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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 "mbed.h"
#include "BLEDevice.h"

BLEDevice ble;

#define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console;
                               * it will have an impact on code-size and power consumption. */

#if NEED_CONSOLE_OUTPUT
Serial  pc(USBTX, USBRX);
#define DEBUG(...) { pc.printf(__VA_ARGS__); }
#else
#define DEBUG(...) /* nothing */
#endif /* #if NEED_CONSOLE_OUTPUT */

/*
 * For this demo application, populate the beacon advertisement payload
 * with 2 AD structures: FLAG and MSD (manufacturer specific data).
 *
 * Reference:
 *  Bluetooth Core Specification 4.0 (Vol. 3), Part C, Section 11, 18
 */

/*
 * The Beacon payload (encapsulated within the MSD advertising data structure)
 * has the following composition:
 * 128-Bit UUID = E2 0A 39 F4 73 F5 4B C4 A1 2F 17 D1 AD 07 A9 61
 * Major/Minor  = 0000 / 0000
 * Tx Power     = C8
 */
const uint8_t beaconPayload[] = {
    0x4C, 0x00, // Company identifier code (0x004C == Apple)
    0x02,       // ID
    0x15,       // length of the remaining payload
    0xE2, 0x0A, 0x39, 0xF4, 0x73, 0xF5, 0x4B, 0xC4, // location UUID
    0xA1, 0x2F, 0x17, 0xD1, 0xAD, 0x07, 0xA9, 0x61,
    0x00, 0x00, // the major value to differentiate a location
    0x00, 0x00, // the minor value to differentiate a location
    0xC8        // 2's complement of the Tx power (-56dB)
};

int main(void)
{
    DEBUG("Initialising BTLE transport\n\r");
    ble.init();

    ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
    ble.accumulateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, beaconPayload, sizeof(beaconPayload));

    ble.setAdvertisingType(GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED);
    ble.setAdvertisingInterval(1600); /* 1s; in multiples of 0.625ms. */
    ble.startAdvertising();

    for (;;) {
        ble.waitForEvent();
    }

    // An alternative to the above:
    //
    // DigitalOut mainloopLED(LED1);
    // for (;;) {
    //     mainloopLED = !mainloopLED;
    //     ble.waitForEvent();
    // }
}