr = new LEDService(ble, initialValueForLEDCharacteristic);
00087 
00088     /* setup advertising */
00089     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
00090     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
00091     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
00092     ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00093     ble.gap().setAdvertisingInterval(1000); /* 1000ms. */
00094     ble.gap().startAdvertising();
00095 }
00096 
00097 void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) {
00098     BLE &ble = BLE::Instance();
00099     eventQueue.call(Callback<void()>(&ble, &BLE::processEvents));
00100 }
00101 
00102 int main()
00103 {
00104     eventQueue.call_every(500, blinkCallback);
00105 
00106     BLE &ble = BLE::Instance();
00107     ble.onEventsToProcess(scheduleBleEventsProcessing);
00108     ble.init(bleInitComplete);
00109 
00110     eventQueue.dispatch_forever();
00111 
00112     return 0;
00113 }