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277 lines
9.7 KiB
277 lines
9.7 KiB
This is TODO Tue Nov 13 14:54:06 MST 2001
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----------------------------------------------------------------------------
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HIGH PRIORITY TODO's
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----------------------------------------------------------------------------
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Win32 Frame Parity CD and RI events. TIOCGICOUNT is commented out in
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win32termios.h to avoid SIG11's. The source of these has not been
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identified. I could not figure this one out. If BlackBox is run on COM1
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and COM2 and you plug in a null modem cable between the ports things blow
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up. I dont know if variables is on the native side get gc'd or if there
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is a bad pointer someplace.
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The next bug is also report using BlackBox on Win32:
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"Using all of the default settings, if I click auto-transmit it
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runs for about half a second and then crashes. I've attached the log file
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it gave. Sometimes it runs a little longer than others. If you enable and
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disable auto-transmit repeatedly it seems to help it crash faster. This
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looks like a fairly repeatable way to cause the problem so hopefully
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debugging would be easier." I'm going to try looking at this tonight.
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And the final bug report is reported on FreeBSD 4.5 with some in house
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software:
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"Okay, now the application runs. I don't get a sig11, but my application
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freezes when it tries to talk to the modem. The user has access to the
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modem as minicom works on that modem. This application works well under
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windows with the JavaComm from Sun."
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Sat Jul 28 09:55:37 MDT 2001
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----------------------------------------------------------------------------
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REMAINING TODOS
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----------------------------------------------------------------------------
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The following TODO's are known to need work but will not be implmented in the
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near future.
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DSR does not work reliably for some people. contrib/DSR-workaround.java
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contains a workaround the Ken Eisner contributed. If you are able to reproduce
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the problem and find a fix for RXTX please let the maintainer know.
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Buffer Size is just a var. No memory is allocated. This was done to duplicate
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the behavior in the behavior table in javax.comm.CommPort.html. Its not clear
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to me if the buffers are just mallocs or modem buffers. Any experts there?
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(its probably refering to fopen()/fread()/fwrite()/fclose() which may or may
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not be of interest to someone)
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While looking through the blackdown mail list, it was obvious that some people
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really want printer support. Here is a chance to put it in themselves.
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ParallelPort and CommPortIdentifier files are provided so you can start
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implementing right away without worrying about how automake works. They are
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not written in stone. If you want to do it differently feel free.
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The good side is the stuff compiles as is. Write was tested on a printer.
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Currently (rxtx-1.4-5) sun's jdk (version 1.2.2_006) with native threads is
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locking up with multiple open()/closes(). Its ugly. The stack trace is
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useless. No insight from jdb. The green threads are working.
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I'd suggest avoiding native threads with 1.2.2_006 unless you can figure out
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whats going wrong.
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----------------------------------------------------------------------------
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Porting Status.
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----------------------------------------------------------------------------
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Irix SerialPort support
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I've heard it works. I didnt get an exact diff back but it should work.
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rxtx-1.5 has not been tested. Last report was that the library built
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but there was unsatified link errors when an application was run.
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The following showed up in the build:
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/usr/include/standards.h:128: warning: `_NO_POSIX' redifined
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/usr/include/standars.h:156: warning: `_NO_XOPEN4' redefined
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ld32: WARING 84: /usr/lib32/libc.so is not used for resolving any symbol
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*BSD SerialPort support
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freebsd serial works.
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kernel specific implementations
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possibly a buggy event loop.
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AIX
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It has not been confirmed that AIX works. I've heard of people building
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it though
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WinCE
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WinCE should work now
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The following should work with Serial communication. Sometimes breakage slips
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in.
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Solaris (x86/Sparc), OpenUnix, UnixWare, Digital Unix, True64,
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Mac OS X, HP-UX, Win32.
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If you would like to donate ssh access for any of these for compile tests before
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release contact taj@www.linux.org.uk. We have Solaris x86 2.6 and 2.8. Also
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a DEC UDB without an OS. Binaries will be offered if access to build boxes is
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provided.
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Win95/98/ME/NT/2K/XP with mingw32
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Long story there. Ever put together a few hundred lines of code for
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fun and then have to support it 4 years later?
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It started as mentioned with some toy code while playing with cross
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compilers.
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The Wayne Roberts provided many improvements.
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Another big push was made after this.
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The code should be fairly good now.
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Some of the builds are hairy.
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The library was tested (rxtx-1.5-4). The library built and installed
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using lcc and mingw32(on windows and from linux)
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The library passed multiple tests after rxtx-1.5-7.
