File content as of revision 0:f21dc3a04d62:

/* mbed Microcontroller Library
 * Copyright (c) 2015 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 "ble/BLE.h"
#include "ControllerService.h"
#include "common.h"

/**
 * This program implements a complete HID-over-Gatt Profile:
 *  - HID is provided by ControllerServices
 *  - Battery Service
 *  - Device Information Service
 *
 */

DigitalOut waiting_led(LED1);
DigitalOut connected_led(LED2);


SPISlave arduino(p23, p22, p21, p24);  // mosi, miso, sck, ssel
DigitalOut arduino_int(p25);

BLE ble;
ControllerService *contServicePtr;

static const char DEVICE_NAME[] = "puppeteerPro";
static const char SHORT_DEVICE_NAME[] = "pptPro";

static void onDisconnect(const Gap::DisconnectionCallbackParams_t *params)
{
    HID_DEBUG("disconnected\r\n");
    connected_led = 0;

    ble.gap().startAdvertising(); // restart advertising
}

static void onConnect(const Gap::ConnectionCallbackParams_t *params)
{
    HID_DEBUG("connected\r\n");
    waiting_led = false;
}

static void waiting() {
    if (!contServicePtr->isConnected()) {
        //connected_led = !connected_led;
    }
    else {
        //connected_led = 1;
    }
}

// Current system
// arduino does slave select & interrupt
// arduino transfers
// ble hits isr & records current report
void spi_receive() {
    static uint8_t byte_count = 0;
    static uint8_t current_report[6] = {0};

    if(arduino.receive()) {
        waiting_led = !waiting_led;
        uint8_t resp = arduino.read();
    
        if (resp == 0xFF) {
            byte_count = 0;
            memset(current_report, 0, sizeof(current_report));
        } else {
            current_report[byte_count] = resp;
            byte_count++;
        
            if (byte_count == 6) {
                connected_led = !connected_led;
                contServicePtr->setReport(current_report);
                byte_count = 0;
            }
        }
        arduino.reply(0xAA);

        // finally trigger interrupt to signal receiving
        arduino_int = 0;
        wait_us(100);
        arduino_int = 1;
        wait_us(100);
        arduino_int = 0;
    }
}

int main()
{
    Ticker heartbeat;

    HID_DEBUG("initialising ticker\r\n");

    heartbeat.attach(waiting, 1);

    HID_DEBUG("initialising ble\r\n");
    ble.init();

    ble.gap().onDisconnection(onDisconnect);
    ble.gap().onConnection(onConnect);

    initializeSecurity(ble);

    HID_DEBUG("adding hid service\r\n");
    ControllerService contService(ble);
    contServicePtr = &contService;

    HID_DEBUG("adding device info and battery service\r\n");
    initializeHOGP(ble);

    HID_DEBUG("setting up gap\r\n");
    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GAMEPAD);
    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME,
                                           (const uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
                                           (const uint8_t *)SHORT_DEVICE_NAME, sizeof(SHORT_DEVICE_NAME));

    ble.gap().setDeviceName((const uint8_t *)DEVICE_NAME);

    HID_DEBUG("advertising\r\n");
    ble.gap().startAdvertising();
    
    // Start interrupt sequence for SPI with Arduino
    Ticker spi_thread;
    connected_led = 1;
    arduino_int = 0;
    arduino.reply(0xAA);
    spi_thread.attach(spi_receive, 0.020); // 5ms ticker sequence

    
    while (true) {
        ble.waitForEvent();
    }
}