一款GPS软件的源代码

/* Module : GPS.CPP Purpose: "C" style Implementation to GPS32 Created: PJN / 28-12-1997 History: PJN / 20-01-1998 1. A number of problems were discovered when GPSLIB was being used in a UNICODE build. These problems have been fixed 2. Mak file now includes all the possible build options 3. Mak file no longer hard codes output to d:\winnt\system32 4. Included release binaries in distribution PJN / 26-08-1998 1. Small change to stdafx.h to include afxcview.h in gps32exe 2. The GpsShowControlPanel function now actually works 3. Minor tweaks to the GPS Mak files 4. Removed a number of unused symbols 5. Change ID of a number of GPS32EXE menu items to avoid conflict with new VC 6 defines. 6. Updated all Version Infos to 1.02 7. Removed a level 4 warning from the Test app. 8. Removed unused toolbar from GPS CPL file 9. GPS cpl file now uses standard F2 accelerator for Rename 10. GPS32EXE toolbar is now shown flat 11. Number of extra TRACE statements have been added to aid in debugging. PJN / 11-08-1999 1. Now uses the WINAPI calling convention meaning that GPSLIB is now callable from VB. 2. Now also ships a GPS.BAS file for use of GPSLIB in VB PJN / 27-09-2001 1. Fixed a problem where the background serial port thread using causing heavy CPU utilization. 2. Updated the project settings so that all binaries get build to the Bin directory and all Lib files get created in a Lib directory 3. Updated the version info's in all the binaries 4. Updated the copyright message in the code modules PJN / 21-08-2002 1. Fixed a synchronisation problem between the worker thread and the GpsGetPosition method. Thanks to Bill Oatman for spotting this problem. Copyright (c) 1997 - 2002 by PJ Naughter. (Web: www.naughter.com, Email: pjna@naughter.com) All rights reserved. Copyright / Usage Details: You are allowed to include the source code in any product (commercial, shareware, freeware or otherwise) when your product is released in binary form. You are allowed to modify the source code in any way you want except you cannot modify the copyright details at the top of each module. If you want to distribute source code with your application, then you are only allowed to distribute versions released by the author. This is to maintain a single distribution point for the source code. */ ///////////////////////////////// Includes ////////////////////////////////// #include "stdafx.h" #include "gps.h" #include "serport.h" #include "resource.h" #include "nmea.h" #include "math.h" #include "gpssetup.h" ////////////////////////////////// Macros / Defines ////////////////////////// #ifdef _DEBUG #undef THIS_FILE static char BASED_CODE THIS_FILE[] = __FILE__; #define new DEBUG_NEW #endif ////////////////////////////////// Locals ///////////////////////////////////// class GPSHandle { public: GPSHandle(); ~GPSHandle(); GPSPOSITION m_Position; //the actual data CEvent* m_pKillEvent; //Event to signal thread to exit CEvent* m_pStartEvent; //Is the background thread running GPSDEVINFO m_DevInfo; //Settings of the comms port to use BOOL m_bRunning; //Is the background thread running CWinThread* m_pThread; //The pointer to the background thread CCriticalSection m_csPosition; //Critical section used to serialized access to m_Position }; BOOL GetGpsDevice(DWORD dwDevice, LPGPSDEVINFO lpGpsDevInfo); BOOL SetGpsDevice(DWORD dwDevice, LPCGPSDEVINFO lpGpsDevInfo, BOOL bCheckDefault = TRUE); BOOL SetGpsNumDevices(DWORD dwDevices); UINT GpsMonitorThead(LPVOID pParam); ////////////////////////////////// Implementation ///////////////////////////// GPSHandle::GPSHandle() { ZeroMemory(&m_Position, sizeof(GPSPOSITION)); m_pKillEvent = new CEvent(FALSE, TRUE); m_pStartEvent = new CEvent(FALSE, TRUE); m_pThread = NULL; } GPSHandle::~GPSHandle() { delete m_pStartEvent; m_pStartEvent = NULL; delete m_pKillEvent; m_pKillEvent = NULL; } BOOL GetGpsDevice(DWORD dwDevice, LPGPSDEVINFO lpGpsDevInfo) { BOOL bSuccess = FALSE; HKEY hKey; CString sValueKey; sValueKey.Format(_T("SOFTWARE\\PJ Naughter\\GPS32\\%d"), dwDevice); LONG nError = RegOpenKeyEx(HKEY_LOCAL_MACHINE, sValueKey, 0, KEY_ALL_ACCESS, &hKey); if (nError == ERROR_SUCCESS) { DWORD dwType; DWORD dwSize; RegQueryValueEx(hKey, _T("DeviceName"), 0, &dwType, NULL, &dwSize); TCHAR* pszName = new TCHAR[dwSize / sizeof(TCHAR)]; RegQueryValueEx(hKey, _T("DeviceName"), 0, &dwType, (LPBYTE) pszName, &dwSize); _tcscpy(lpGpsDevInfo->szDeviceName, pszName); delete [] pszName; RegQueryValueEx(hKey, _T("DefaultReceiver"), 0, &dwType, (LPBYTE) &lpGpsDevInfo->bDefaultReceiver, &dwSize); RegQueryValueEx(hKey, _T("Port"), 0, &dwType, (LPBYTE) &lpGpsDevInfo->wCommPort, &dwSize); RegQueryValueEx(hKey, _T("BaudRate"), 0, &dwType, (LPBYTE) &lpGpsDevInfo->dwCommBaudRate, &dwSize); RegQueryValueEx(hKey, _T("DataBits"), 0, &dwType, (LPBYTE) &lpGpsDevInfo->wCommDataBits, &dwSize); RegQueryValueEx(hKey, _T("StopBits"), 0, &dwType, (LPBYTE) &lpGpsDevInfo->wCommStopBits, &dwSize); bSuccess = TRUE; RegCloseKey(hKey); } else { TRACE(_T("GetGpsDevice, Failed to open a registry key, Error was: %d\n"), nError); } return bSuccess; } BOOL GpsSetNumDevices(DWORD dwDevices) { BOOL bSuccess = FALSE; HKEY hKey; DWORD dwDisposition; LONG nError = RegCreateKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\PJ Naughter\\GPS32"), 0, _T(""), REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &hKey, &dwDisposition); if (nError == ERROR_SUCCESS) { RegSetValueEx(hKey, _T("NumberOfDevices"), 0, REG_DWORD, (CONST BYTE*) &dwDevices, sizeof(DWORD)); RegCloseKey(hKey); bSuccess = TRUE; } else { TRACE(_T("GpsSetNumDevices, Failed in call to create a registry key, Error was: %d\n"), nError); } return bSuccess; } BOOL SetGpsDevice(DWORD dwDevice, LPCGPSDEVINFO lpDevice, BOOL bCheckDefault) { //Fix up the case where we have just made this device //the default by removing the default flag from all //other devices if (bCheckDefault && lpDevice->bDefaultReceiver) { //make all other devices non default for (DWORD i=0; i<GpsGetNumDevices(); i++) { GPSDEVINFO devInfo; GetGpsDevice(i, &devInfo); devInfo.bDefaultReceiver = FALSE; SetGpsDevice(i, &devInfo, FALSE); } } BOOL bSuccess = FALSE; HKEY hKey; DWORD dwDisposition; CString sValueKey; sValueKey.Format(_T("SOFTWARE\\PJ Naughter\\GPS32\\%d"), dwDevice); LONG nError = RegCreateKeyEx(HKEY_LOCAL_MACHINE, sValueKey, 0, _T(""), REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &hKey, &dwDisposition); if (nError == ERROR_SUCCESS) { RegSetValueEx(hKey, _T("DeviceName"), 0, REG_SZ, (CONST BYTE*) lpDevice->szDeviceName, _tcslen(lpDevice->szDeviceName)); RegSetValueEx(hKey, _T("DefaultReceiver"), 0, REG_DWORD, (CONST BYTE*) &lpDevice->bDefaultReceiver, sizeof(BOOL)); DWORD dwData = lpDevice->wCommPort; RegSetValueEx(hKey, _T("Port"), 0, REG_DWORD, (CONST BYTE*) &dwData, sizeof(DWORD));