//
//  ViewController.swift
//  Example10
//
// Project: Example10
// Kit: CY8CKIT-021 Sheild
// Baseboard: CY8CKit-44 PSoC4M
//
//  This file contains the viewcontroller for the single view application.
//  Basically when it loads you startup and connect to the bleboard
//  then display the state of things... or let the user flip the switch
//
 
import UIKit
 
class ViewController: UIViewController {
 
    var bleLand : BlueToothNeighborhood!
 
    override func viewDidLoad() {
        super.viewDidLoad()
 
        // bleLand-BlueToothNeighborhood is the model.  It is capable of finding
        // a CY8CKIT021 and connecting to it. It can also read/write etc
        bleLand = BlueToothNeighborhood()
        bleLand.startUpCentralManager()
 
        // start with the switch disabled.  it will turn on once there is a connection
        led0switch.userInteractionEnabled = false
        bootLoaderButton.userInteractionEnabled = false
 
 
        // The global structure CY8CKITNotifications defines the different notificateions
        // that can come from the bleLand model.  Basically a connection/disconnection or
        // and update of the Led0 or Button0 State
 
        // If you get a complete connection then turn on the buttons to start working
        NSNotificationCenter.defaultCenter().addObserverForName(CY8CKIT021Notifications.ConnectionComplete, object: nil, queue: NSOperationQueue.mainQueue()) { _ in
            self.led0switch.userInteractionEnabled = true
            self.bootLoaderButton.userInteractionEnabled = true
        }
 
        // if you get disconnected then turn off the buttons
        NSNotificationCenter.defaultCenter().addObserverForName(CY8CKIT021Notifications.DisconnectedDevice, object: nil, queue: NSOperationQueue.mainQueue()) { _ in
                self.led0switch.userInteractionEnabled = false
                self.bootLoaderButton.userInteractionEnabled = false
            }
 
        // The we got feedback from the model about the state of the button0
        NSNotificationCenter.defaultCenter().addObserverForName(CY8CKIT021Notifications.UpdatedButton0, object: nil, queue: NSOperationQueue.mainQueue()) { _ in self.button0.selected = self.bleLand.button0State }
 
        // The we got feedback from the model about the state of the led0
        NSNotificationCenter.defaultCenter().addObserverForName(CY8CKIT021Notifications.UpdateLed0, object: nil, queue: NSOperationQueue.mainQueue()) { _ in self.updateLed0() }
 
    }

    // This function grabs the current button0 state from the model and sets the button
    // to indicate it is either being pressed or not
    func updateButton0()
    {
        self.button0.selected = self.bleLand.button0State
    }
 
    // This functiong rabs the current led0 state from the model and then flips the 
    // switch the right way
    func updateLed0()
    {
        led0switch.on = bleLand.led0State
    }
 
    @IBOutlet weak var button0: UIButton!
    @IBOutlet weak var led0switch: UISwitch!
 
    // When the user flips the switch you need to write the updated value to the model
    @IBAction func led0SwitchAction(sender: UISwitch) {
 
            bleLand.writeLed0Characteristic(sender.on)
    }
 
    // If the user presses the bootload button then send the bootload command
    // this will cause and immediate BLE disconnect... etc
    @IBOutlet weak var bootLoaderButton: UIButton!
    @IBAction func startBootLoader(sender: AnyObject) {
        bleLand.startBootloader()
    }

// BlueToothNeighborhood.swift
//
// Project: Example10
// Kit: CY8CKIT-021 Sheild
// Baseboard: CY8CKit-44 PSoC4M
//
// This file contains the model for the CY8CKIT021 board with 1 LED0 and 1 Button 0
//
 
import CoreBluetooth
 
 
// This structure conatains the UUIDS for the services and characteristics on the board
// it MUST match what you defined in the creator BLE Configuration Wizard
private struct BLEParameters {
    static let CY8CKIT021Service = CBUUID(string: "00000000-0000-1000-8000-00805F9B3400")
    static let bootloadCharactersticUUID = CBUUID(string:"00000000-0000-1000-8000-00805F9B3401")
    static let ledCharactersticUUID = CBUUID(string:"00000000-0000-1000-8000-00805F9B3402")
    static let buttonCharactersticUUID = CBUUID(string:"00000000-0000-1000-8000-00805F9B3404")
 
}

// The model for the board
// The BlueToothNeighborhood has BOTH the board model and the Bluetooth model.  This
// makes the code slightly simpler to explain but is a bit weird architectururally
class BlueToothNeighborhood: NSObject, CBCentralManagerDelegate, CBPeripheralDelegate  {
 
private var centralManager : CBCentralManager!
private var CY8CKIT021Board : CBPeripheral?
private var CY8CKIT021Service : CBService!
private var led0Characteristic : CBCharacteristic!
private var button0Characteristic : CBCharacteristic!
private var bootloadCharacteristic : CBCharacteristic!
 
