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1、精选优质文档-倾情为你奉上该程序全部由C写成 没有C+ 更没用MFC完全是自娱自乐 给需要的人一个参考#include stdafx.h#include #include resource.h#include MainDlg.h#include #include #include HANDLE hComm;/用于获取串口打开函数的返回值（句柄或错误值）OVERLAPPED m_ov;COMSTAT comstat;DWORD m_dwCommEvents;TCHAR cRecs200,cSends100; /接收字符串 发送字符串 char j=0,*cCom; /接收用统计数据大小变量 端口
2、选择BOOL WINAPI Main_Proc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)switch(uMsg)HANDLE_MSG(hWnd, WM_INITDIALOG, Main_OnInitDialog);HANDLE_MSG(hWnd, WM_COMMAND, Main_OnCommand);HANDLE_MSG(hWnd,WM_CLOSE, Main_OnClose);return FALSE;/*系统初始化函数*/BOOL Main_OnInitDialog(HWND hwnd, HWND hwndFocus, LPA
3、RAM lParam) HWND hwndCombo1=GetDlgItem(hwnd,IDC_COMBO1);ComboBox_InsertString(hwndCombo1,-1,TEXT(COM1);ComboBox_InsertString(hwndCombo1,-1,TEXT(COM2);ComboBox_InsertString(hwndCombo1,-1,TEXT(COM3);ComboBox_InsertString(hwndCombo1,-1,TEXT(COM4);ComboBox_InsertString(hwndCombo1,-1,TEXT(COM5);ComboBox_
4、SetCurSel(hwndCombo1,0);void CALLBACK TimerProc (HWND hwnd, UINT message, UINT iTimerID, DWORD dwTime);SetTimer(hwnd,1,1000,TimerProc);return TRUE;/*监视串口错误时使用的函数*/bool ProcessErrorMessage(char* ErrorText)char *Temp = new char200;LPVOID lpMsgBuf;FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_M
5、ESSAGE_FROM_SYSTEM,NULL,GetLastError(),MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), / Default language(LPTSTR) &lpMsgBuf,0,NULL);sprintf(Temp, WARNING: %s Failed with the following error: n%snPort: %dn, (char*)ErrorText, lpMsgBuf, com2);MessageBox(NULL, Temp, Application Error, MB_ICONSTOP);LocalFree(
6、lpMsgBuf);delete Temp;return true;bool openport(char *portname)/打开串口hComm = CreateFile(portname, /串口号 “com1”“com2” 调用方法：bool open; open=openport(com2);GENERIC_READ | GENERIC_WRITE, /允许读写0, /通讯设备必须以独占方式打开0, /无安全属性OPEN_EXISTING, /通讯设备已存在FILE_FLAG_OVERLAPPED, /异步I/O0); /通讯设备不能用模板打开if (hComm = INVALID_H
7、ANDLE_VALUE) /如果被占用或是没有打开时返回的是这个错误代码CloseHandle(hComm);return FALSE;elsereturn true;bool setupdcb(int rate_arg)/设置port的属性DCB dcb;int rate= rate_arg;memset(&dcb,0,sizeof(dcb);if(!GetCommState(hComm,&dcb)/获取当前DCB配置return FALSE;/ set DCB to configure the serial portdcb.DCBlength = sizeof(dcb);dcb.BaudR
8、ate = rate;dcb.Parity = NOPARITY; /奇偶校验值04分别对应无校验、奇校验、偶校验、校验置位、校验清零dcb.fParity = 0; /为1的话激活奇偶校验检查dcb.StopBits = ONESTOPBIT;/停止位个数，02分别对应1位、1.5位、2位停止位dcb.ByteSize = 8; /数据位数dcb.fOutxCtsFlow = 0;dcb.fOutxDsrFlow = 0;dcb.fDtrControl = DTR_CONTROL_DISABLE;dcb.fDsrSensitivity = 0;dcb.fRtsControl = RTS_CO
9、NTROL_DISABLE;dcb.fOutX = 0;dcb.fInX = 0;dcb.fErrorChar = 0;dcb.fBinary = 1;dcb.fNull = 0;dcb.fAbortOnError = 0;dcb.wReserved = 0;dcb.XonLim = 2;dcb.XoffLim = 4;dcb.XonChar = 0x13;dcb.XoffChar = 0x19;dcb.EvtChar = 0;/ set DCBif(!SetCommState(hComm,&dcb)return false;elsereturn true;/*串口读取相关时间设置*/bool
10、 setuptimeout(DWORD ReadInterval,DWORD ReadTotalMultiplier,DWORD ReadTotalconstant,DWORD WriteTotalMultiplier,DWORD WriteTotalconstant)COMMTIMEOUTS timeouts;timeouts.ReadIntervalTimeout=ReadInterval; /读取两个字节间隔最大值mS如超过立即返回不再读取timeouts.ReadTotalTimeoutConstant=ReadTotalconstant; /如果同下面一个都为0 则无论是否读到数据都
11、返回/ 可以毫秒为单位指定一个乘数，该乘数用来计算读操作的总限时时间timeouts.ReadTotalTimeoutMultiplier=ReadTotalMultiplier; / 以毫秒为单位指定一个常数，用于计算读操作的总限时时间 0表示不限时timeouts.WriteTotalTimeoutConstant=WriteTotalconstant;/ 写操作延时 同上timeouts.WriteTotalTimeoutMultiplier=WriteTotalMultiplier;if(!SetCommTimeouts(hComm, &timeouts)return false;el
