CE串口调试源码

1、1.       新建基于对话框的MFC程序框架，添加对应的控件，如输入输出编辑框，发送按钮，端口选择控件，定时发送等2.       在对话框类头文件中声明串口DCB及相应的函数接口：public:void OpenCom();void CloseCom();afx_msg void OnDestroy();  DCB dcb;/* 串口参数结构体*/HANDLE m_hComm;/* 串口操作句柄*/HANDLE m_ExitThreadEvent;/

2、* 串口接收线程退出事件*/CString m_strRECV;/* 接收区显示字符*/ afx_msg void OnBnClickedButtonSend();/发送按钮消息响应函数/ 打开串口BOOL OpenPort(LPCTSTR Port, int BaudRate, int DataBits, int StopBits, int Parity);/关闭串口BOOL ClosePort();/ 串口接收线程static DWORD CommRecvTread(LPVOID lparam); / 串口接收数据成功回调函数typedef void (CALLBACK

3、 *ONCOMMRECV)(CWnd* pWnd, char *buf, int buflen);static void CALLBACK OnCommRecv(CWnd* pWnd, char *buf, int buflen);CString m_strSend;BOOL mcheck;afx_msg void OnTimer(UINT_PTR nIDEvent);afx_msg void OnBnClickedCheck1();CComboBox m_ComboPort;afx_msg void OnCbnSelchangeCombo1();3.   

4、60;   在对话框初始化文件中添加m_ComboPort.SetCurSel(0);/* 默认端口为: COM1 */m_hComm = INVALID_HANDLE_VALUE;/* 串口操作句柄无效*/m_ExitThreadEvent = NULL;/* 串口接收线程退出事件无效*/m_strRECV = _T("");/* 接收显示字符为空*/OpenCom();4.       添加对应的功能函数BOOL CSerialTestDlg:OpenPort(LPCTSTR Port, i

5、nt BaudRate, int DataBits, int StopBits, int Parity)COMMTIMEOUTS CommTimeOuts; / 打开串口m_hComm = CreateFile(Port, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);if(m_hComm = INVALID_HANDLE_VALUE)MessageBox(_T("无法打开端口或端口已打开!请检查是否已被占用.");return FALSE; GetCommState(m_hComm,

6、&dcb);/* 读取串口的DCB */dcb.BaudRate = BaudRate;dcb.ByteSize = DataBits;dcb.Parity = Parity;dcb.StopBits = StopBits;dcb.fParity = FALSE;/* 禁止奇偶校验*/dcb.fBinary = TRUE;dcb.fDtrControl = 0;/* 禁止流量控制*/dcb.fRtsControl = 0;dcb.fOutX = 0;dcb.fInX = 0;dcb.fTXContinueOnXoff = 0; /设置状态参数SetCommMask(m_hCo

7、mm, EV_RXCHAR| EV_RXFLAG);/* 串口事件:接收到一个字符*/SetupComm(m_hComm, 16384, 16384);/* 设置接收与发送的缓冲区大小*/if(!SetCommState(m_hComm, &dcb)/* 设置串口的DCB */MessageBox(_T("无法按当前参数配置端口，请检查参数!");ClosePort();return FALSE; /设置超时参数GetCommTimeouts(m_hComm, &CommTimeOuts);CommTimeOuts.ReadIntervalTime

8、out = 100;/* 接收字符间最大时间间隔*/CommTimeOuts.ReadTotalTimeoutMultiplier = 1;CommTimeOuts.ReadTotalTimeoutConstant = 100;/* 读数据总超时常量*/CommTimeOuts.WriteTotalTimeoutMultiplier = 0;CommTimeOuts.WriteTotalTimeoutConstant = 0;if(!SetCommTimeouts(m_hComm, &CommTimeOuts)MessageBox(_T("无法设置超时参数!");C

9、losePort();return FALSE; PurgeComm(m_hComm, PURGE_TXCLEAR | PURGE_RXCLEAR);/* 清除收/发缓冲区*/return TRUE;  BOOL CSerialTestDlg:ClosePort(void)if(m_hComm != INVALID_HANDLE_VALUE)SetCommMask(m_hComm, 0);PurgeComm(m_hComm, PURGE_TXCLEAR | PURGE_RXCLEAR);/* 清除收/发缓冲*/CloseHandle(m_hComm);/* 关闭串

