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nmea.cpp
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nmea.cpp
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/******************************************************************************
*
* Project: OpenCPN
* Purpose: NMEA Data Object
* Author: David Register
*
***************************************************************************
* Copyright (C) 2010 by David S. Register *
*
* Garmin JEEPS Code Copyright (C) 2006 Robert Lipe *
* GPSBabel and JEEPS code are released under GPL V2 *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************
***************************************************************************
* Parts of this file were adapted from source code found in *
* John F. Waers (jfwaers@csn.net) public domain program MacGPS45 *
***************************************************************************
*
*/
#include "wx/wxprec.h"
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif //precompiled headers
#include "wx/tokenzr.h"
#include <wx/datetime.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#include "dychart.h"
#include "nmea.h"
#include "georef.h"
#include "garmin/jeeps/garmin_wrapper.h"
#ifdef BUILD_WITH_LIBGPS
#ifdef __WXOSX__ // begin rdm
#define policy_t gps_policy_t
#include <gps.h>
#undef policy_t
#else
#include <gps.h>
#endif // end rdm
#include <dlfcn.h>
#endif
#define SERIAL_OVERLAPPED
extern int g_nNMEADebug;
extern ComPortManager *g_pCommMan;
extern bool g_bGPSAISMux;
extern int g_total_NMEAerror_messages;
int s_dns_test_flag;
// A static structure storing generic position data
// Used to communicate from NMEA threads to main application thread
static GenericPosDatEx ThreadPositionData;
extern bool g_bDebugGPSD;
extern MyFrame *gFrame;
extern wxString g_GPS_Ident;
#ifdef BUILD_WITH_LIBGPS
struct gps_data_t *(*s_fn_gps_open19)(char *, char *);
int (*s_fn_gps_open)(char *, char *, struct gps_data_t *);
int (*s_fn_gps_close)(struct gps_data_t *);
int (*s_fn_gps_poll)(struct gps_data_t *);
bool (*s_fn_gps_waiting)(struct gps_data_t *, unsigned int);
int (*s_fn_gps_stream)(struct gps_data_t *, unsigned int, void *);
int (*s_fn_gps_read)(struct gps_data_t *);
// libgps.so changes API frequently, and does not try very hard to preserve ABI compatibility.
// One consequence is that the structure "gps_data_t" may be larger than expected
// from the perspective of a dynamically loaded .so library.
// Since we cannot know this at build time, and cannot even detect it at run-time, all we can
// do is over-allocate the storage for our gps_data_t, and hope for the best.
// 2X ought to be enough...
struct gps_data_t gpsd_data;
struct gps_data_t gpsd_data_expander;
#endif
#if !defined(NAN)
static const long long lNaN = 0xfff8000000000000;
#define NAN (*(double*)&lNaN)
#endif
//------------------------------------------------------------------------------
// NMEA Event Implementation
//------------------------------------------------------------------------------
const wxEventType wxEVT_OCPN_NMEA = wxNewEventType();
OCPN_NMEAEvent::OCPN_NMEAEvent( wxEventType commandType, int id )
:wxEvent(id, commandType)
{
}
OCPN_NMEAEvent::~OCPN_NMEAEvent( )
{
}
wxEvent* OCPN_NMEAEvent::Clone() const
{
OCPN_NMEAEvent *newevent=new OCPN_NMEAEvent(*this);
newevent->m_NMEAstring=this->m_NMEAstring.c_str(); // this enforces a deep copy of the string data
return newevent;
}
#ifdef __WXMSW__
class GARMIN_IO_Thread;
//--------------------------------------------------------
// Some Garmin Data Structures and Constants
//--------------------------------------------------------
#define GARMIN_USB_API_VERSION 1
#define GARMIN_USB_MAX_BUFFER_SIZE 4096
#define GARMIN_USB_INTERRUPT_DATA_SIZE 64
#define IOCTL_GARMIN_USB_API_VERSION CTL_CODE \
(FILE_DEVICE_UNKNOWN, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_GARMIN_USB_INTERRUPT_IN CTL_CODE \
(FILE_DEVICE_UNKNOWN, 0x850, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_GARMIN_USB_BULK_OUT_PACKET_SIZE CTL_CODE \
(FILE_DEVICE_UNKNOWN, 0x851, METHOD_BUFFERED, FILE_ANY_ACCESS)
/*
* New packet types in USB.
