用ReadFile读串口的问题
用ReadFile读串口,采用重叠overlapped模式读:
OVERLAPPED osReader = {0};
osReader.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
ReadFile(hComm, lpBuf, READ_BUF_SIZE, &dwRead, &osReader);
请问什么时候(什么情况下)hEvent会被signal
一篇文章(http://www.tetraedre.com/advanced/files/msdn_serial.htm)
说当operation complete的时候会signal,那什么是operation complete呢?