/**
 * @file CosaDS1302.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
 * Demonstration of Cosa DS1302 Trickle-Charge Timekeeping Chip,
 * device driver.
 *
 * @section Circuit
 * @code
 *                         DS1302/rtc
 *                       +------------+
 * (VCC)---------------1-|VCC         |
 * (GND)---------------2-|GND         |
 * (D2)----------------3-|CLK         |
 * (D3)----------------4-|DAT         |
 * (D4)----------------5-|RST         |
 *                       +------------+
 * @endcode
 *
 * This file is part of the Arduino Che Cosa project.
 */

#include <DS1302.h>

#include "Cosa/Watchdog.hh"
#include "Cosa/UART.hh"
#include "Cosa/Trace.hh"

DS1302 rtc;

void setup()
{
  uart.begin(9600);
  trace.begin(&uart, PSTR("CosaDS1302: started"));
  Watchdog::begin();

  // Read device registers
  trace << PSTR("RTC") << endl;
  for (uint8_t addr = 0; addr < 8; addr++)
    trace << addr << PSTR(": ")
	  << hex << rtc.read(addr)
	  << endl;

  // Read device static memory
  trace << PSTR("RAM") << endl;
  for (uint8_t addr = 0; addr < DS1302::RAM_MAX; addr++)
    trace << addr << PSTR(": ")
	  << hex << rtc.read(DS1302::RAM_START + addr)
	  << endl;

  // Write some data
  uint32_t key = 0x12345678UL;
  rtc.write_ram(&key, sizeof(key));

  // Burst read and check
  rtc.read_ram(&key, sizeof(key));
  trace << PSTR("RAM:") << hex << key << endl;
  ASSERT(key == 0x12345678UL);

  // Set the clock and calender
#if defined(SET_RTC)
  time_t now;
  now.seconds = 0x00;
  now.minutes = 0x00;
  now.hours = 0x21;
  now.date = 0x18;
  now.month = 0x04;
  now.day = 0x05;
  now.year = 0x14;
  rtc.set_time(now);
#endif
}

void loop()
{
  // Read ream
  trace << PSTR("RAM:") << endl;
  uint8_t buf[DS1302::RAM_MAX];
  rtc.read_ram(buf, sizeof(buf));
  trace.print(0L, buf, sizeof(buf), IOStream::hex);
  trace.flush();

  // Read clock and calender; low and high level
  time_t now;
  rtc.get_time(now);
  now.to_binary();
  trace << PSTR("RTC: ") << now << endl;
  trace.flush();

  // Update ram; increment
  for (uint8_t i = 0; i < sizeof(buf); i++) buf[i]++;
  rtc.write_ram(buf, sizeof(buf));

  // Take a nap
  sleep(5);
}