#if !defined(CHIMAERA_H)
#define CHIMAERA_H

#include "utils.h"

struct deviceHeader_t
{
  unsigned char cmd;
  unsigned char dummy;
  unsigned short length;

  static const unsigned char Data = 0x1;
  static const unsigned char DataAcknowledge = 0x2; // Deprecated
  static const unsigned char Status = 0x3;
  static const unsigned char StatusRequest = 0x4;
  static const unsigned char FlushRequest = 0x5;  // Deprecated
  static const unsigned char PacketRequest = 0x6;
  static const unsigned char GenerateLHCbEvent = 0x7;
  static const unsigned char PIOWriteRequest = 0x8;
  static const unsigned char PIOReadRequest = 0x9;
  static const unsigned char GenerateALICEEvent = 0xa;
  static const unsigned char ResetRequest = 0xb;
  static const unsigned char ConfigurationData = 0xc;
  static const unsigned char Int0Enable = 0xd;
  static const unsigned char Int0Disable = 0xe;
  static const unsigned char Int0 = 0xf;
  static const unsigned char GenerateClockBurst = 0x10;
  static const unsigned char ReadAddress = 0x11;
  static const unsigned char Idle = 0xa5;
  static const unsigned char Idle2 = 0x25;
};

struct statusData_t
{
  unsigned char PIO[3];                // Port IO
  unsigned char seq;                   // Sequence counter
  unsigned char parityErrorCount[4];
  unsigned eventCount;
  unsigned bufferCount :24;
  unsigned char rxinhibit :4;
  unsigned char rxerr :4;
  unsigned extra;
  unsigned short ADC[2];
};

struct devicePacket_t
{
  unsigned char cmd;
  unsigned char dummy;
  unsigned short length;
  union
  {
    unsigned char uc[64];
    unsigned short config[2];
    unsigned data[16];
    statusData_t status;
  };
};

typedef void * CBUSBID;

const SI_STATUS SI_WRITE_UNDERRUN = 0xa;

// C-callable interface

int CBUSBOpen( CBUSBID *, char *, unsigned );
int CBUSBClose( CBUSBID );
void CBUSBShowErrorTrace( CBUSBID );
int CBUSBDispatch( CBUSBID, devicePacket_t &, unsigned );
int CBUSBReceive( CBUSBID, devicePacket_t &, unsigned );
int CBUSBDispatchPIOWriteRequest( HANDLE, unsigned );
int CBUSBDispatchClockBurstRequest( CBUSBID, unsigned, unsigned );
int CBUSBDispatchConfiguration( CBUSBID, unsigned, unsigned );
void CBUSBShowLastStatus( CBUSBID, devicePacket_t & );
void CBUSBShowLastData( CBUSBID, devicePacket_t & );
unsigned CBUSBFlushBuffer( CBUSBID, unsigned, bool );

class cbusb
{
 protected:
  HANDLE deviceHandle;
  tracestream errors;
  tracestream trace;

 public:
  cbusb( const char *, unsigned );
  ~cbusb();
  operator void*(){ return errors.tellp() > 0 ? 0 : this; }
  bool operator !(){ return errors.tellp() <= 0 ? false : true; }
  void showErrorTrace();
  void showInfoTrace();

  // Low level message read/write functions

  void dispatch( devicePacket_t &, unsigned );
  void receive( devicePacket_t &, unsigned );

  // Higher level/compound messages

  void dispatchPIOWriteRequest( unsigned );
  void dispatchClockBurstRequest( unsigned, unsigned );
  unsigned flushBuffer( unsigned, bool );
  
  // Utility functions

  void showLastStatus( devicePacket_t & );
  void showLastData( devicePacket_t & );
};

#endif