template for an actuator service

Dependencies:   BLE_API mbed nRF51822

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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 "LEDService.h"
00020 
00021 DigitalOut alivenessLED(LED1, 0);
00022 DigitalOut actuatedLED(LED2, 0);
00023 
00024 const static char     DEVICE_NAME[] = "LED";
00025 static const uint16_t uuid16_list[] = {LEDService::LED_SERVICE_UUID};
00026 
00027 LEDService *ledServicePtr;
00028 
00029 Ticker ticker;
00030 
00031 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
00032 {
00033     BLE::Instance().gap().startAdvertising();
00034 }
00035 
00036 void periodicCallback(void)
00037 {
00038     alivenessLED = !alivenessLED; /* Do blinky on LED1 to indicate system aliveness. */
00039 }
00040 
00041 /**
00042  * This callback allows the LEDService to receive updates to the ledState Characteristic.
00043  *
00044  * @param[in] params
00045  *     Information about the characterisitc being updated.
00046  */
00047 void onDataWrittenCallback(const GattWriteCallbackParams *params) {
00048     if ((params->handle == ledServicePtr->getValueHandle()) && (params->len == 1)) {
00049         actuatedLED = *(params->data);
00050     }
00051 }
00052 
00053 /**
00054  * This function is called when the ble initialization process has failed
00055  */
00056 void onBleInitError(BLE &ble, ble_error_t error)
00057 {
00058     /* Initialization error handling should go here */
00059 }
00060 
00061 /**
00062  * Callback triggered when the ble initialization process has finished
00063  */
00064 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
00065 {
00066     BLE&        ble   = params->ble;
00067     ble_error_t error = params->error;
00068 
00069     if (error != BLE_ERROR_NONE) {
00070         /* In case of error, forward the error handling to onBleInitError */
00071         onBleInitError(ble, error);
00072         return;
00073     }
00074 
00075     /* Ensure that it is the default instance of BLE */
00076     if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
00077         return;
00078     }
00079  
00080     ble.gap().onDisconnection(disconnectionCallback);
00081     ble.gattServer().onDataWritten(onDataWrittenCallback);
00082 
00083     bool initialValueForLEDCharacteristic = false;
00084     ledServicePtr = new LEDService(ble, initialValueForLEDCharacteristic);
00085 
00086     /* setup advertising */
00087     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
00088     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
00089     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
00090     ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00091     ble.gap().setAdvertisingInterval(1000); /* 1000ms. */
00092     ble.gap().startAdvertising();
00093 }
00094 
00095 int main(void)
00096 {
00097     ticker.attach(periodicCallback, 1); /* Blink LED every second */
00098 
00099     BLE &ble = BLE::Instance();
00100     ble.init(bleInitComplete);
00101 
00102     /* SpinWait for initialization to complete. This is necessary because the
00103      * BLE object is used in the main loop below. */
00104     while (ble.hasInitialized()  == false) { /* spin loop */ }
00105 
00106     while (true) {
00107         ble.waitForEvent();
00108     }
00109 }