10、口操作句柄*/m_hComm = INVALID_HANDLE_VALUE;return TRUE; return FALSE;  void CALLBACK CSerialTestDlg:OnCommRecv(CWnd* pWnd, char *buf, int buflen)CString tmp; CSerialTestDlg * pDlg = (CSerialTestDlg*)pWnd;CEdit *pRecvStrEdit = (CEdit*)pDlg->GetDlgItem(IDC_EDIT_RECV);/* 取得控件指针*/for (

11、int i = 0; i < buflen; i+, buf+)tmp.Format(_T("%c"), *buf);/* 将字符转换为字符串*/pDlg->m_strRECV += tmp; pRecvStrEdit->SetWindowText(pDlg->m_strRECV);/* 显示在窗口上*/  DWORD CSerialTestDlg:CommRecvTread(LPVOID lparam)DWORD dwLength;char *recvBuf = new char1024;CSerialTestDlg

12、*pDlg = (CSerialTestDlg*)lparam; while(TRUE)/* 等待线程退出事件*/if (WaitForSingleObject(pDlg->m_ExitThreadEvent, 0) = WAIT_OBJECT_0)break; if (pDlg->m_hComm != INVALID_HANDLE_VALUE)/* 从串口读取数据*/BOOL fReadState = ReadFile(pDlg->m_hComm, recvBuf, 1024, &dwLength, NULL);if(!fReadState)/M

13、essageBox(_T("无法从串口读取数据!");elseif(dwLength != 0)OnCommRecv(pDlg, recvBuf, dwLength);/* 接收成功调用回调函数*/ delete recvBuf;return 0;  / 定义串口设置参数表格const CString PorTbl6 = _T("COM1:"),_T("COM2:"),_T("COM3:"),_T("COM4:"),_T("COM5:"), _T

14、("COM6:");const DWORD BaudTbl6 = 4800, 9600, 19200, 38400, 57600,115200;const DWORD DataBitTbl2 = 7, 8;const BYTE StopBitTbl3 = ONESTOPBIT, ONE5STOPBITS, TWOSTOPBITS;const BYTE ParityTbl4 = NOPARITY, ODDPARITY, EVENPARITY, MARKPARITY; void CSerialTestDlg:OpenCom()/ TODO: 在此添加控件通知处理程序代

15、码DWORD IDThread;HANDLE hRecvThread;/* 接收线程句柄*/UpdateData(TRUE); CString strPort = PorTblm_ComboPort.GetCurSel();/* 查表获取参数值*/DWORD baud= BaudTbl1;DWORD databit = DataBitTbl1;BYTE stopbit = StopBitTbl0;BYTE parity= ParityTbl0; BOOL ret = OpenPort(strPort, baud, databit, stopbit, parity);/* 打

16、开串口*/if (ret = FALSE)return; m_ExitThreadEvent = CreateEvent(NULL, TRUE, FALSE, NULL);/* 创建串口接收线程退出事件*/ / 创建串口接收线程hRecvThread = CreateThread(0, 0, CommRecvTread, this, 0, &IDThread);if (hRecvThread = NULL) MessageBox(_T("创建接收线程失败!");return;CloseHandle(hRecvThread);MessageBox(

17、_T("打开") + strPort + _T("成功!"); void CSerialTestDlg:CloseCom()/ TODO: 在此添加控件通知处理程序代码if (m_ExitThreadEvent != NULL)SetEvent(m_ExitThreadEvent);/* 通知线程退出*/Sleep(1000);CloseHandle(m_ExitThreadEvent);m_ExitThreadEvent = NULL;ClosePort(); void CSerialTestDlg:OnBnClickedButto

18、nSend()/ TODO: 在此添加控件通知处理程序代码DWORD dwactlen; if (m_hComm = INVALID_HANDLE_VALUE)MessageBox(_T("串口未打开!");return; UpdateData(TRUE);int len = m_strSend.GetLength();/* 取得输入字符串长度*/len+;char *psendbuf = new charlen; for(int i = 0; i < len;i+)psendbufi = (char)m_strSend.GetAt(i);/* 转换为单字节字符*/ WriteFile(m_hComm, psendbuf, len, &dwactlen, NULL);/* 从串口发送数据*/ delete psendbuf; void CSerialTestDlg:OnDestroy()