qt串口类源代码.7z

// Comm.cpp: implementation of the CComm class. // ////////////////////////////////////////////////////////////////////// #include "stdafx.h" #include "Comm.h" #ifdef _DEBUG #undef THIS_FILE static char THIS_FILE[]=__FILE__; #define new DEBUG_NEW #endif ////////////////////////////////////////////////////////////////////// // Construction/Destruction ////////////////////////////////////////////////////////////////////// const int MAXBLOCK =2048; CComm::CComm() { m_hComm = INVALID_HANDLE_VALUE; } CComm::~CComm() { CloseComm();//关闭串口 } // BOOL CComm::OpenComm(int nComm) { CString strCommName =_T(""); CString strErrInfo =_T(""); strCommName.Format(_T("COM%d"), nComm); m_hComm =::CreateFile(strCommName, /*要打开串口名称*/ GENERIC_READ | GENERIC_WRITE, /*允许读和写*/ 0, /*独占方式*/ NULL, /*安全属性*/ OPEN_EXISTING, /*打开而不是创建*/ 0,//FILE_FLAG_OVERLAPPED | FILE_ATTRIBUTE_NORMAL, /*同步方式*/ NULL); /*模板句柄*/ if(m_hComm == INVALID_HANDLE_VALUE) { strErrInfo.Format(_T("打开%s失败!"),strCommName); AfxMessageBox(strErrInfo); return FALSE; } else { return TRUE; } } void CComm::CloseComm() { if(m_hComm != INVALID_HANDLE_VALUE) { ::CloseHandle(m_hComm); m_hComm = INVALID_HANDLE_VALUE; } } BOOL CComm::SetComm(int nBaudRate, int nParity, int nByteSize, int nStopBits) { if(!::SetupComm(m_hComm, MAXBLOCK, MAXBLOCK)) //设置输入缓冲区和输出缓冲区的大小 { return FALSE; } DCB stDCB; memset(&stDCB,0,sizeof(stDCB)); if(!::GetCommState(m_hComm,&stDCB)) //获取串口当前状态属性 { return FALSE; } stDCB.BaudRate = nBaudRate; //波特率 stDCB.fParity = TRUE; stDCB.fBinary =TRUE; stDCB.Parity = (unsigned char)nParity; //奇偶校验位(NOPARITY等) stDCB.ByteSize =(unsigned char)nByteSize; //每个字节有8位 stDCB.StopBits =(unsigned char)nStopBits; //停止位(ONESTOPBIT等) if(!::SetCommState(m_hComm, &stDCB)) //设置串口状态属性 { MessageBox(NULL,_T("串口已处于打开状态,请先关闭!"),_T("错误"),MB_OK | MB_ICONERROR); return FALSE; } ::PurgeComm(m_hComm,PURGE_TXCLEAR | PURGE_RXCLEAR); //清空输入输出缓冲区 return TRUE; } BOOL CComm::SetTimeOuts(COMMTIMEOUTS stTimeOuts) { ::SetCommTimeouts(m_hComm,&stTimeOuts); //设置超时 ::PurgeComm(m_hComm,PURGE_TXCLEAR | PURGE_RXCLEAR); //清空输入输出缓冲区 return TRUE; } BOOL CComm::ReadComm(char *lpBuff, int nLen) { if(::ReadFile(m_hComm,lpBuff,nLen,(DWORD *)&nLen,NULL) == FALSE) { return FALSE; } else { return TRUE; } } BOOL CComm::WriteComm(char *lpBuffer, int nLen) { if(::WriteFile(m_hComm, lpBuffer, nLen, (DWORD *)&nLen, NULL)==FALSE) { return FALSE; } else { return TRUE; } }