Ported: Javascript for 2010

[biojae]

Oh cool. We can save money on joysticks this year to pay for registration. After all, who uses joysticks these days. We play games with a keyboard and mouse. Maybe we'll do that this year.

Just keep in mind, the driverstation only passes joystick data.
Just try to plug a mouse or keyboard into the bluebox DS and it gives weird results.
Your mileage may vary.

[bronxbomber92]

How fast does the JIT run on the cRIO (say compared to Java)?

[DonRotolo]

Originally Posted by biojae

Just keep in mind, the driverstation only passes joystick data.
Just try to plug a mouse or keyboard into the bluebox DS and it gives weird results.
Your mileage may vary.

Aside from the sarcasm in Bharat's post, the 2010 Driver Station has its own keyboard.

[biojae]

Originally Posted by Don Rotolo

Aside from the sarcasm in Bharat's post, the 2010 Driver Station has its own keyboard.

Yes, it may have its keyboard, but only joysticks are passed.

Originally Posted by Joe Ross, DS Presentation

Joysticks
● Supports 3 joysticks + Stop button or 4
joysticks without stop button

But, if you could make a keyboard look like a joystick to the DirectInput API it would be passed
http://forums.usfirst.org/showthread.php?t=13368

[alivemyst]

Actually, I've written a shell/pair of shells that bypass the driverstation issue--
one exploits the ability of the cRIO to open ServerSockets via javaME's Generic Connection Foundation, so i can pull up a socket on whatever port i like, and either telnet to it or write a proper client app.
The other shell is incomplete, but handles Stdin via an open and undocumented UDP port on the cRIO, passing keystrokes directly to the device. Personally I like the serversocket approach a lot more.

@bronxbomber92: I haven't played with Rhino's AOT compilation system yet, and I know it doesnt have a JIT compiler... so no idea.

On a side note, I'm running into some really nasty hitches in the Java-Javascript wrapper/classloader system, that I believe are the product of the crappy j2me rhino implementation i'm using.
If I cant hack the wrapper system together, I may be forced to switch to a full Java 5 SE version of rhino and will probably retroweave it to work with J2ME. Still that will take a little more work... If anybody knows stuff about this and would like to help out it'd be great. Its eating my hours right now, and I have work.
This is the last hurdle before WPILibJ works fully. If this can be thrown together in a week then it could be released to coincide with the FRC Java release, which would be amazing. 4 Languages for FRC

pm me if you are interested or post here. I can put up a repo &c, although if you are not a beta tester/[hacker] you will have to test your stuff in the SunSPOT environment. Nbd, just no WPILibJ for u!

[EricVanWyk]

Originally Posted by alivemyst

Actually, I've written a shell/pair of shells that bypass the driverstation issue--
one exploits the ability of the cRIO to open ServerSockets via javaME's Generic Connection Foundation, so i can pull up a socket on whatever port i like, and either telnet to it or write a proper client app.
The other shell is incomplete, but handles Stdin via an open and undocumented UDP port on the cRIO, passing keystrokes directly to the device. Personally I like the serversocket approach a lot more.

Please bear in mind that using "undocumented ports" or "bypassing XYZ" run a good chance of only working at home. The at home network is intended to be as open as possible, to allow you the best possible prototyping environment. The at competition network is intended to guarantee good communication to all 6 robots, and may therefore deny some things.

If your communication does not adhere to the specified protocol, you will not have a leg to stand on should it suddenly be blocked.

[nathanww]

As I recall, last year, anything except the standard DS UDP transmissions were firewalled. Some teams built tunneling protocols to sneak video data through, but this would be much more complicated for what you're proposing.

On the other hand, Java...script? I think my brain just exploded.

[alivemyst]

Stdin is now being integrated into FRC Java images, so no more undocumentedness.

Also, I'm working on getting the Java5 version of rhino ported, because it is possible to run Java 5 stuff in J2ME -- see sun's playsim project presentation for a hint.

[Robototes2412]

Did this project die?