12、sereturn true;int Clearn() /清除buff中的内容并返回buff中现有数据量的大小并读取错误原因DWORD dwError = 0;DWORD BytesRead = 0;ClearCommError(hComm, &dwError, &comstat);return comstat.cbInQue; /返回buff中数据量/*串口数据接收 读取函数*/void ReceiveChar()BOOL bRead = TRUE;BOOL bResult = TRUE;DWORD dwError = 0;DWORD BytesRead = 0;char i=0,n;char
13、 RXBuff;j=0;while (i-n)n=i;Sleep(10);bResult = ClearCommError(hComm, &dwError, &comstat);i=(char)comstat.cbInQue; for (;i0;i-)if (bRead)bResult = ReadFile(hComm, / Handle to COMM port&RXBuff, / RX Buffer Pointer1, / Read one byte&BytesRead, / Stores number of bytes read&m_ov); / pointer to the m_ov
14、structure/ printf(%c,RXBuff);cRecsj+=(char)RXBuff;if (!bResult)switch (dwError = GetLastError()case ERROR_IO_PENDING:bRead = FALSE;break;default: break;elsebRead = TRUE; / close if (bRead)if (!bRead)bRead = TRUE;bResult = GetOverlappedResult(hComm, / Handle to COMM port&m_ov, / Overlapped structure&
15、BytesRead, / Stores number of bytes readTRUE); / Wait flagbool WriteChar(char* m_szWriteBuffer,DWORD m_nToSend) /写字符的函数BOOL bWrite = TRUE;BOOL bResult = TRUE;DWORD BytesSent = 0;HANDLE m_hWriteEvent;ResetEvent(m_hWriteEvent);if (bWrite)m_ov.Offset = 0;m_ov.OffsetHigh = 0;/ Clear bufferbResult = Writ
16、eFile(hComm, / Handle to COMM Portm_szWriteBuffer, / Pointer to message buffer in calling finctionm_nToSend, / Length of message to send&BytesSent, / Where to store the number of bytes sent&m_ov ); / Overlapped structureif (!bResult)DWORD dwError = GetLastError();switch (dwError)case ERROR_IO_PENDIN
17、G:/ continue to GetOverlappedResults()BytesSent = 0;bWrite = FALSE;break;default:/ all other error codesbreak; / end if(bWrite)if (!bWrite)bWrite = TRUE;bResult = GetOverlappedResult(hComm, / Handle to COMM port&m_ov, / Overlapped structure&BytesSent, / Stores number of bytes sentTRUE); / Wait flag/
18、 deal with the error codeif (!bResult)printf(GetOverlappedResults() in WriteFile(); / end if (!bWrite)/ Verify that the data size send equals what we tried to sendif (BytesSent != m_nToSend)printf(WARNING: WriteFile() error. Bytes Sent: %d; Message Length: %dn, BytesSent, strlen(char*)m_szWriteBuffe
19、r);return true;/*window时间函数 回调*/void CALLBACK TimerProc (HWND hwnd, UINT message, UINT iTimerID, DWORD dwTime)SYSTEMTIME time; /定义机构体变量time GetLocalTime(&time); /取系统时间以指针方式TCHAR strTime256; /程序只有一个作用wsprintf(strTime,%04d-%02d-%02d %02d:%02d:%02d,time.wYear, /就是读取系统时间time.wMonth,time.wDay,time.wHour,
20、time.wMinute,time.wSecond);/然后写进strTimeSetDlgItemText(hwnd,IDC_TIME,strTime); /这个字符串void Main_OnCommand(HWND hwnd, int id, HWND hwndCtl, UINT codeNotify)switch(id)case IDC_SEND: GetDlgItemText (hwnd,IDC_EDIT2,cSends,sizeof(cSends);unsigned n=sizeof(cSends); /n是通知串口将发送字节的长度char send100;wsprintf (send
21、,%s,cSends);WriteChar(send,n-1);SetCommMask(hComm, EV_RXCHAR); /监视串口是否接收有数据ReceiveChar(); /读取串口sbuff中数据cRecsj=0; /将cRecs转为字符串SetDlgItemText(hwnd,IDC_EDIT1,cRecs); break;/*case IDC_RECEIVE: /暂时未用 采用直接显示的方式 break;*/case IDC_CHECK:int ctr;HWND hwndCombo1=GetDlgItem(hwnd,IDC_COMBO1);ctr = ComboBox_GetCu
22、rSel(hwndCombo1);switch (ctr)case 0:cCom=com1;break;case 1:cCom=com2;break;case 2:cCom=com3;break;case 3:cCom=com4;break;case 4:cCom=com5;break;default: cCom=com1;break;if (openport(cCom) SetDlgItemText(hwnd,IDC_EDIT3,OK !); MessageBox(hwnd,串口打开成功！,0); elseSetDlgItemText(hwnd,IDC_EDIT3,FAIL);if(setupdcb(9600)&setuptimeout(1024,0,0,20,1000) /初始化串口属性 波特率9600SetDlgItemText(hwnd,IDC_EDIT4,串口属性设置成功); elseSetDlgItemText(hwnd,IDC_EDIT4,串口初始化失败！);PurgeComm(hComm, PURGE_RXCLEAR | PURGE_TXCLEAR | PURGE_RXABORT | PURGE_TXABORT);default:break;void Main_OnClose(HWND hwnd)EndDialog(hwnd, 0);专心-专注-专业