串口操作类

EV_CTS | EV_DSR ); //表示串口收到字符 if (evtMask & EV_RXCHAR) { ClearCommError(ceSeries>m_hComm,&dwReadErrors,&cmState); willReadLen = cmState.cbInQue ; if (willReadLen <= 0) { continue; } //分配内存 readBuf = new BYTE[willReadLen]; ZeroMemory(readBuf,willReadLen); //读取串口数据 ReadFile(ceSeries->m_hComm, readBuf, willReadLen, &actualReadLen,0); //如果读取的数据大于， if (actualReadLen>0) { //触发读取回调函数 if (ceSeries->m_OnSeriesRead) { ceSeries->m_OnSeriesRead(ceSeries>m_pOwner,readBuf,actualReadLen); } } //释放内存 delete[] readBuf; readBuf = NULL; }
} //如果收到读线程退出信号，则退出线程 if (WaitForSingleObject(ceSeries->m_hReadCloseEvent,500) == WAIT_OBJECT_0) { break; } } return 0; } //关闭读线程 void CCESeries::CloseReadThread() { SetEvent(m_hReadCloseEvent); //设置所有事件无效无效 SetCommMask(m_hComm, 0); //清空所有将要读的数据 PurgeComm( m_hComm, PURGE_RXCLEAR ); //等待秒，如果读线程没有退出，则强制退出 if (WaitForSingleObject(m_hReadThread,4000) == WAIT_TIMEOUT) { TerminateThread(m_hReadThread,0); } m_hReadThread = NULL; } /* *函数介绍：打开串口 *入口参数：pPortOwner portNo :串口号 baud :波特率 parity :奇偶校验
CommTimeOuts.ReadTotalTimeoutConstant = 0; CommTimeOuts.WriteTotalTimeoutMultiplier = 10; CommTimeOuts.WriteTotalTimeoutConstant = 1000; if(!SetCommTimeouts( m_hComm, &CommTimeOuts )) { TRACE( _T("SetCommTimeouts 返回错误") ); //关闭串口 CloseHandle (m_hComm); m_hComm = INVALID_HANDLE_VALUE; return FALSE; } //指定端口监测的事件集 SetCommMask (m_hComm, EV_RXCHAR); //分配串口设备缓冲区 SetupComm(m_hComm,512,512); //初始化缓冲区中的信息 PurgeComm(m_hComm,PURGE_TXCLEAR|PURGE_RXCLEAR); CString strEvent; strEvent.Format(L"Com_ReadCloseEvent%d",portNo); m_hReadCloseEvent = CreateEvent(NULL,TRUE,FALSE,strEvent); //创建串口读数据监听线程 m_hReadThread = CreateThread(NULL,0,ReadThreadFunc,this,0,&m_dwReadThreadID); TRACE(_T("串口打开成功")); m_bOpened = TRUE; return TRUE; }
串口操作类
一：创建操作串口的串口类 //定义串口接收数据函数类型 typedef void (CALLBACK* ONSERIESREAD)(void * pOwner /*父对象指针*/ ,BYTE* buf /*接收到的缓冲区*/ 一：创建操作串口的串口类 //定义串口接收数据函数类型 typedef void (CALLBACK* ONSERIESREAD)(void * pOwner /*父对 象指针*/ ,BYTE* buf /*接收到的缓冲区*/ ,DWORD dwBufLen /*接收到的缓冲区长 度*/); class CCESeries { public: CCESeries(void); ~CCESeries(void); public: //打开串口 BOOL OpenPort(void* pOwner,/*指向父指针*/ UINT portNo = 1, /*串口号*/ UINT baud = 9600, /*波特率*/ UINT parity = NOPARITY, /*奇偶校验*/ UINT databits = 8, /*数据位*/ UINT stopbits = 0 /*停止位*/ ); //关闭串口 void ClosePort(); //同步写入数据 BOOL WriteSyncPort(const BYTE*buf , DWORD bufLen); //设置串口读取、写入超时 BOOL SetSeriesTimeouts(COMMTIMEOUTS CommTimeOuts); //得到串口是否打开
if (m_bOpened) { //关闭串口 ClosePort(); } } //串口读线程函数 DWORD CCESeries::ReadThreadFunc(LPVOID lparam) { CCESeries *ceSeries = (CCESeries*)lparam; DWORD evtMask; BYTE * readBuf = NULL;//读取的字节 DWORD actualReadLen=0;//实际读取的字节数 DWORD willReadLen; DWORD dwReadErrors; COMSTAT cmState; // 清空缓冲，并检查串口是否打开。 ASSERT(ceSeries->m_hComm !=INVALID_HANDLE_VALUE); //清空串口 PurgeComm(ceSeries->m_hComm, PURGE_RXCLEAR | PURGE_TXCLEAR ); SetCommMask (ceSeries->m_hComm, EV_RXCHAR | EV_CTS | EV_DSR ); while (TRUE) { if (WaitCommEvent(ceSeries->m_hComm,&evtMask,0)) { SetCommMask (ceSeries->m_hComm, EV_RXCHAR |
