[haiku-bugs] Re: [Haiku] #8789: [USB serial] only performs BSerialPort::Read() in 'blocking' mode (was: read doesn't work for serial communication (neither bash's nor BSerialPort::Read()))
- From: "ttcoder" <trac@xxxxxxxxxxxx>
- Date: Fri, 10 Aug 2012 18:50:24 -0000
#8789: [USB serial] only performs BSerialPort::Read() in 'blocking' mode
---------------------------+----------------------------
Reporter: dsuden | Owner: mmlr
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Drivers/USB | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: x86
---------------------------+----------------------------
Comment (by ttcoder):
Whew! Found a successful '''work-around'''. I simply add this after
ffd=port.Open():
{{{
#ifdef __HAIKU__
int flags = fcntl( ffd, F_GETFL );
fcntl( ffd, F_SETFL, flags | O_NONBLOCK );
#endif
}}}
I got the idea while reading the SerialPort.cpp implementation. This fixes
both the serial-test-case outlined above, and tunetracker itself: the
Read() calls are now non-blocking, everything works as it should.
Also had to make my code more flexible for parsing lines, since the USB-
serial driver appears to convert some \r to \n and vice-versa, for some
reason.
Now we're back in business. This ticket can be set to low priority if
nobody else needs it to be fixed.
--
Ticket URL: <http://dev.haiku-os.org/ticket/8789#comment:13>
Haiku <http://dev.haiku-os.org>
Haiku - the operating system.
Other related posts:
- » [haiku-bugs] Re: [Haiku] #8789: [USB serial] only performs BSerialPort::Read() in 'blocking' mode (was: read doesn't work for serial communication (neither bash's nor BSerialPort::Read())) - ttcoder
