diff options
| -rw-r--r-- | src/serialport_win.cpp | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/src/serialport_win.cpp b/src/serialport_win.cpp index 8caba504..af43f799 100644 --- a/src/serialport_win.cpp +++ b/src/serialport_win.cpp @@ -107,8 +107,6 @@ protected: if (!dptr->readSequenceStarted) dptr->startAsyncRead(); } - if (EV_TXEMPTY & dptr->eventMask) - dptr->startAsyncWrite(SerialPortPrivateData::WriteChunkSize); ::WaitCommEvent(dptr->descriptor, &dptr->eventMask, &dptr->eventOverlapped); } return ret; @@ -248,6 +246,10 @@ bool SerialPortPrivate::open(QIODevice::OpenMode mode) } if (eventMask & EV_TXEMPTY) { + // Disable EV_TXEMPTY for CommEventNotifier because not all serial ports + // (such as from Bluetooth stack of Microsoft) supported this feature. + // I.e. now do not use this event to write to the port. + eventMask &= ~EV_TXEMPTY; ::memset(&writeOverlapped, 0, sizeof(writeOverlapped)); writeOverlapped.hEvent = ::CreateEvent(NULL, FALSE, FALSE, NULL); writeCompletionNotifier = new WriteCompletionNotifier(this, q_ptr); @@ -804,8 +806,11 @@ bool SerialPortPrivate::completeAsyncWrite(DWORD numberOfBytes) if (numberOfBytes > 0) emit q_ptr->bytesWritten(numberOfBytes); - else + + if (writeBuffer.isEmpty()) writeSequenceStarted = false; + else + startAsyncWrite(WriteChunkSize); return true; } |