/**
 * @file CosaLCDkeypad.ino
 * @version 1.0
 *
 * @section License
 * Copyright (C) 2013-2015, Mikael Patel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * @section Description
 * Cosa demonstration of LCD Keypad shield handler; Simple trace of
 * callback, on_key_down/up(), with printout of key, name/index, to
 * the LCD as an IOStream.
 *
 * @section Circuit
 * Requires a LCD Keypad shield with 16x2 HD44780 LCD and six buttons.
 *
 * This file is part of the Arduino Che Cosa project.
 */

#include "Cosa/Types.h"
#include "Cosa/Event.hh"
#include "Cosa/Keypad.hh"
#include "Cosa/LCD.hh"
#include "Cosa/IOStream.hh"
#include "Cosa/Watchdog.hh"

#include <HD44780.h>

class KeypadTrace : public LCD::Keypad {
private:
  IOStream m_out;
public:
  KeypadTrace(Job::Scheduler* scheduler, IOStream::Device* dev) :
    LCD::Keypad(scheduler),
    m_out(dev)
  {}

  virtual void on_key_down(uint8_t nr)
  {
    trace(PSTR("down"), nr);
  }

  virtual void on_key_up(uint8_t nr)
  {
    trace(PSTR("up"), nr);
  }

  void trace(str_P msg, uint8_t nr);
};

void
KeypadTrace::trace(str_P msg, uint8_t nr)
{
  m_out << clear;
  switch (nr) {
  case NO_KEY:
    m_out << PSTR("NO_KEY");
    break;
  case SELECT_KEY:
    m_out << PSTR("SELECT_KEY");
    break;
  case LEFT_KEY:
    m_out << PSTR("LEFT_KEY");
    break;
  case DOWN_KEY:
    m_out << PSTR("DOWN_KEY");
    break;
  case UP_KEY:
    m_out << PSTR("UP_KEY");
    break;
  case RIGHT_KEY:
    m_out << PSTR("RIGHT_KEY");
    break;
  }
  m_out << ' ' << msg << endl;
  m_out << PSTR("key = ") << nr;
  m_out << PSTR(" (") << m_key.value() << ')';
}

// The LCD Keypad is a 4-bit parallel device (default pins used)
HD44780::Port4b port;
HD44780 lcd(&port);
Watchdog::Scheduler scheduler;
KeypadTrace keypad(&scheduler, &lcd);

void setup()
{
  Watchdog::begin();
  Watchdog::job(&scheduler);
  keypad.start();
  lcd.begin();
  lcd.puts(PSTR("CosaLCDkeypad: started"));
}

void loop()
{
  Event::service();
}