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main.cpp
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main.cpp
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/* mbed Microcontroller Library
* Copyright (c) 2006-2013 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <events/mbed_events.h>
#include "ble/BLE.h"
#include "gatt_server_process.h"
static EventQueue event_queue(/* event count */ 10 * EVENTS_EVENT_SIZE);
class GattServerDemo : ble::GattServer::EventHandler {
const static uint16_t EXAMPLE_SERVICE_UUID = 0xA000;
const static uint16_t WRITABLE_CHARACTERISTIC_UUID = 0xA001;
public:
GattServerDemo()
{
const UUID uuid = WRITABLE_CHARACTERISTIC_UUID;
_writable_characteristic = new ReadWriteGattCharacteristic<uint8_t> (uuid, &_characteristic_value);
if (!_writable_characteristic) {
printf("Allocation of ReadWriteGattCharacteristic failed\r\n");
}
}
~GattServerDemo()
{
}
void start(BLE &ble, events::EventQueue &event_queue)
{
const UUID uuid = EXAMPLE_SERVICE_UUID;
GattCharacteristic* charTable[] = { _writable_characteristic };
GattService example_service(uuid, charTable, 1);
ble.gattServer().addService(example_service);
ble.gattServer().setEventHandler(this);
printf("Example service added with UUID 0xA000\r\n");
printf("Connect and write to characteristic 0xA001\r\n");
}
private:
/**
* This callback allows the LEDService to receive updates to the ledState Characteristic.
*
* @param[in] params Information about the characterisitc being updated.
*/
virtual void onDataWritten(const GattWriteCallbackParams ¶ms)
{
if ((params.handle == _writable_characteristic->getValueHandle()) && (params.len == 1)) {
printf("New characteristic value written: %x\r\n", *(params.data));
}
}
private:
ReadWriteGattCharacteristic<uint8_t> *_writable_characteristic = nullptr;
uint8_t _characteristic_value = 0;
};
int main()
{
BLE &ble = BLE::Instance();
printf("\r\nGattServer demo of a writable characteristic\r\n");
GattServerDemo demo;
/* this process will handle basic setup and advertising for us */
GattServerProcess ble_process(event_queue, ble);
/* once it's done it will let us continue with our demo*/
ble_process.on_init(callback(&demo, &GattServerDemo::start));
ble_process.start();
return 0;
}