*/
#define GUSB_SESSION_START 5 /* We request units attention */
#define GUSB_SESSION_ACK 6 /* Unit responds that we have its attention */
#define GUSB_REQUEST_BULK 2 /* Unit requests we read from bulk pipe */
#define GUSB_RESPONSE_PVT 51 /* PVT Data Packet */
#define GUSB_RESPONSE_SDR 114 /* Satellite Data Record Packet */
typedef
union {
struct {
unsigned char type;
unsigned char reserved1;
unsigned char reserved2;
unsigned char reserved3;
unsigned char pkt_id[2];
unsigned char reserved6;
unsigned char reserved7;
unsigned char datasz[4];
unsigned char databuf[5]; /* actually a variable length array... */
} gusb_pkt;
unsigned char dbuf[1024];
} garmin_usb_packet;
typedef struct garmin_unit_info {
unsigned long serial_number;
unsigned long unit_id;
unsigned long unit_version;
char *os_identifier; /* In case the OS has another name for it. */
char *product_identifier; /* From the hardware itself. */
} unit_info_type;
/* Packet structure for Pkt_ID = 51 (PVT Data Record) */
//#pragma pack(push) /* push current alignment to stack */
//#pragma pack(1) /* set alignment to 1 byte boundary */
#pragma pack(push,1) /* push current alignment to stack, set alignment to 1 byte boundary */
typedef struct {
float alt;
float epe;
float eph;
float epv;
short fix;
double tow;
double lat;
double lon;
float east;
float north;
float up;
float msl_hght;
short leap_scnds;
long wn_days;
} D800_Pvt_Data_Type;
#pragma pack(pop) /* restore original alignment from stack */
/* Packet structure for Pkt_ID = 114 (Satellite Data Record) */
typedef struct
{
unsigned char svid; //space vehicle identification (1-32 and 33-64 for WAAS)
short snr; //signal-to-noise ratio
unsigned char elev; //satellite elevation in degrees
short azmth; //satellite azimuth in degrees
unsigned char status; //status bit-field
} cpo_sat_data;
/*
The status bit field represents a set of booleans described below:
Bit Meaning when bit is one (1)
0 The unit has ephemeris data for the specified satellite.
1 The unit has a differential correction for the specified satellite.
2 The unit is using this satellite in the solution.
*/
enum {
rs_fromintr,
rs_frombulk
};
//----------------------------------------------------------------------------
// Garmin Device Monitor Window Definition
//----------------------------------------------------------------------------
class DeviceMonitorWindow: public wxWindow
{
public:
DeviceMonitorWindow(NMEAHandler *parent, wxWindow *MessageTarget, wxMutex *pMutex);
~DeviceMonitorWindow();
void OnClose(wxCloseEvent& event);
WXLRESULT MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam);
void StopIOThread(bool b_pause);
void RestartIOThread(void);
void OnTimerGarmin1(wxTimerEvent& event);
void OnEvtGarmin(GarminEvent &event);
bool FindGarminDeviceInterface();
bool IsGarminPlugged();
HANDLE garmin_usb_start();
bool gusb_syncup(void);
int gusb_win_get(garmin_usb_packet *ibuf, size_t sz);
int gusb_win_get_bulk(garmin_usb_packet *ibuf, size_t sz);
int gusb_win_send(const garmin_usb_packet *opkt, size_t sz);
int gusb_cmd_send(const garmin_usb_packet *opkt, size_t sz);
int gusb_cmd_get(garmin_usb_packet *ibuf, size_t sz);
bool ResetGarminUSBDriver();
wxEvtHandler *m_pMainEventHandler;
NMEAHandler *m_pparent;
wxMutex *m_pShareMutex;
HANDLE m_usb_handle;
