Bob Thank you for the detailed update. It's excellent news that the infrastructure will be multi-platform and I look forward to hooking into the new code. I'm sorry not to have been any physical help on the effort but my own baby has been demanding a lot of attention!
Bob -------------------------- Frank is almost done with his final touches to dttsp v2 Linux code which will primarily be a portaudio based program and should run immediately on Linux, OSX, and Windows (under mingw and probably cygwin). I have a fair amount of work to do yet on the hardware code. It must wait until I finish two AMSAT commitments that cannot wait but when done, the Linux will be as completely functional with the hardware as PowerSDR. Transmit, amplifier, atu, etc. will all be enabled so these changes are major and we are determined they be done in a manner consistent with the philosophy we adopted before. Sami and family/friends have allowed us full access to the USB adapter device. Thanks to our Finnish brethren! Eric has started version 2.0 development branch directory in the svn repository (empty as yet). Expect to use the following FREE tools for the development of windows code in our reference implementations. gcc/mingw Visual Studio 2005 Express dttsp v2 using portaudio will be put into the version 2.0 tree as soon as it runs under gcc/mingw and Visual Studio 2005 Express. The languages in the beginning for our reference implementations for 2.0 will be C,C++,C#. You will be able to use these free tools to do your own thing with our building blocks using Visual Basic, Java, small talk, python, common lisp if that is what you want to do. Expect things to be remote capable very early on (almost from the first). Expect us to build this differently from before thanks to the constant guidance from Frank and the excellent example of Bob Cowdery's small talk experiences. The official GUI will be nearly the last thing in the development after the entire infrastructure is built and functional. For all of you CW users, the keyer in version of PowerSDR (SVN 495) is by all accounts the best yet. I began to wake up from the dim witted stupor I had been in for a while and cleaned up the UGLY memory barrier code. The "phase error" reports from WA6AHL and others was very real indeed. When we cleaned up the code doing resets and other manipulations in the ring buffers for the main IF audio, we made the same changes to the cwkeyer and VAC ring buffers. We neglected to take into account the fact that we have yet another thread operating asynchronously and modifying the ring buffers in both the cwkeyer and VAC handlers. In both cases, we have been stepping on the ring buffer manipulations at random times around known critical moments. In the cw keyer case, this has been fixed. In SVN 495, the VAC ringbuffer resets and ring buffer manipulations do not yet have all of the necessary protections. This will be done probably on the weekend. It is going to take a bit more work since C# does not have all of the Platform SDK tools and so these protections must be done in subroutine form in the C code. Please check out the code on CW and give it a beating and complain about problems you find with the internal keyer. We are still working on optimizing the external keyer operation. Now that we have finally understood all of the issues involved, we are finally in a position to move forward with detailed measurements and adjustments. Expect a stable release after these changes are studied and put to bed. Bob -- AMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman Laziness is the number one inspiration for ingenuity. Guilty as charged! _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email. _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
