RCSwitch.h

/*
  RCSwitch - Arduino libary for remote control outlet switches
  Copyright (c) 2011 Suat Özgür.  All right reserved.

  Contributors:
  - Andre Koehler / info(at)tomate-online(dot)de
  - Gordeev Andrey Vladimirovich / gordeev(at)openpyro(dot)com
  - Skineffect / http://forum.ardumote.com/viewtopic.php?f=2&t=46
  - Dominik Fischer / dom_fischer(at)web(dot)de
  - Frank Oltmanns / <first name>.<last name>(at)gmail(dot)com
  - Max Horn / max(at)quendi(dot)de
  - Robert ter Vehn / <first name>.<last name>(at)gmail(dot)com
  
  Project home: https://github.com/sui77/rc-switch/

  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
*/
#ifndef _RCSwitch_h
#define _RCSwitch_h

#if defined(ARDUINO) && ARDUINO >= 100
    #include "Arduino.h"
#elif defined(ENERGIA) // LaunchPad, FraunchPad and StellarPad specific
    #include "Energia.h"
#elif defined(RPI) // Raspberry Pi
    #define RaspberryPi
    // PROGMEM och _P functions are for AVR based microprocessors,
    // so we must normalize these for the ARM processor:
    #define PROGMEM
    #define memcpy_P(dest, src, num) memcpy((dest), (src), (num))
    // Include libraries for RPi:
    #include <string.h> /* memcpy */
    #include <stdlib.h> /* abs */
    #include <stddef.h> /* NULL */
    #include <wiringPi.h>
    #include <stdint.h>
    #define CHANGE 1
    // The following typedefs are needed to be able to compile RCSwitch.cpp
    // with the RPi C++ compiler (g++)
    #ifdef __cplusplus
        extern "C"{
    #endif
        typedef uint8_t boolean;
        typedef uint8_t byte;
    #ifdef __cplusplus
    }
    #endif
    // Last line within Raspberry Pi block
#else
    #include "WProgram.h"
#endif


// At least for the ATTiny X4/X5, receiving has to be disabled due to
// missing libm depencies (udivmodhi4)
#if defined( __AVR_ATtinyX5__ ) or defined ( __AVR_ATtinyX4__ )
#define RCSwitchDisableReceiving
#endif

// Number of maximum High/Low changes per packet.
// We can handle up to (unsigned long) => 32 bit * 2 H/L changes per bit + 2 for sync
#define RCSWITCH_MAX_CHANGES 67

class RCSwitch {

  public:
    RCSwitch();
    
    void switchOn(int nGroupNumber, int nSwitchNumber);
    void switchOff(int nGroupNumber, int nSwitchNumber);
    void switchOn(const char* sGroup, int nSwitchNumber);
    void switchOff(const char* sGroup, int nSwitchNumber);
    void switchOn(char sFamily, int nGroup, int nDevice);
    void switchOff(char sFamily, int nGroup, int nDevice);
    void switchOn(const char* sGroup, const char* sDevice);
    void switchOff(const char* sGroup, const char* sDevice);
    void switchOn(char sGroup, int nDevice);
    void switchOff(char sGroup, int nDevice);

    void sendTriState(const char* Code);
    void send(unsigned long Code, unsigned int length);
    void send(const char* Code);
    
    #if not defined( RCSwitchDisableReceiving )
    void enableReceive(int pinNumber);
    void enableReceive();
    void disableReceive();
    bool available();
    void resetAvailable();

    unsigned long getReceivedValue();
    unsigned int getReceivedBitlength();
    unsigned int getReceivedDelay();
    unsigned int getReceivedProtocol();
    unsigned int* getReceivedRawdata();
    #endif
  
    void enableTransmit(int nTransmitterPin);
    void disableTransmit();
    void setPulseLength(int nPulseLength);
    void setRepeatTransmit(int nRepeatTransmit);
    #if not defined( RCSwitchDisableReceiving )
    void setReceiveTolerance(int nPercent);
    #endif

    struct HighLow {
        byte high;
        byte low;
    };

    struct Protocol {
        int pulseLength;
        HighLow syncFactor;
        HighLow zero;
        HighLow one;
    };

    void setProtocol(Protocol protocol);
    void setProtocol(int nProtocol);
    void setProtocol(int nProtocol, int nPulseLength);

  private:
    char* getCodeWordB(int nGroupNumber, int nSwitchNumber, boolean bStatus);
    char* getCodeWordA(const char* sGroup, int nSwitchNumber, boolean bStatus);
    char* getCodeWordA(const char* sGroup, const char* sDevice, boolean bStatus);
    char* getCodeWordC(char sFamily, int nGroup, int nDevice, boolean bStatus);
    char* getCodeWordD(char group, int nDevice, boolean bStatus);
    void sendT0();
    void sendT1();
    void sendTF();
    void send0();
    void send1();
    void sendSync();
    void transmit(int nHighPulses, int nLowPulses);
    void transmit(HighLow pulses);

    static char* dec2binWcharfill(unsigned long dec, unsigned int length, char fill);
    
    #if not defined( RCSwitchDisableReceiving )
    static IRAM_ATTR void handleInterrupt();
    static IRAM_ATTR bool receiveProtocol(const int p, unsigned int changeCount);
    int nReceiverInterrupt;
    #endif
    int nTransmitterPin;
    int nRepeatTransmit;
    
    Protocol protocol;

    #if not defined( RCSwitchDisableReceiving )
    static int nReceiveTolerance;
    static unsigned long nReceivedValue;
    static unsigned int nReceivedBitlength;
    static unsigned int nReceivedDelay;
    static unsigned int nReceivedProtocol;
    const static unsigned int nSeparationLimit;
    /* 
     * timings[0] contains sync timing, followed by a number of bits
     */
    static unsigned int timings[RCSWITCH_MAX_CHANGES];
    #endif

    
};

#endif