int m_max_tx_size;
int m_receive_state;
cpo_sat_data m_sat_data[12];
unit_info_type grmin_unit_info[2];
int m_nSats;
wxTimer TimerGarmin1;
int m_Thread_run_flag;
GARMIN_IO_Thread *m_io_thread;
bool m_bneed_int_reset;
int m_ndelay;
DECLARE_EVENT_TABLE()
};
#endif //__WXMSW__
//------------------------------------------------------------------------------
// NMEA Event Handler Implementation
//------------------------------------------------------------------------------
BEGIN_EVENT_TABLE(NMEAHandler, wxEvtHandler)
// EVT_SOCKET(SOCKET_ID, NMEAHandler::OnSocketEvent)
EVT_TIMER(TIMER_NMEA1, NMEAHandler::OnTimerNMEA)
END_EVENT_TABLE()
// constructor
NMEAHandler::NMEAHandler(int handler_id, wxFrame *frame, const wxString& NMEADataSource, const wxString& strBaudRate, wxMutex *pMutex, bool bGarmin)
{
m_handler_id = handler_id;
m_parent_frame = frame;
m_pParentEventHandler = m_parent_frame->GetEventHandler();
m_pShareMutex = pMutex;
m_pdevmon = NULL;
m_pSecondary_Thread = NULL;
m_gpsd_thread = NULL;
SetSecThreadInActive();
TimerNMEA.SetOwner(this, TIMER_NMEA1);
TimerNMEA.Stop();
m_data_source_string = NMEADataSource;
m_bGarmin_host = bGarmin;
m_pPortMutex = new wxMutex;
m_brequest_thread_pause = false;
m_gpsd_major = 0;
m_gpsd_minor = 0;
m_bgot_version = false;
ThreadPositionData.FixTime = 0;
ThreadPositionData.kLat = 0.;
ThreadPositionData.kLon = 0.;
ThreadPositionData.kCog = 0.;
ThreadPositionData.kSog = 0.;
ThreadPositionData.kHdm = NAN;
ThreadPositionData.kHdt = NAN;
ThreadPositionData.nSats = 0;
#ifndef OCPN_NO_SOCKETS
m_sock = NULL;
#endif
// Create and manage NMEA data stream source
// Decide upon NMEA source
wxString msg(_T("NMEA Data Source is...."));
msg.Append(m_data_source_string);
wxLogMessage(msg);
// NMEA Data Source is shared with AIS port, AIS does the muxing
// and we don't have anything else to do......
g_bGPSAISMux = false;
if(m_data_source_string.Contains(_T("AIS")))
g_bGPSAISMux = true;
// NMEA Data Source is specified serial port
else if(m_data_source_string.Contains(_T("Serial")))
{
wxString comx;
comx = m_data_source_string.AfterFirst(':'); // strip "Serial:"
#ifdef __WXMSW__
wxString scomx = comx;
scomx.Prepend(_T("\\\\.\\")); // Required for access to Serial Ports greater than COM9
// As a quick check, verify that the specified port is available
HANDLE m_hSerialComm = CreateFile(scomx.fn_str(), // Port Name
GENERIC_READ,
0,
NULL,
OPEN_EXISTING,
0,
NULL);
if(m_hSerialComm == INVALID_HANDLE_VALUE)
{
wxString msg(comx);
msg.Prepend(_(" Could not open serial port '"));
msg.Append(_("'\nSuggestion: Try closing other applications."));
OCPNMessageDialog md(m_parent_frame, msg, _("OpenCPN Message"), wxICON_ERROR );
md.ShowModal();
return;
}
else
CloseHandle(m_hSerialComm);
// Kick off the NMEA RX thread
m_pSecondary_Thread = new OCP_NMEA_Thread(this, frame, pMutex, m_pPortMutex, comx, g_pCommMan, strBaudRate);
m_Thread_run_flag = 1;
m_pSecondary_Thread->Run();
#endif
#ifdef __POSIX__
// Kick off the NMEA RX thread
m_pSecondary_Thread = new OCP_NMEA_Thread(this, frame, pMutex, m_pPortMutex, comx, g_pCommMan, strBaudRate, true);
m_Thread_run_flag = 1;
m_pSecondary_Thread->Run();
#endif
}
#ifdef __WXMSW__
else if(m_data_source_string.Contains(_T("GARMIN")))
{
m_pdevmon = new DeviceMonitorWindow(this, frame, pMutex);