:使用此串口类的窗体句柄
databits :数据位 stopbits :停止位 *出口参数：(无) *返回值：TRUE:成功打开串口;FALSE:打开串口失败 */ BOOL CCESeries::OpenPort(void * pOwner, UINT portNo , /*串口号*/ UINT baud , /*波特率*/ UINT parity , /*奇偶校验*/ UINT databits , /*数据位*/ UINT stopbits /*停止位*/ ) { DCB commParam; TCHAR szPort[15]; ASSERT(pOwner!=NULL); m_pOwner = pOwner; // 已经打开的话，直接返回 if (m_hComm != INVALID_HANDLE_VALUE) { return TRUE; } //设置串口名 wsprintf(szPort, L"COM%d:", portNo); //打开串口 m_hComm = CreateFile( szPort, GENERIC_READ | GENERIC_WRITE, //允许读和写 0, //独占方式（共享模式） NULL, OPEN_EXISTING, //打开而不是创建（创建方
式） 0, NULL ); if (m_hComm == INVALID_HANDLE_VALUE) { // 无效句柄,返回。 TRACE(_T("CreateFile 返回无效句柄\n")); return FALSE; } // 得到打开串口的当前属性参数，修改后再重新设置串口。 if (!GetCommState(m_hComm,&commParam)) { //关闭串口 CloseHandle (m_hComm); m_hComm = INVALID_HANDLE_VALUE; return FALSE; } //设置串口参数 commParam.BaudRate = baud; commParam.fBinary = TRUE; 此处必须设置TRUE commParam.fParity = TRUE; commParam.ByteSize = databits; commParam.Parity = parity; commParam.StopBits = stopbits; commParam.fOutxCtsFlow = FALSE; flow control commParam.fOutxDsrFlow = FALSE;
// 设置波特率 // 设置二进制模式， // 支持奇偶校验 // 数据位,范围:4-8 // 校验模式 // 停止位 // No CTS output // No DSR
output flow control commParam.fDtrControl = DTR_CONTROL_ENABLE; // DTR flow control type commParam.fDsrSensitivity = FALSE; // DSR sensitivity commParam.fTXContinueOnXoff = TRUE; // XOFF continues Tx commParam.fOutX = FALSE; // No XON/XOFF out flow control commParam.fInX = FALSE; // No XON/XOFF in flow control commParam.fErrorChar = FALSE; // Disable error replacement commParam.fNull = FALSE; // Disable null stripping commParam.fRtsControl = RTS_CONTROL_ENABLE; // RTS flow control commParam.fAbortOnError = FALSE; // 当串口发生错 误，并不终止串口读写 //设置串口参数 if (!SetCommState(m_hComm, &commParam)) { TRACE(_T("SetCommState error")); //关闭串口 CloseHandle (m_hComm); m_hComm = INVALID_HANDLE_VALUE; return FALSE; } //设置串口读写时间 COMMTIMEOUTS CommTimeOuts; GetCommTimeouts (m_hComm, &CommTimeOuts); CommTimeOuts.ReadIntervalTimeout = MAXDWORD; CommTimeOuts.ReadTotalTimeoutMultiplier = 0;
BOOL GetComOpened(); private: //串口读线程函数 static DWORD WINAPI ReadThreadFunc(LPVOID lparam); private: //关闭读线程 void CloseReadThread(); private: //已打开的串口句柄 HANDLE m_hComm; //读线程句柄 HANDLE m_hReadThread; //读线程ID标识 DWORD m_dwReadThreadID; //读线程退出事件 HANDLE m_hReadCloseEvent; BOOL m_bOpened; //串口是否打开 void * m_pOwner; //指定父对象指针 public: ONSERIESREAD m_OnSeriesRead; //串口读取回调函数 }; //构造函数 CCESeries::CCESeries() { //初始化内部变量 m_hComm = INVALID_HANDLE_VALUE; m_OnSLeabharlann BaiduriesRead = NULL; m_bOpened = 0; } //析构函数 CCESeries::~CCESeries() {