86 COMSTAT ComStat; 87 ClearCommError( m_hIDComDev, &dwErrorFlags, &ComStat ); 88 if( !ComStat.cbInQue ) return( 0 ); //检查当前是否有数据在接收队列内 89 dwBytesRead = (DWORD) ComStat.cbInQue; 90 if( limit < (int) dwBytesRead ) dwBytesRead = (DWORD) limit; //确定当前可能读入的...
1、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,cSends...
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 RXBuff; j=0; while (i-n) { n=i; Sleep(10); bResult = ClearCommError(hComm, &dw...
45、artMonitoring()BOOL CSerialPort:StopMonitoring()void CSerialPort:WriteChar(CSerialPort* port)void CSerialPort:ReceiveChar(CSerialPort* port, COMSTAT comstat) void CSerialPort:WriteToPort(char* string)3. 监测线程接收事件信息,再进行消息处理即可。SerialPort类的应用基于对话框的串口程序开发:1. 将SerialPort...
ClearCommError(m_hCom, &dwErrorFlags, &ComStat); PurgeComm(m_hCom, PURGE_TXABORT|PURGE_TXCLEAR); OVERLAPPED osWrite;memset(&osWrite,0,sizeof(OVERLAPPED)); HANDLE hEventSend = CreateEvent(NULL, TRUE, FALSE,NULL);//这个事件必须为手动复位osWrite.hEvent = hEventSend; ...
ClearCommError(idComDev,&dwErrorFlags,&comStat); //EB_Printf("[DBG:EV_ERR=%x]\n",dwErrorFlags); } } CloseHandle(os.hEvent); _endthread(); } //读取串口缓冲区 int ReadComBuf(unsigned char *buf, int maxLen) { unsigned int time=0; ...
ClearCommError ( hCom , &dwError , &ComStat );//检查串口接收缓冲区中的数据个数 ReadFile(hCom, //串口句柄 ucRxBuff, //输入缓冲区地址 ComStat.cbInQue, //想读入的字符数 &BytesRead, //实际读出的字节数的变量指针 ov_Read); //重叠结构指针 }//这是上面声明的函数的定义 9楼2012-06-28 ...
1.3.3.6 `COMSTAT`函数 1.4 关闭串口 1.4.1 `CloseHandle`函数 1、概述 在工业控制中,工控机(一般都基于Windows平台)经常需要与智能仪表通过串口进行通信。串口通信方便易行,应用广泛。 一般情况下,工控机和各智能仪表通过RS485总线进行通信。RS485的通信方式是半双工的,只能由作为主节点的工控PC机依次轮询网络上的各...
COMSTAT TComStat CREATESTRUCT TCreateStruct CTLINFO TCtlInfo CTLSTYLE TCtlStyle CTLtype TCtltype DCB TDCB DDEAACK TDDEAck DDEADVISE TDDEAdvise DDEDATA TDDEData DDEPOKE TDDEPoke DEBUGHOOKINFO TDebugHookInfo DELETEITEMSTRUCT TDeleteItemStruct DEVMODE TDevMode DOUBLE Double DRAWITEMSTRUCT TDrawItemSt...
获取进入串口缓冲区数据的字节数DWORD dwErrors;// 错误信息COMSTAT Rcs;// COMSTAT结构通信设备的当前信息intLen=0;DWORD length=100;//用来接收读取的字节数charpath[]="./test.txt";intfd=0,n=1;fd=open(path,O_RDWR|O_CREAT);//write(fd,"H,class\n",8);while(1){for(inti=0;i<100;i++)...