// Error in WaitCommEvent. break; } 问题出现在:当多个字节连续的发送,第1个byte到,引起EV_RXCHAR 事件发生, WaitCommEvent指示可读.第2个byte紧接着到,EV_RXCHAR只是在内部置位, 当第1个byte读完,调用WaitCommEvent时,系统再次指示EV_RXCHAR 事件发生, 可读第2个byte,问题出现在当第2个字符到达,而没有被读出...
读取事件:使用WaitCommEvent函数等待串口事件,并检查RI事件是否发生。 读取数据:如果RI事件发生,使用ReadFile函数读取数据。 示例代码 代码语言:txt 复制 #include <windows.h> #include <stdio.h> int main() { HANDLE hSerial; COMMTIMEOUTS timeouts; DWORD bytesTransferred; DWORD errors; DWORD eventMask; /...
一、进程 创建进程： CreateProcess("C:\\windows\\notepad.exe",0,0,0,0,0,0,0,&si,&pi); ...
if (WaitCommEvent (hCom, &dwMask,&os)) { switch(dwMask) { case EV_RXCHAR: memset (recv_buff, '\0', 64); recv_from_com (&os , recv_buff); dwLen = MultiByteToWideChar (CP_ACP, 0, recv_buff, -1, NULL, 0); pwText = new TCHAR [dwLen]; MultiByteToWideChar (CP_ACP, 0, rec...
int OpenComPort(int port, int userBaudRate);//打开串口 //关闭串口 void CloseComPort(void);//关闭串口 int ReadComBlock(unsigned char *buf,int maxLen); void _DoRxTx(void *args); int ReadComBuf(unsigned char *buf, int maxLen);//读串口 ...
if(WaitCommEvent(pTTYInfo-＞idComDev,&&dwEvtMask,NULL)){ if((dwEvtMask && pTTYInfo-＞dwEvtMask )== pTTYInfo-＞dwEvtMask){ WaitForSingleObject(pTTYInfo-＞hPostEvent,0xFFFFFFFF);ResetEvent(pTTYInfo-＞hPostEvent);// 置同步事件对象为非信号态 ::PostMessage(CSampleView,ID_COM1_...
//WaitCommEvent(HSC_COM_Handle,&EvtMask,&HSC_Ovread); //ClearCommError(HSC_COM_Handle,&dwError,&cs); //获得DSR的状态 GetCommModemStatus(HSC_COM_Handle,&ModemState); ModemState = (ModemState & MS_DSR_ON); if(ModemState == oldModemState) continue; ...
ifnotWaitCommEvent(CommHandle,dwEvtMask,@overlapped) then begin ifERROR_IO_PENDING=GetLastErrorthen GetOverLappedResult(CommHandle,overlapped,dwTranser,True) end; //串口读事件发布消息 if((dwEvtMaskand EV_RXCHAR)=EV_RXCHAR) then begin //等待允许传递WM_COMMNOTIFY通讯消息 WaitForSingleObject(Postevent,INF...
WaitCommEvent( __in HANDLEhFile, __inoutLPDWORDlpEvtMask, __inout_optLPOVERLAPPEDlpOverlapped ); hFile:标识通信设备,CreateFile函数返回的句柄。 lpEvtMask:指向一个32位变量,该变量接收一个指示所发生的事件类型的掩码。如果出错,该参数被置为0。 lpOverlapped:指向一个OVERLAPPED结构。如果打开hFile标识的通信...
if (WaitCommEvent(hCom, &dwEventMask, &oRead)){ ReadFile(hCom, buf, 100, 0, NULL); } cout << "收到的串口数据:" << buf << endl; CloseHandle(hCom); return 0; } ``` 以上示例程序实现了通过串口控制火花机启动、等待接收数据、并停止。初学者可以根据需要对代码进行修改,以实现自己需要的...