Re: [Flightgear-devel] Joystick issue - peculiar
Hi Stewart, On Sunday 11 March 2007 15:33:17 Stewart Andreason wrote: > Hi Nick, > > I had forgotten about the jstest utility. > > Ok, it does give the range from -32767 to 32767. > > And my joystick does warble on axis 1: > 337, 675, 337, 0, 337, 1013, 337, 0, 337 etc. > > I think the answer to your question is, that 337 is the smallest > sensitivity or level of precision. > It is a normal hardware issue. > > 32767 divide by 100 = 328 > 32767 / 337 = 97.2 (not an exact coorelation, I admit) > > Thus, make sure a dead-band is set that covers 1 to 4 % of the axis. Yes, that makes sense indeed - and in IRC yesterday and with the help of Melchior, we found the solution. For some reason, although when I plug in my JS it all reads 'spot on' it really isn't. Running jscal and calibrating the JS then makes it all work perfectly in js_demo and FG. So perhaps as nothing has used the JS when I plug it in, it doesn't show up as being out of calibration. I also stated that it doesn't affect FG - well, I lied :-) It did do and I didn't notice. I was always fighting the JS a little in keeping the aircraft straight/level etc., but now it is not so imposing and I can fly better with less effect! Also, by using the -p option of jscal, it produces commandline data that can be read back with the -s option, so all I need do is run that little script at startx (or when I plug my JS in) for it to be sorted. So resolved! Thanks for interest and help. Nick > Nick Warne wrote: > > OK, this isn't FG xml issue. js_demo reports correct (-1.0 <-> 1.0 etc.) > > But as soon as I either start js_demo or fgfs, when I check joystick in > > KDE or use the jstest utilty, X Y Z at rest are set to '337'. So > > something recalibrates the stick to that. > > > >>> Why 337? I am stumped. > >>> > >>> Nick - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Joystick issue - peculiar
On Saturday 10 March 2007 19:14:44 Stewart Andreason wrote: > When I run js_demo, I get a number from -1.0 to 0.0 to 1.0 > Where is this level of precision set? > > Ah ha! > I had no dead-band set in my joystick-name-here-or-js0.xml > > Nick, can you find which joystick.xml file it is using? Perhaps looking > thru it will help. OK, this isn't FG xml issue. js_demo reports correct (-1.0 <-> 1.0 etc.) But as soon as I either start js_demo or fgfs, when I check joystick in KDE or use the jstest utilty, X Y Z at rest are set to '337'. So something recalibrates the stick to that. This is what I meant about the deadband stuff from plib: plib-1.8.4/src/js/jsLinux.cxx [sic] // Remove any deadband value already done in the kernel. // Since we have our own deadband management this is save to do so. So I am wondered if kernel sets up the joystick correctly - then plib decides the deadband is wrong and changes/removes it somewhat. I don't know. Nick > >> Nick Warne wrote: > >>> Hi all, > >>> > >>> This is _not_ a bug report, nor perhaps FG specific, but rather a > >>> discussion of a joystick issue I see - now I have seen this, it is like > >>> when you get a little stone in your shoe, but no matter how much you > >>> look, you can't find the bugger - but because you know it's there, you > >>> can't stop thinking about it :-D > > > > Well, I dunno if it is deadband. What causes the X Y Z axes to > > recalibrate to '337' after runing fgfs or js_demo on an otherwise OK > > joystick X Y Z of '0'? > > > > Why 337? I am stumped. > > > > Nick - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Joystick issue - peculiar
When I run js_demo, I get a number from -1.0 to 0.0 to 1.0 Where is this level of precision set? Ah ha! I had no dead-band set in my joystick-name-here-or-js0.xml Nick, can you find which joystick.xml file it is using? Perhaps looking thru it will help. I don't think I can be of further help here. Stewart Nick Warne wrote: > On Saturday 10 March 2007 18:00:45 Stewart Andreason wrote: >> Can the dead band be increased? >> >> My own Thrustmaster joystick is less than consistant about the zero-center, >> but not like you have described. >> >> I have not looked into fixing it myself, yet. >> >> Stewart >> >> Nick Warne wrote: >>> Hi all, >>> >>> This is _not_ a bug report, nor perhaps FG specific, but rather a >>> discussion of a joystick issue I see - now I have seen this, it is like >>> when you get a little stone in your shoe, but no matter how much you >>> look, you can't find the bugger - but because you know it's there, you >>> can't stop thinking about it :-D > > Well, I dunno if it is deadband. What causes the X Y Z axes to recalibrate > to '337' after runing fgfs or js_demo on an otherwise OK joystick X Y Z > of '0'? > > Why 337? I am stumped. > > Nick > - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Joystick issue - peculiar
On Saturday 10 March 2007 18:00:45 Stewart Andreason wrote: > Can the dead band be increased? > > My own Thrustmaster joystick is less than consistant about the zero-center, > but not like you have described. > > I have not looked into fixing it myself, yet. > > Stewart > > Nick Warne wrote: > > Hi all, > > > > This is _not_ a bug report, nor perhaps FG specific, but rather a > > discussion of a joystick issue I see - now I have seen this, it is like > > when you get a little stone in your shoe, but no matter how much you > > look, you can't find the bugger - but because you know it's there, you > > can't stop thinking about it :-D Well, I dunno if it is deadband. What causes the X Y Z axes to recalibrate to '337' after runing fgfs or js_demo on an otherwise OK joystick X Y Z of '0'? Why 337? I am stumped. Nick - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Joystick issue - peculiar
Can the dead band be increased? My own Thrustmaster joystick is less than consistant about the zero-center, but not like you have described. I have not looked into fixing it myself, yet. Stewart Nick Warne wrote: > Hi all, > > This is _not_ a bug report, nor perhaps FG specific, but rather a discussion > of a joystick issue I see - now I have seen this, it is like when you get a > little stone in your shoe, but no matter how much you look, you can't find > the bugger - but because you know it's there, you can't stop thinking about > it :-D > - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Joystick issue - peculiar
Hi all, This is _not_ a bug report, nor perhaps FG specific, but rather a discussion of a joystick issue I see - now I have seen this, it is like when you get a little stone in your shoe, but no matter how much you look, you can't find the bugger - but because you know it's there, you can't stop thinking about it :-D Plug in my USB Microsoft SideWinder Precision 2 Joystick: Mar 10 13:03:46 linuxamd kernel: input: Microsoft SideWinder Precision 2 Joystick as /class/input/input9 Mar 10 13:03:46 linuxamd kernel: input: USB HID v1.10 Joystick [Microsoft SideWinder Precision 2 Joystick] on usb-:00:07.3-2 Now, at this stage KDE joystick app reports everything is OK. All axes, buttons etc. are 100% accurate. Running jstest also reports the same. Now, either running fgfs or js_demo, the joystick works great. But after running either of these two apps, three joystick axes are now 'recalibrated': X, Y and Z axes at 'rest' are all set to 337 *exactly*. Running jstest also now reports X Y Z to be at 337: Axes: 0: 337 1: 337 2: 337 If I now unplug the joystick, and plug it in again, then ALL axes and controls are all perfect again (i.e. X Y Z at rest are 0). It was suggested maybe a hardware issue, but I don't think so as just X Y Z axes are set exactly to 337 after running FG. Reading plib code, I see that the kernel deadband zone is written out as plib uses it's own - could this cause this strange issue? BTW, it doesn't affect FG in anyway - '337' off 0 on a 65535 scale is unnoticeable in real life. Nick - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
