vrpn_Tng3.h

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#ifndef VRPN_TNG3B_H
#define VRPN_TNG3B_H
#include "vrpn_Analog.h"                // for vrpn_Serial_Analog
#include "vrpn_Button.h"                // for vrpn_Button_Filter
#include "vrpn_Configure.h"             // for VRPN_API
#include "vrpn_Connection.h"            // for vrpn_CONNECTION_LOW_LATENCY, etc
#include "vrpn_Shared.h"                // for timeval
#include "vrpn_Types.h"                 // for vrpn_uint32
 
// TNG stands for "Totally Neat Gadget."
// The TNG3 is an interface device from Mindtel <www.mindtel.com>.
// It is powered by the serial control lines and offers 8 digital 
// and 8 analog inputs.  It costs about $150.
// Written by Rob King at Navy Research Labs.
 
class VRPN_API vrpn_Tng3: public vrpn_Serial_Analog,
             public vrpn_Button_Filter
{
 public:
    vrpn_Tng3 (const char * name, 
               vrpn_Connection * c,
               const char * port, 
               int baud = 19200,         // only speed
               const int numbuttons = 8, 
               const int numchannels = 8);
 
    ~vrpn_Tng3 ()  {};
 
    // Called once through each main loop iteration to handle
    // updates.
    virtual void mainloop (void);
    
 protected:
    int _status;
    int _numbuttons;    // How many buttons to open
    int _numchannels;   // How many analog channels to open
 
    unsigned _num_read;     // How many characters have been read on this report?
    unsigned _expected_chars;   // How many characters to expect in the report
    unsigned char _buffer[512]; // Buffer of characters in report
    unsigned _bufcount;     // How many characters we have so far
 
    struct timeval _timestamp;  // Time of the last report from the device
 
    virtual void clear_values(void);    // Set all buttons, analogs back to 0
    virtual int reset(void);        // Set device back to starting config
    virtual int get_report(void);   // Try to read a report from the device
 
    // send report iff changed
    virtual void report_changes (vrpn_uint32 class_of_service = vrpn_CONNECTION_LOW_LATENCY);
    // send report whether or not changed
    virtual void report (vrpn_uint32 class_of_service = vrpn_CONNECTION_LOW_LATENCY);
 
    // NOTE:  class_of_service is only applied to vrpn_Analog
    //  values, not vrpn_Button or vrpn_Dial
 
 private:
 
// utility routine to sync up the data stream
    int syncDatastream (double seconds);
 
    unsigned char bDataPacketStart;
};
 
#endif