// This function is called by the main view controller to get things going
func startUpCentralManager() {
centralManager = CBCentralManager(delegate: self, queue: nil)
}
 
// This is the bluetooth delegate function
@objc func centralManagerDidUpdateState(central: CBCentralManager) {
switch (central.state) {
case .PoweredOff: break
case .PoweredOn:
print("Bluetooth is on - Starting scan")
// start scanning for a device that we can talk to
centralManager.scanForPeripheralsWithServices([BLEParameters.CY8CKIT021Service], options: [CBCentralManagerScanOptionAllowDuplicatesKey:false])
 
case .Resetting: break
case .Unauthorized: break
case .Unknown:break
case .Unsupported:break
}
}
 
// This delegate function is called by the bluetooth when it finds a device
// that matches our UUID that we told it when we started the scan
func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber)
{
// if you already are connected to a device ignore this one
if CY8CKIT021Board == nil {
print("Found a new Periphal advertising CY8CKIT021 Service")
CY8CKIT021Board = peripheral
centralManager.stopScan()
centralManager.connectPeripheral(CY8CKIT021Board!, options: nil)
}
}
 
// This delegate is called when a device connection is complete
func centralManager(central: CBCentralManager, didConnectPeripheral peripheral: CBPeripheral) {
print("Connection complete \(CY8CKIT021Board) \(peripheral)")
CY8CKIT021Board!.delegate = self
CY8CKIT021Board!.discoverServices(nil)
}
 
// This delegate is called after the service discovery is complete
func peripheral(peripheral: CBPeripheral, didDiscoverServices error: NSError?) {
print("discovered services")
for service in peripheral.services! {
print("Found service \(service)")
if service.UUID == BLEParameters.CY8CKIT021Service {
CY8CKIT021Service = service // as! CBService
}
}
CY8CKIT021Board!.discoverCharacteristics(nil, forService: CY8CKIT021Service)
}
 
 
// This delegate is called when the characteristic discovery is complete
func peripheral(peripheral: CBPeripheral, didDiscoverCharacteristicsForService service: CBService, error: NSError?) {
for characteristic in service.characteristics!
{
 
print("Found characteristic \(characteristic)")
switch characteristic.UUID {
case BLEParameters.buttonCharactersticUUID: button0Characteristic = characteristic
case BLEParameters.ledCharactersticUUID: led0Characteristic = characteristic
case BLEParameters.bootloadCharactersticUUID: bootloadCharacteristic = characteristic
default: break
}
}
 
// You have a complete connection... so find out the current state of the LED0
// and Button.. then notify the viewcontroller that things are rolling
 
// read the led0 characteristic to find out its current state
CY8CKIT021Board?.readValueForCharacteristic(led0Characteristic)
 
// read the button0 characteristic to find out its current state
CY8CKIT021Board?.readValueForCharacteristic(button0Characteristic)
 
CY8CKIT021Board!.setNotifyValue(true, forCharacteristic: button0Characteristic)
NSNotificationCenter.defaultCenter().postNotificationName(CY8CKIT021Notifications.ConnectionComplete, object: nil)
}
 
// disconnected device - start scanning again
func centralManager(central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: NSError?) {
print("Disconnected \(peripheral)")
CY8CKIT021Board = nil
NSNotificationCenter.defaultCenter().postNotificationName(CY8CKIT021Notifications.DisconnectedDevice, object: nil)
centralManager.scanForPeripheralsWithServices([BLEParameters.CY8CKIT021Service], options: [CBCentralManagerScanOptionAllowDuplicatesKey:false])
 
}

// start the bootloader...this will cause an immediate disconnect by the board
func startBootloader()
{
var val: UInt8 = 1 // it doesnt matter the value... any write will cause the bootloader to start
let ns = NSData(bytes: &val, length: sizeof(UInt8))
CY8CKIT021Board!.writeValue(ns, forCharacteristic: bootloadCharacteristic, type: CBCharacteristicWriteType.WithResponse)
}
 
 
// a helper function to write the the device
func writeLed0Characteristic(state: Bool)
{
var val : Int8
if(state)
{
val = 1
}
else
{
val = 0
}
let ns = NSData(bytes: &val, length: sizeof(Int8))
CY8CKIT021Board!.writeValue(ns, forCharacteristic: led0Characteristic, type: CBCharacteristicWriteType.WithResponse)
}
 
// this is the model of the board
var button0State : Bool = false 
var led0State : Bool = false // assume that it is off
 
// This delegate function is called when an updated value is received from the Bluetooth Stack
func peripheral(peripheral: CBPeripheral, didUpdateValueForCharacteristic characteristic: CBCharacteristic, error: NSError?) {
if characteristic == button0Characteristic {
var out: UInt8 = 0
characteristic.value!.getBytes(&out, length:sizeof(UInt8))
if(out == 0)
{
button0State = false
}
else
{
button0State = true
}
NSNotificationCenter.defaultCenter().postNotificationName(CY8CKIT021Notifications.UpdatedButton0, object: nil)
}
 
if characteristic == led0Characteristic {
var out: NSInteger = 0
characteristic.value!.getBytes(&out, length:sizeof(UInt8))
if(out == 0)
{
led0State = false
}
else
{
led0State = true
}
NSNotificationCenter.defaultCenter().postNotificationName(CY8CKIT021Notifications.UpdateLed0, object: nil)
}
}