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|
__fastcall TCommunication::TCommunication(bool CreateSuspended,HDC handle)
: TThread(CreateSuspended)
{
FSection=new TCriticalSection();
memset(FBuffer,0,MAXCAR);
FHandlePort=INVALID_HANDLE_VALUE;
memset(&FTimeout,0,sizeof(COMMTIMEOUTS));
memset(&FInfoio,0,sizeof(OVERLAPPED));
memset(&FConfigport,0,sizeof(DCB));
TIniFile *ini=new TIniFile(ChangeFileExt(Application->ExeName,".cfg"));
FPort=ini->ReadString("COMMUNICATION","Port","COM1");
FParite=ini->ReadString("COMMUNICATION","Parité","Aucune");
FVitesse=ini->ReadString("COMMUNICATION","Vitesse","38400");
FNbBitDonnees=ini->ReadString("COMMUNICATION","Données","8");
FNbBitStop=ini->ReadString("COMMUNICATION","Stop","1");
delete ini;
InitCommunication();
}
//---------------------------------------------------------------------------
void __fastcall TCommunication::Execute()
{
while (!Terminated)
{
LireTrame();
}
}
//---------------------------------------------------------------------------
void __fastcall TCommunication::OnTerminate()
{
NettoyerBuffer();
CloseHandle(FHandlePort);
}
//---------------------------------------------------------------------------
void TCommunication::LireTrame(void)
{
char tampon[MAXTRAME];
memset(tampon,0,MAXTRAME);
unsigned long nboctetlu=0;
DWORD tempsmaxi;
ResetEvent(FInfoio.hEvent);
if (!ReadFile(FHandlePort,tampon,MAXTRAME,&nboctetlu,&FInfoio))
{
if ((GetLastError())==ERROR_IO_PENDING)
{
tempsmaxi=GetTickCount()+TEMPSMAXI;
while(!GetOverlappedResult(FHandlePort,&FInfoio,&nboctetlu,true))
if (GetTickCount()>tempsmaxi)
break;
}
}
if (nboctetlu!=0)
AjouteTrame(tampon,nboctetlu);
}
//---------------------------------------------------------------------------
void TCommunication::NettoyerBuffer(void)
{
PurgeComm(FHandlePort,PURGE_RXCLEAR);
PurgeComm(FHandlePort,PURGE_TXCLEAR);
}
//---------------------------------------------------------------------------
void TCommunication::AjouteTrame(char *trame,int nboctet)
{
char mess[MAXCAR];
if (FNbCar+nboctet<MAXCAR)
{
memmove(&FBuffer[FNbCar],trame,nboctet);
FNbCar+=nboctet;
int fin;
while(1)
{
if (FNbCar)
{
fin=0;
for (int i=1;i<FNbCar-1;i++)
{
if (FBuffer[i]==0x0D && FBuffer[i+1]==0x0A)
{
fin=i+1;
break;
}
}
if (fin)
{
fin++;
memmove(mess,FBuffer,fin); mess[fin]=0;
Traite(mess);
memmove(FBuffer,&FBuffer[fin],MAXCAR-fin);
FNbCar-=fin;
memset(&FBuffer[FNbCar],0,MAXCAR-FNbCar);
}
else
break;
}
else
break;
}
}
else
{
memset(FBuffer,0,MAXCAR);
FNbCar=0;
}
}
//---------------------------------------------------------------------------
void TCommunication::Traite(AnsiString trame)
{
//
}
//---------------------------------------------------------------------------
void TCommunication::InitCommunication(void)
{
CreerHandle();
InitParametres();
InitTimeOut();
InitInfoIO();
NettoyerBuffer();
}
//---------------------------------------------------------------------------
void TCommunication::CreerHandle(void)
{
FHandlePort=CreateFile(FPort.c_str(),
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_FLAG_OVERLAPPED,
NULL);
if (FHandlePort==INVALID_HANDLE_VALUE)
ShowMessage("Le port est occupé");
else
SetupComm(FHandlePort,MAXTRAME,MAXTRAME);
}
//---------------------------------------------------------------------------
void TCommunication::InitParametres(void)
{
if (!GetCommState(FHandlePort,&FConfigport))
ShowMessage("Erreur sur la lecture de la configuration du port");
FConfigport.BaudRate=FVitesse.ToIntDef(0);
FConfigport.ByteSize=FNbBitDonnees.ToIntDef(0);
if (!FParite.AnsiCompare("Aucune")) FConfigport.Parity=NOPARITY;
if (!FParite.AnsiCompare("Paire")) FConfigport.Parity=EVENPARITY;
if (!FParite.AnsiCompare("Impaire")) FConfigport.Parity=ODDPARITY;
if (!FNbBitStop.AnsiCompare("1")) FConfigport.Parity=ONESTOPBIT;
if (!FNbBitStop.AnsiCompare("1.5")) FConfigport.Parity=ONE5STOPBITS;
if (!FNbBitStop.AnsiCompare("2")) FConfigport.Parity=TWOSTOPBITS;
FConfigport.fDtrControl=DTR_CONTROL_ENABLE;
FConfigport.fRtsControl=RTS_CONTROL_ENABLE;
if (!SetCommState(FHandlePort,&FConfigport))
ShowMessage("Erreur sur l'écriture de la configuration du port");
}
//---------------------------------------------------------------------------
void TCommunication::InitTimeOut(void)
{
FTimeout.ReadIntervalTimeout=10;
FTimeout.ReadTotalTimeoutMultiplier=1;
FTimeout.ReadTotalTimeoutConstant=100;
FTimeout.WriteTotalTimeoutMultiplier=1;
FTimeout.WriteTotalTimeoutConstant=100;
SetCommTimeouts(FHandlePort,&FTimeout);
}
//---------------------------------------------------------------------------
void TCommunication::InitInfoIO(void)
{
FInfoio.hEvent=CreateEvent(NULL,false,false,NULL);
}
//--------------------------------------------------------------------------- |
