ComClass(串口类winAPI)

//============================================================================== //com class //Edited by yangyong, 2011/08/31 //Header: com.h //============================================================================== #include "com.h" //============================================================================== Com::Com(): itsPortHandle(INVALID_HANDLE_VALUE), itsCharsAvailable(0), itsPortNumber(cpCOM_1), itsBaudRate(brB_9600), itsByteSize(8), itsParity(ptNoParity), itsStopBits(sbOne) { } //============================================================================== Com::Com(ComPort portNumber): itsPortHandle(INVALID_HANDLE_VALUE), itsCharsAvailable(0), itsPortNumber(portNumber), itsBaudRate(brB_9600), itsByteSize(8), itsParity(ptNoParity), itsStopBits(sbOne) { } //============================================================================== Com::Com(ComPort portNumber, BaudRate buadRate): itsPortHandle(INVALID_HANDLE_VALUE), itsCharsAvailable(0), itsPortNumber(portNumber), itsBaudRate(buadRate), itsByteSize(8), itsParity(ptNoParity), itsStopBits(sbOne) { } //============================================================================== Com::Com(ComPort portNumber, BaudRate buadRate, char byteSize): itsPortHandle(INVALID_HANDLE_VALUE), itsCharsAvailable(0), itsPortNumber(portNumber), itsBaudRate(buadRate), itsByteSize(byteSize), itsParity(ptNoParity), itsStopBits(sbOne) { } //============================================================================== Com::Com(ComPort portNumber, BaudRate buadRate, char byteSize, ParityType parity): itsPortHandle(INVALID_HANDLE_VALUE), itsCharsAvailable(0), itsPortNumber(portNumber), itsBaudRate(buadRate), itsByteSize(byteSize), itsParity(parity), itsStopBits(sbOne) { } //============================================================================== Com::Com(ComPort portNumber, BaudRate buadRate, char byteSize, ParityType parity, StopBits stopBits): itsPortHandle(INVALID_HANDLE_VALUE), itsCharsAvailable(0), itsPortNumber(portNumber), itsBaudRate(buadRate), itsByteSize(byteSize), itsParity(parity), itsStopBits(stopBits) { } //============================================================================== Com::~Com() { this->Close(); } //============================================================================== bool Com::IsOpen() { return (itsPortHandle != INVALID_HANDLE_VALUE); } //============================================================================== bool Com::Open() { std::string StrCom = "COM"; DCB dcbPort; if(IsOpen()) { Close(); } //将数字转变成字符，并通过append函数添加在字符串StrCom结尾 //组合成串口号 if((itsPortNumber >= 0) && (itsPortNumber <= 9)) { StrCom.append(1,(char)(itsPortNumber + '0')); itsPortHandle = CreateFile(StrCom.c_str(), GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, long (0)); } if(IsOpen()) { if(GetCommState(itsPortHandle,&dcbPort)) { dcbPort.BaudRate = itsBaudRate; dcbPort.ByteSize = itsByteSize; dcbPort.Parity = itsParity; dcbPort.StopBits = itsStopBits; SetCommState(itsPortHandle,&dcbPort); } } return (IsOpen()); } //============================================================================== bool Com::Write(const char* WriteDataPtr,const char WriteLen) { unsigned long dwCharsWritten; bool Result; Result = false; if(IsOpen()) { dwCharsWritten = 0; WriteFile(itsPortHandle,WriteDataPtr,WriteLen,&dwCharsWritten,NULL); if(dwCharsWritten == (unsigned long)WriteLen) { Result = true; } } return Result; } //============================================================================== unsigned long Com::Read(char *ReadDataPtr) { unsigned long ReadLen; if(IsOpen()) { if(itsCharsAvailable > 0) { ReadFile(itsPortHandle,ReadDataPtr,itsCharsAvailable,&ReadLen,NULL); } } return ReadLen; } //============================================================================== void Com::Flush() { if(IsOpen()) PurgeComm(itsPortHandle,PURGE_TXABORT|PURGE_RXABORT| PURGE_TXCLEAR|PURGE_RXCLEAR); } //============================================================================== void Com::Close() { if(IsOpen()) { CloseHandle(itsPortHandle); itsPortHandle = INVALID_HANDLE_VALUE; } } //============================================================================== void Com::SetPortNumber(const ComPort PortNumberToSet) { if(itsPortNumber != PortNumberToSet) { itsPortNumber = PortNumberToSet; if(IsOpen()) { Close(); Open(); } } } //============================================================================== void Com::SetBaudRate(const BaudRate BaudRateToSet) { if(itsBaudRate != BaudRateToSet) { itsBaudRate = BaudRateToSet; if(IsOpen()) { Close(); Open(); } } } //============================================================================== void Com::SetStopBits(const StopBits StopBitsToSet) { if(itsStopBits != StopBitsToSet) { itsStopBits = StopBitsToSet; if(IsOpen()) { Close(); Open(); } } } //============================================================================== void Com::SetParity(const ParityType ParityToSet) { if(itsParity != ParityToSet) { itsParity = ParityToSet; if(IsOpen()) { Close(); Open(); } } } //============================================================================== ComPort Com::GetPortNumber() { return itsPortNumber; } //============================================================================== BaudRate Com::GetBaudRate() { return itsBaudRate; } //============================================================================== StopBits Com::GetStopBits() { return itsStopBits; } //============================================================================== ParityType Com::GetParity() { return itsParity; } //============================================================================== long Com::IsRxData() { COMSTAT statPort; unsigned long dwErrorCode; itsCharsAvailable = 0; if(IsOpen()) { ClearCommError(itsPortHandle,&dwErrorCode,&statPort); itsCharsAvailable = statPort.cbInQue; } return itsCharsAvailable; } //==============================================================================