Dead stamp in class

Gn0ver

I was doing some brushing up on my Javelin java-skills, using a boe-bot. At the university I support a couple of students who are actively using the boe-bot within their study programs. Anyway .... I was working on servo control in combination with some sensors and suddenly the program wouldn't download onto the Javelin Stamp no more.

It's really odd. Identifying, testing, resetting ... it all works. But when Javelin IDE says 'downloading program', nothing happens. And after a few seconds I get Error IDE 0022, stating that reading from the serial port has failed. Now I have read all of the posts concerning COM-port settings and stuff, but it just won't work. The BOE worked just fine until at some point I fixed some bugs, clicked on program and got errors. Tried 3 different PC's they all say the same.

Now if somebody has any suggestions on hard resetting the stamp ... clearing the CMOS .... or whatever. I would really appreciate every smart idea. Because I'm all out of it.


Using Javelin Stamp: $50
BOE: USB rev. C
IDE: Javalin IDE 2.0.3

Post Edited (Gn0ver) : 5/18/2008 6:16:19 PM GMT

Peter Verkaik

If the BOE is powered by batteries, try fresh batteries.
Since you have a BoE USB, have you checked this thread:
http://forums.parallax.com/showthread.php?p=656527

regards peter

Gn0ver

Hi Peter,

Thanks for your reply. Come to think of it, I did had a very little program, checking some input ... before it crashed. So it might well be the bug you are mentioning in the post.· Although I once had a smaller program just returning me the max value of an int, and that went without a problem.

Anyway, the problem is that I do not really see where the point is that should be soldered. I'm more like a software guy, in stead of a hardware guy. You say it's SIN and GND that should be soldered with a 1k resistor, at point 2 and 4. Looking at my BOE-usb rev. C .... I have a hard time locating where that is.

Could you shine some more light on that?

Oh and Yeah I have tried fresh batteries, no luck ...

Geoff

EDIT:

I watched the schematics again, and I now understand that you mean the points 2 and 4 of the Stamp socket. So I must solder this at the under side of the board, using a 1k (brown, black, red) resistor?

Post Edited (Gn0ver) : 5/18/2008 7:01:07 PM GMT

Peter Verkaik

Yes, that's right.
If you don't want to solder, you can try inserting the resistor into the socket bending it aside,
and then insert a new socket on it in which you can insert the javelin.

regards peter

Gn0ver

Peter,

I need to say .... you are a genius! I really had the feeling this wasn't going to solve my problem. But now the BOE and Javelin are taking new programs!!! Wooooohhhooooo!!!!!!

I have also updated that terminal.java but I feel it's still not a 100% flawless. I get some weird characters sometimes on the screen, not the ones I typed in.

Anyway, really happy the bot is back online.

Thanks again!

Geoff

Peter Verkaik

The adapted Terminal.java is intended to be used with the Javelin IDE Beta,
although I found it to work with Javelin IDE v2.0.3 also. If you keep getting
wierd characters try the IDE beta.

regards peter

Gn0ver

Peter,

I've noticed that the problem was with the batteries. I had a pair of rechargeable batteries and a bunch of batteries that have been used before. I applied a DC adapter to the BOE and noticed that all went right. After measuring the batteries, it was quite obvious they were to weak to perform.

It's still kinda tricky that if the batteries are almost done, the software (and bot)·will also run differently.

Still happy though [noparse];)[/noparse]