}
#endif
#ifdef BUILD_WITH_LIBGPS
#ifdef VERSION_SET
#if VERSION_SET != 0x10000000
#warning : VERSION_SET skew detected...Using gps.h from libgps19
#define LIBGPS19_INCLUDES 1
#endif
#endif
else if(m_data_source_string.Contains(_T("LIBGPS")))
{
wxString NMEA_data_ip;
NMEA_data_ip = m_data_source_string.Mid(7); // extract the IP
int libgps_api = 0;
struct gps_data_t *pgps_data = &gpsd_data;
unsigned int d_VERSION_SET = VERSION_SET;
// printf(" VersionSet: %0X\n", d_VERSION_SET);
#define DYNAMIC_LOAD_LIBGPS 1
#ifdef DYNAMIC_LOAD_LIBGPS
wxString load1;
wxString load2;
wxString load3;
#ifndef __WXOSX__
load1 = _T("libgps.so");
load2 = _T("libgps.so.20");
load3 = _T("libgps.so.19");
#else
load1 = _T("/opt/local/lib/libgps.dylib");
load2 = _T("/opt/local/lib/libgps.20.dylib");
load3 = _T("/opt/local/lib/libgps.19.dylib");
#endif
m_lib_handle = dlopen(load1.fn_str(), RTLD_LAZY);
if(!m_lib_handle)
{
wxString msg = _T("Failed to load ");
msg += load1;
wxLogMessage(msg);
msg = _T("Attempting to load ");
msg += load2;
wxLogMessage(msg);
m_lib_handle = dlopen(load2.fn_str(), RTLD_LAZY);
}
if(!m_lib_handle)
{
wxString msg1 = _T("Failed to load ");
msg1 += load2;
wxLogMessage(msg1);
msg = _T("Attempting to load ");
msg += load3;
wxLogMessage(msg);
m_lib_handle = dlopen(load3.fn_str(), RTLD_LAZY);
}
if(!m_lib_handle)
{
wxString msg(_("Unable to load libgps"));
OCPNMessageDialog md(m_parent_frame, msg, _("OpenCPN Message"), wxICON_ERROR );
md.ShowModal();
return;
}
else
{
void *p = dlsym(m_lib_handle, "gps_open");
s_fn_gps_open19 = (gps_data_t *(*)(char *, char *))p;
s_fn_gps_open = (int(*)(char *, char *, struct gps_data_t *))p;
p = dlsym(m_lib_handle, "gps_close");
s_fn_gps_close = (int(*)(struct gps_data_t *))p;
p = dlsym(m_lib_handle, "gps_poll");
s_fn_gps_poll = (int(*)(struct gps_data_t *))p;
p = dlsym(m_lib_handle, "gps_waiting");
s_fn_gps_waiting = (bool(*)(struct gps_data_t *, unsigned int))p;
p = dlsym(m_lib_handle, "gps_stream");
s_fn_gps_stream = (int (*)(struct gps_data_t *, unsigned int, void *))p;
p = dlsym(m_lib_handle, "gps_read");
s_fn_gps_read = (int (*)(struct gps_data_t *))p;
// We can make a simple determination of libgps API level
if(s_fn_gps_poll)
{
wxLogMessage(_T("LIBGPS: Using libgps API=19"));
libgps_api = 19;
d_VERSION_SET = 0x800u;
}
else if(s_fn_gps_read)
{
wxLogMessage(_T("LIBGPS: Using libgps API=20"));
libgps_api = 20;
d_VERSION_SET = 1u<<28;
}
if((0 == libgps_api) ||
!s_fn_gps_open ||
!s_fn_gps_close ||
!s_fn_gps_waiting ||
!s_fn_gps_stream )
{
wxString msg(NMEA_data_ip);
msg.Prepend(_("Unable to initialize libgps.\n\ngpsd host is: "));
OCPNMessageDialog md(m_parent_frame, msg, _("OpenCPN Message"), wxICON_ERROR );
md.ShowModal();
return;
}
}
#else
//set up function pointers to required libgps functions
s_fn_gps_open = (gps_data_t *(*)(char *, char *))gps_open;
s_fn_gps_close = (int(*)(struct gps_data_t *))gps_close;
s_fn_gps_poll = (int(*)(struct gps_data_t *))gps_poll;
s_fn_gps_waiting = (bool(*)(struct gps_data_t *))gps_waiting;
s_fn_gps_stream = (int (*)(struct gps_data_t *, unsigned int, void *))gps_stream;
s_fun_gps_read = (int (*)(struct gps_data_t *)gps_read;
#endif
// Try to open the library
int result_open;
if(19 == libgps_api)
{
struct gps_data_t *gps_19data = NULL;