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files:
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SerialImp.c termios based JNI code
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SerialImp.h ""
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termios.c termios implementation for win32
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win32termios.h ""
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init.c lcc dll support
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init.cc mingw32 dll support
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fixup.c mingw32 dll support
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Makefile.lcc static Makefile for building with lcc
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Makefile.cc static Makefile for building with mingw32
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The following other options are possible but not started
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use cygwin.dll and release rxtx under the GPL
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replace SerialImp.c/h with something that does not use termios.
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win32 API documentation:
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ftp://ftp.cs.virginia.edu/pub/lcc-win32/win32hlp.exe
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Microsoft Online Library:
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http://msdn.microsoft.com/
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Serial API doc:
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http://msdn.microsoft.com/library/techart/msdn_serial.htm
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BeOS
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BeOS support is in the early stages. It should read and write bytes
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See the BeOS documentation for more information. See rxtx-2.1 for
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details. This effort is mostly abandoned.
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----------------------------------------------------------------------------
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File specific thoughts
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----------------------------------------------------------------------------
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RXTXPort.java
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framing control -?-
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buffer control -?-
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look for FIXME
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ParallelPort support. Needs some code.
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files:
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ParallelImp.c stubs
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A large fraction of the stubs are filled in now.
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ParallelImp.h
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LPRPort.java similar to RXTXPort.java + stubs.
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Printer support is working with simiple print tests.
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Full support for printing will be put in when 2.4 linux kernels
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are mainstream.
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----------------------------------------------------------------------------
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From This point on, You need to use rxtx 1.5. All of this work is
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being done in the development branch of the cvs archive.
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cvs checkout -r commapi-0-0-1 rxtx-devel
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gets the recent work.
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----------------------------------------------------------------------------
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RS485 Support
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This is intended to be an rs232->rs485 driver.
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The basic layout is in place with no native implementation.
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devices are not coded into RXTXDriver.java see /dev/ttyS0 and gang
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for examples.
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Nothing is carved in stone. Changes will probably be needed in
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several of the files.
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So far the only significant difference between RS485Imp.c and RXTXImp.c
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is writeByte and writeArray raise and drop DTR as needed. I've not
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spent a large amount of time on this. It compiles. I need to find
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an RS485 device to test this.
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I could picture enumerating the devices on the bus similar to
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enumerating ports with 232 comm. It could be possible to build
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the packets with vendor specific bits.
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files:
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RS485.java
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RS485Port.java
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RS485PortEvent.java
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RS485PortEventListener.java
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I2C Support
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The basic layout is in place with no native implementation.
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devices are not coded into RXTXDriver.java see /dev/ttyS0 and gang
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for examples.
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Nothing is carved in stone. Changes will probably be needed in
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several of the files.
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I want I2C support for a recycling infusion mash system (home brewery)
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I'm looking at building. Who said there isnt free beer?
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files:
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I2C.java
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I2CPort.java
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I2CPortEvent.java
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I2CPortEventListener.java
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I'll be returning to this after I order the parts for dallas semi.
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CommPortIdentifier support. Needs some code.
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This is starting to shape up. Maybe 100 lines from a the full
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montey. Grep for FIXME for known bad spots.
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Ownership needs work. BlackBox fires up, finds the ports and
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read/writes with the rxtx implemented comm.jar.
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This has actually expanded to a complete comm.jar implementation.
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Contact the maintainer if you have interest in working on this.
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While automatic enumeration of ports needs some work you can
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open specific ports.
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Plenty of example code can be found in commapi/samples/porting
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Please don't send in Sun's code.
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files:
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CommDriver.java
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CommPort.java
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CommPortEnumerator.java
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CommPortIdentifier.java
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CommPortOwnershipListener.java
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SerialPort.java
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SerialPortEvent.java
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SerialPortEventListener.java
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UnsupportedCommOperationException.java
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NoSuchPortException.java
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OwnershipEventThread.java
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ParallelPort.java
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ParallelPortEvent.java
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ParallelPortEventListener.java
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PortInUseException.java
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------------------
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backwards compatibility for older Linux systems.
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------------------
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non Linux specific implementations
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------------------
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allow the library to catch sigint so it can shut down the port properly when
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sent
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------------------
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Add more documentation.
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------------------
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----------------------------------------------------------------------------
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IDEAS
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----------------------------------------------------------------------------
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Make rxtx apps capable of being spawned from mgetty. <gluck@tempo-services.com.au>
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Lock file server for multiple users: see src/lfd.
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