While experimenting with Mono on Windows I have run across an issue in SerialPort.DiscardInBuffer and SerialPort.DiscardOutBuffer methods. I checked the source code of WinSerialStream.cs (Mono 2.11.4) and found that both methods use costant value PurgeRxClear while DiscardOutBuffer should be using PurgeTxClear instead.
Apart from that PurgeRxClear and PurgeTxClear are defined wrongly as follows
const uint PurgeRxClear = 0x0004;
const uint PurgeTxClear = 0x0008;
while according to MSDN they should be
const uint PurgeRxClear = 0x0008;
const uint PurgeTxClear = 0x0004;
Please correct this issue in WinSerialStream.cs because now it is only possible to clear the Tx buffer of the serial port. Also interoperabilty with .NET is broken due to this issue.
Fixed in master
Notice (2018-05-24): bugzilla.xamarin.com is now in
Please join us on
Visual Studio Developer Community and in the
Mono organizations on GitHub
to continue tracking issues. Bugzilla will remain available for
reference in read-only mode. We will continue to work on open Bugzilla
bugs, copy them to the new locations as needed for follow-up, and add
the new items under Related Links.
Create a new report for Bug 8285 on Developer
Community or GitHub if you have new information to add and do not yet see a matching
In special cases on GitHub you might also want the comments:
GitHub Markdown with public comments
Our sincere thanks to everyone who has contributed on this bug tracker
over the years. Thanks also for your understanding as we make these
adjustments and improvements for the future.