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///////////////////////////////////////////////////////////////////////////////
//  arduino_master.cpp - Home automation library
//
//  Copyright (C) 2009 Jochen Toppe <jochen@jtoee.com>. All right reserved.
//
//  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.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
///////////////////////////////////////////////////////////////////////////////

//
// If the user sends a "p" to the arduino via the serial port a pulse
// command is sent to device two, port two.
//
// All incoming commands for this device id (0x5) are printed to the
// serial port in human-readable form. This configured as "slave", meaning
// the backpack will only pick up commands for the specified device id, unline
// in master mode where it picks everything up.
//

// important -- must include Wire.h first
#include <Wire.h>
// then the rf link libary
#include <RfLink.h>

//
// Handle external RF commands.
//
void handleIncomingCommand(struct Command *cmd) 
{
   Serial.println("Got external command from device");
   Serial.print("  Source Device: ");Serial.println(cmd->sourceDevice, DEC); 
   Serial.print("  Target Device: ");Serial.println(cmd->targetDevice, DEC); 
   Serial.print("  Command: ");Serial.println(cmd->command, DEC); 
   Serial.print("  Data Size: ");Serial.println(cmd->dataSize, DEC); 
   uint8_t i = 0;
   for(; i < cmd->dataSize; i++) {
     Serial.print("  Data: ");Serial.println(cmd->data[i], DEC); 
   }
}

//
// set everything up
//
void setup()   {                    
   // register the call-back for incoming commands
   RfLink.onReceive(handleIncomingCommand);
   // start the serial port
   Serial.begin(57600);     
   // start the RfLink (must-have!)
   RfLink.begin(0x5);
}

////////////////////////////////////////////////////////////

// a byte to store incoming communication
uint8_t sByte;

//
// repeat
//
void loop()                     
{  
   // data available from computer?
  if (Serial.available()) {
    // read the incoming byte from the serial port
    sByte = Serial.read(); 
    if(sByte == 'p') {
        Serial.println("sending pulse");     
        RfLink.pulse(2 /* device two */, 2 /* port 2 */, 100);
    } 
    // check if we got any commands    
  }
  

  // Since the communication between the Arduino and the attiny rf controller
  // on its back is via TWI, the Arduino as the TWI master has to initiate the 
  // communication to see whether commands where received.
  //
  // The following call will poll the slave to grab any incoming commands.
  //
  // This has to be called in a loop. If this is not called, the slave will drop
  // wireless commands waiting for the Arduino to pick the current one up.  
  RfLink.pollSlave();
}