Serial Hardware Flow Control is not working
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Key: DIRMINA-740
URL: https://issues.apache.org/jira/browse/DIRMINA-740
Project: MINA
Issue Type: Bug
Affects Versions: 2.0.0-M6
Environment: Very different behaviours seen on Linux and Windows
environments. Issues may be related, or may just both coincidentally happen
on hardware flow controlled ports.
Reporter: boB Gage
Linux machines:
Attempting to connect to a device using hardware flow control (RTS/CTS) fails
to accumulate any incoming data regardless of the FlowControl constant sent to
the SerialAddress constructor.
External program (old C++ version of same application) confirms device does
respond to requests after port opened as 19200 8E1 with RTS/CTS flow control --
Mina-based Java app fails to get any incoming data at all. [ This may be
because it has not sent the data it thinks it has, as the far end will only
respond, not initiate. ]
Windows machines:
Attempting to connect to a port using hardware flow control disables the port
for subsequent connections during same execution. [ IOW, once a port is
opened with hardware flow control turned on, no non-flow control protocol is
possible on that port. ] This is especially bad if the
hardware-flow-requiring device driver is attempted on a port connected to a
device not matching the driver (as the proper driver will not be able to open
the port ).
This may or may not be two symptoms of the same root cause.
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