gps_19data = s_fn_gps_open19(NMEA_data_ip.char_str(), (char *)DEFAULT_GPSD_PORT);
if(!gps_19data)
{
wxString msg(NMEA_data_ip);
msg.Prepend(_("Call to gps_open failed.\nIs gpsd running?\n\ngpsd host is: "));
msg.Append(_("\n\nContinuing libgps setup..."));
OCPNMessageDialog md(m_parent_frame, msg, _("OpenCPN Message"), wxICON_INFORMATION | wxOK );
md.ShowModal();
result_open = 1; // fail
}
else
{
result_open = 0;
pgps_data = gps_19data;
}
}
else if(20 == libgps_api)
{
result_open = s_fn_gps_open(NMEA_data_ip.char_str(), (char *)DEFAULT_GPSD_PORT, pgps_data);
if (result_open != 0)
{
wxString msg(NMEA_data_ip);
msg.Prepend(_("Call to gps_open failed.\nIs gpsd running?\n\ngpsd host is: "));
msg.Append(_("\n\nContinuing libgps setup..."));
OCPNMessageDialog md(m_parent_frame, msg, _("OpenCPN Message"), wxICON_INFORMATION | wxOK );
md.ShowModal();
}
else {
}
}
else
result_open = 1; // not opened
if(!result_open) { // opened OK
// API version 19 structure layout differs from API V20.
// If we build with the API20 include file
// we need to hack an adjusted pointer to the version struct.
struct version_t *pversion = &(pgps_data->version);
#ifndef LIBGPS19_INCLUDES
if(19 == libgps_api) {
char *t19 = (char *)pgps_data;
t19 += 1032; // this magic number found empirically....
struct gps_data_t *p19_adjust = (struct gps_data_t *)t19;
pversion = (version_t *)p19_adjust;
}
#endif
int n_check_version = 5; // check up to five times
bool b_version_set = false;
struct version_t check_version;
check_version.proto_major =0; check_version.proto_minor = 0;
while(n_check_version) {
// Check library version
if(s_fn_gps_waiting(pgps_data, 1000)) {
if(20 == libgps_api)
s_fn_gps_read(pgps_data);
else if(19 == libgps_api)
s_fn_gps_poll(pgps_data);
}
if(pgps_data->set & d_VERSION_SET) {
b_version_set = true;
// 2.95 (libgps.so.19) gives 3.3
// 2.96 (libgps.so.20) gives 3.4
check_version = *pversion;
break;
}
n_check_version--;
}
if( b_version_set ){
wxString msg;
msg.Printf(_T("LIBGPS: Found libgps version %d.%d"), check_version.proto_major, check_version.proto_minor);
wxLogMessage(msg);
}
else
wxLogMessage(_T("LIBGPS: Version not determined"));
s_fn_gps_close(pgps_data);
pgps_data = NULL;
}
else { // Open did not work, but carry on anyway
wxString msg;
msg.Printf(_T("LIBGPS: Initial Open()failed, assuming libgps version at least 3.0"));
wxLogMessage(msg);
}
// Start the GPSD receiver thread
m_gpsd_thread = new OCP_GPSD_Thread(this, frame, NMEA_data_ip, libgps_api );
m_Thread_run_flag = 1;
m_gpsd_thread->Run();
}
#endif
#ifndef OCPN_NO_SOCKETS
// NMEA Data Source is private TCP/IP Server
if(m_data_source_string.Contains(_T("GPSD")))
{
wxString NMEA_data_ip;
NMEA_data_ip = m_data_source_string.Mid(5); // extract the IP
// Create the socket
m_sock = new wxSocketClient();
// Setup the event handler and subscribe to most events
m_sock->SetEventHandler(*this, SOCKET_ID);
m_sock->SetNotify(wxSOCKET_CONNECTION_FLAG |
wxSOCKET_INPUT_FLAG |
wxSOCKET_LOST_FLAG);
m_sock->Notify(TRUE);
m_sock->SetTimeout(1); // Short timeout
m_busy = FALSE;
// Build the target address
// n.b. Win98
// wxIPV4address::Hostname() uses sockets function gethostbyname() for address resolution
// Implications...Either name target must exist in c:\windows\hosts, or
// a DNS server must be active on the network.
