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I used to get all sorts of spurious problems, when I tried to run two Javelins on a single, small power supply. I upgraded to a switching power supply providing over an amp, and all the problems...

I have a complicated application involving 2 Javelins, and one of them needs to be reprogrammed frequently. I've noticed an odd and annoying problem - when I plug a serial cable into the RS-232...

How quickly does a shiftout send bits? If the doc describes this, I missed it.

Is there any way to do shiftout as a VP? It would be wonderful to be able to throw bits at a VP and have them sent in...

You probably want a Javelin. The flat memory model saves a great deal of agony. The BS2sx may run faster, though, if you have speed constraints.

OK, this is lame, but before I plunk down $200 I'd like to make sure I have some idea what I'm doing. This is not complete code (hey, I just started reading the mauals today), but will it do what it...

136... ouch. I'd missed that. Ok, it's definitely not a candidate for the complex command parser - it's not uncommon to load in 10-30 commands at a time (at 7 bytes each).

Does anyone make a fast,...

>I can help you if you want to try it after you get your programming tools.

Gee, with a willing victim to help, I can get a lot more ambitious. :-)

My current controller is made up of 2...

>Scott, Can you explain why you need to send data so fast ?

I've probably overspecifed the need for speed - I'm so used to working with Javelins, which are always just a little slower than I...

OK, I'm looking at the code for the serial driven, 16 channel PWM code. Before I put dowm money on a dev environment, I have questions.

I'd like to slam commands from a Javelin to the SX as fast...

I need a chip that can simultaneously handle driving 8 PWM lines and reading one serial data line. Someone suggested the SX chip, which I've never used. I'm reasonably comfortable with interrupt...

I'm out of VPs on my Javelin, and I need to add 1 (or maybe 2) additional PWM outputs. (What I'd actually like to do is move all my existing PWM work to dedicated chips, and use the VPs for other...

It looks like the timer class implements a 32 bit timer. This means the timer wraps every 10.5 hours or so. (I'm rounding off to keep the numbers simple, here).

This should raise all sorts of...

Oring seems to have cleared this up. If Adding is truely wrong, the doc needs to be checked.

This explains much. I'd been wondering why my app seemed to take so long to do serial output on a small handful of bytes. But that small handful of bytes has to be copied before they can be sent,...

Does anyone have information that shows how many VM operations the Javelin can do per second - or better yet, the execution time for each opcode? I know that a line of Java doesn't translate to a...

Have folk used writePin to set multiple pins at once? I understand that you can only set pins 0-7 OR 8-15 in one call, but at one point I summed up some pinids between 8 and 11, called write, and had...

I looked at something like this. Just creating a scheme where you load an address into a counter, and have it go counting up through addresses until you get to some end point, and use those addresses...

I also found this. If I get one, and create a Java class for it, I'll post it. If someone already has one, could they let me know?

http://www.xecom.com/datasheets/XE0068DT.pdf

Could someone email me that doc? Apparently you need to have a Yahoo account to get it... scottm@net1plus.com

Does anyone know of a chip or board that implements an emergency dialer? The idea is that if I generate a logic High, I want a board to wake up, detect dial tone, call a pre-specified number, wait...

Can the debug serial output of one Javelin be connected to the serial input of another? I am wondering if things printed with System.out.print are sent unmodified, or if there are magic bytes also...

That's what I ended up with - A Javelin as a master and a Javelin as a slave, using 11 VPs between them. Not to mention a handful of 8:1 multiplexers so all the inputs could be funneled down to a few...

*mutter* With some hacking, can get all the sounds and phrases I need encoded as individual samples (well, except for announcing numbers, but I can stand the short pauses in those cases.) So I can...

I use ULN2003's for this - an array of 7 darlingtons with diode protection built-in. You run the output line of the stamp straight to one of the inputs of the ULN2003, and the output will drive a...

Nifty. It confirms my suspicion, though - the only way to find the addresses in the chip is by trial and error. That's ok if I don't plan on changing the messages often, but...

It's a pity that...