// If neither true, then wxIPV4address::Hostname() will block (forever?)....
//
// Workaround....
// Use a thread to try the name lookup, in case it hangs
DNSTestThread *ptest_thread = NULL;
ptest_thread = new DNSTestThread(NMEA_data_ip);
ptest_thread->Run(); // Run the thread from ::Entry()
// Sleep and loop for N seconds
#define SLEEP_TEST_SEC 2
for(int is=0 ; is<SLEEP_TEST_SEC * 10 ; is++)
{
wxMilliSleep(100);
if(s_dns_test_flag)
break;
}
if(!s_dns_test_flag)
{
wxString msg(NMEA_data_ip);
msg.Prepend(_T("Could not resolve TCP/IP host '"));
msg.Append(_T("'\n Suggestion: Try 'xxx.xxx.xxx.xxx' notation"));
OCPNMessageDialog md(m_parent_frame, msg, _T("OpenCPN Message"), wxICON_ERROR );
md.ShowModal();
m_sock->Notify(FALSE);
m_sock->Destroy();
m_sock = NULL;
return;
}
// Resolved the name, somehow, so Connect() the socket
m_addr.Hostname(NMEA_data_ip);
m_addr.Service(GPSD_PORT_NUMBER);
m_sock->Connect(m_addr, FALSE); // Non-blocking connect
TimerNMEA.Start(TIMER_NMEA_MSEC,wxTIMER_CONTINUOUS);
}
#endif
}
NMEAHandler::~NMEAHandler()
{
}
void NMEAHandler::Close()
{
#ifndef OCPN_NO_SOCKETS
// Kill off the NMEA Socket if alive
if(m_sock)
{
m_sock->Notify(FALSE);
m_sock->Destroy();
TimerNMEA.Stop();
}
#endif
// Kill off the Secondary RX Thread if alive
if(m_pSecondary_Thread)
{
if(m_bsec_thread_active) // Try to be sure thread object is still alive
{
wxLogMessage(_T("Stopping Secondary Thread"));
m_Thread_run_flag = 0;
int tsec = 5;
while((m_Thread_run_flag >= 0) && (tsec--))
{
wxSleep(1);
}
wxString msg;
if(m_Thread_run_flag < 0)
msg.Printf(_T("Stopped in %d sec."), 5 - tsec);
else
msg.Printf(_T("Not Stopped after 5 sec."));
wxLogMessage(msg);
}
m_pSecondary_Thread = NULL;
m_bsec_thread_active = false;
}
// Kill off the GPSD Thread if alive
if(m_gpsd_thread)
{
if(m_bsec_thread_active) // Try to be sure thread object is still alive
{
wxLogMessage(_T("Stopping GPSD Rx Thread"));
m_Thread_run_flag = 0;
int tsec = 5;
while((m_Thread_run_flag >= 0) && (tsec--))
{
wxSleep(1);
}
wxString msg;
if(m_Thread_run_flag < 0)
msg.Printf(_T("Stopped in %d sec."), 5 - tsec);
else
msg.Printf(_T("Not Stopped after 5 sec."));
wxLogMessage(msg);
}
m_gpsd_thread = NULL;
m_bsec_thread_active = false;
}
#ifdef __WXMSW__
// Garmin
if(m_pdevmon)
{
m_pdevmon->Close();
m_pdevmon->Destroy();
m_pdevmon = NULL;
}
#endif
delete m_pPortMutex;
m_pPortMutex = NULL;
}
void NMEAHandler::GetSource(wxString& source)
{
source = m_data_source_string;
}
void NMEAHandler::Pause(void)
{
TimerNMEA.Stop();
#ifndef OCPN_NO_SOCKETS
if(m_sock)
m_sock->Notify(FALSE);
#endif
}
void NMEAHandler::UnPause(void)
{
TimerNMEA.Start(TIMER_NMEA_MSEC,wxTIMER_CONTINUOUS);
#ifndef OCPN_NO_SOCKETS
if(m_sock)
m_sock->Notify(TRUE);
#endif
}
void NMEAHandler::OnSocketEvent(wxSocketEvent& event)
{
#ifndef OCPN_NO_SOCKETS
#define RD_BUF_SIZE 200
unsigned char *bp;
unsigned char buf[RD_BUF_SIZE + 1];
int char_count;
wxString token;
double dglat, dglon, dgcog, dgsog;
double dtime;
wxDateTime fix_time;
wxString str_buf;
switch(event.GetSocketEvent())
{
case wxSOCKET_INPUT : // from gpsd Daemon
m_sock->SetFlags(wxSOCKET_WAITALL | wxSOCKET_BLOCK); // was (wxSOCKET_NOWAIT);
// We use wxSOCKET_BLOCK to avoid Yield() reentrancy problems
// if a long ProgressDialog is active, as in S57 SENC creation.
// Disable input event notifications to preclude re-entrancy on non-blocking socket
// m_sock->SetNotify(wxSOCKET_LOST_FLAG);
// Read the reply, one character at a time, looking for 0x0a (lf)
// If the reply contains no lf, break on the buffer full
bp = buf;
char_count = 0;
while (char_count < RD_BUF_SIZE)
{
m_sock->Read(bp, 1);
if(m_sock->Error())
break; // non-specific error, maybe timeout...
if(*bp == 0x0a) // end of sentence
break;
bp++;
char_count++;
}
*bp = 0; // end string
// Validate the string
str_buf = (wxString((const char *)buf, wxConvUTF8));
if(str_buf.StartsWith(_T("GPSD,O"))) // valid position data?
{
if(str_buf.GetChar(7) != '?') // GPSd connected and we get real data
{
wxStringTokenizer tkz(str_buf, _T(" "));
token = tkz.GetNextToken();
token = tkz.GetNextToken();
if(token.ToDouble(&dtime))
ThreadPositionData.FixTime = (time_t)floor(dtime);
token = tkz.GetNextToken(); // skip to lat
token = tkz.GetNextToken();
if(token.ToDouble(&dglat))
ThreadPositionData.kLat = dglat;
token = tkz.GetNextToken();
if(token.ToDouble(&dglon))
ThreadPositionData.kLon = dglon;
token = tkz.GetNextToken(); // skip to tmg
token = tkz.GetNextToken();
token = tkz.GetNextToken();
token = tkz.GetNextToken();
if(token.ToDouble(&dgcog))
ThreadPositionData.kCog = dgcog;
token = tkz.GetNextToken();
if(token.ToDouble(&dgsog))
{
ThreadPositionData.kSog = dgsog; // default is knots
if(m_bgot_version)
{
if((m_gpsd_major >= 2) && (m_gpsd_minor > 23)) // Speed data will be in meters/sec.
ThreadPositionData.kSog = dgsog * 3600. / 1852.; // convert from m/s to knots
}
}
// gpsd does not produce Hdt/Hdm
ThreadPositionData.kHdm = NAN;
ThreadPositionData.kHdt = NAN;
// Signal the main program
wxCommandEvent event( EVT_NMEA, m_handler_id );
event.SetEventObject( (wxObject *)this );
event.SetExtraLong(EVT_NMEA_DIRECT);
event.SetClientData(&ThreadPositionData);
m_pParentEventHandler->AddPendingEvent(event);
}
}
else if(str_buf.StartsWith(_T("GPSD,L"))) // version report?
{
// Need to see if there are 3 or 4 fields
wxStringTokenizer tkz(str_buf, _T(" "));
wxString token1 = tkz.GetNextToken();
wxString token2 = tkz.GetNextToken();
wxString token3 = tkz.GetNextToken();
wxString token4 = tkz.GetNextToken();
double gpsd_ver;
wxString ver_token;
if(token4.Len() == 0) // 3 fields
ver_token = token2;
else
ver_token = token3;