Search found 645 matches

by paul
Thu Jun 26, 2008 5:38 am
Forum: Development
Topic: wiring BBB
Replies: 6
Views: 11629

Re: wiring BBB

OK, the customers have spoken. Time to get busy on this one.
Spark Fun also sells the Wiring Board.

Paul
by paul
Thu Jun 26, 2008 5:36 am
Forum: 8x8 LED board
Topic: Data-flow along the panels
Replies: 2
Views: 7616

Re: Data-flow along the panels

Finchnixer, You've got it exactly right - the data flows fifo fashion through all the chips. It's really just one big serial chain. The data for the last panel is sent first, and the panel that the microcontroller is connected to is last. The only complexity is that with multiple panels you need to ...
by paul
Sun Jun 22, 2008 12:09 am
Forum: BBB
Topic: Problems with serial communication
Replies: 9
Views: 12923

Re: Problems with serial communication

Thanks for the post grinan, Is this for a Parallax Ping? There are five or six of thess sonar sensors out there, they all work in a similar fashion but the interface (& coding) details are slightly different. They are optimized in different ways too. The Ping sensor, for example, sees walls well, bu...
by paul
Fri Jun 20, 2008 9:03 pm
Forum: Development
Topic: wiring BBB
Replies: 6
Views: 11629

Re: wiring BBB

Michele,


Not quite sure what you mean. They RBBB's ship with Arduino Diecimila bootloaders.

Is this a reference to the Wiring Board (Atmega128)?

Paul
by paul
Tue Jun 17, 2008 11:06 pm
Forum: BBB
Topic: BBB board and ftdi cable under lInux
Replies: 7
Views: 14392

Re: BBB board and ftdi cable under lInux

Ask and you shall receive. Here's the patch for Linux to make autoreset work with the FTDI cable, courtesy of one of my customers.
I've renamed it LinuxFixArduino.zip and it can be found here http://moderndevice.com/connect.shtml

Enjoy

PB
by paul
Thu Jun 05, 2008 7:35 pm
Forum: RBBB
Topic: Auto reset problem
Replies: 21
Views: 38207

Re: Auto reset problem

OK, the plot thickens in regards to the auto-reset problem. This concerns Linux users, but I'll bet something similar must be going on in certain versions of windows, and the "set RTS on close" is just a correction for the way Arduino IDE handles the serial port (vis a vis DTR / RTS lines). As I sai...
by paul
Thu Jun 05, 2008 7:22 pm
Forum: RBBB
Topic: Auto reset problem
Replies: 21
Views: 38207

Re: Auto reset problem

Users should also check this link in my forum, which is also pointing to the auto-reset issues with the DTR line, and potential fixes. Hopefully David Mellis will be forthcoming in tracking this down, and getting the fix into core. If not I'll just have to post patched copy of the Arduino IDE on my ...
by paul
Thu Jun 05, 2008 7:15 pm
Forum: BBB
Topic: BBB board and ftdi cable under lInux
Replies: 7
Views: 14392

Re: BBB board and ftdi cable under lInux

Thanks for tracking this down Steve - the problem seems to be in how Arduino IDE handles the serial port. Users can check the link above, which also points here: http://www.ladyada.net/forums/viewtopic.php?t=4703 I'm not enough of a hard-core coder to have followed all of the fix, but if Mellis does...
by paul
Tue Jun 03, 2008 12:03 pm
Forum: BBB
Topic: BBB board and ftdi cable under lInux
Replies: 7
Views: 14392

Re: BBB board and ftdi cable under lInux

Did you get FTDI drivers installed. With the Mac and Windows, you can check this by plugging / unplugging cable and the listing for the serial port goes away in the Arduino IDE. I'm not sure how Linux handles this though. There is lots of discussion about the FTDI drivers vis a vis Linux in the Ardu...
by paul
Tue Jun 03, 2008 12:00 pm
Forum: RBBB
Topic: Auto reset problem
Replies: 21
Views: 38207

Re: Auto reset problem

The Diecimila schematic has two paths, one cap on RTS and one on DTR. Do Diecimila users ever see the problem? The Diecimila uses the DTR line for reset signalling I believe, most of the time though the RTS line will parallel the DTR line, except when it doesn't I guess. I suggested to the Arduino ...
by paul
Sun Jun 01, 2008 7:30 pm
Forum: RBBB
Topic: Problem with RBBB
Replies: 7
Views: 9020

Re: Problem with RBBB - postscript

This turned out to be a broken trace on the positive power line, at the USB jack. I don't know if the customer did any swapping of parts or other repair on the board, I did a continuity test of 50 boards for a quick check and found no problems. Will watch to see if this problem surfaces again, but I...
by paul
Thu May 29, 2008 12:03 pm
Forum: RBBB
Topic: Auto reset problem
Replies: 21
Views: 38207

Re: Auto reset problem

Well I'm stumped. If it consistently resets after reboot then it seems like you must have the capacitor in correctly. From there my only guess is that it's something with the way Windows handles the serial port. Setting the "set RTS on close" checkbox has cured all the other cases of this I've come ...
by paul
Wed May 28, 2008 4:21 pm
Forum: RBBB
Topic: Auto reset problem
Replies: 21
Views: 38207

Re: Auto reset problem

It's really hard for me to say what the problem is since this is a scratch built board, and not one of mine. If the it works with a manual reset, I would say that the problem may be in the reset system. Are you using a 10k pullup resistor? And a .1 ufd (104) coupling capacitor to the RTS line? Witho...
by paul
Mon May 26, 2008 8:45 pm
Forum: RBBB
Topic: Auto reset problem
Replies: 21
Views: 38207

Re: Auto reset problem

This is the exact symptom of the problem. It will download one time only after reseting the serial port (probably requires a reboot).

Please change the appropriate serial port settings and your problems will be over.

Paul
by paul
Sun May 25, 2008 11:44 am
Forum: RBBB
Topic: Auto reset problem
Replies: 21
Views: 38207

Re: Auto reset problem

You can't really see the reset pulse with a multimeter - it's too fast. You may just be able to see a flicker in between a fraction of volt. This is because multimeters have some circuitry (or physical configuration such as meter) that integrates (averages) the voltage over a time period, usually in...
by paul
Fri May 23, 2008 5:08 am
Forum: Modern Device Policies
Topic: Obscured address on Contact page
Replies: 1
Views: 7046

Re: Obscured address on Contact page

You've got a point there Severian, I'll redo it.

Paul
by paul
Thu May 22, 2008 9:49 pm
Forum: RBBB
Topic: Is this all I need to start?
Replies: 1
Views: 4735

Re: Is this all I need to start?

Severian I think from another page on your website that the FTDI cable will go from a USB port on one of my Linux computers to the plug on the RBBB. Is that right? You are correct about this. The cable and an assembled RBBB will get you programming almost instantly. (After you get the drivers instal...
by paul
Thu May 22, 2008 9:40 pm
Forum: Development
Topic: freeduino nano
Replies: 3
Views: 8042

Re: freeduino nano

I'm watching, and communicating with, Brian Evans about his Nano version (Freeduino Pico), which I think makes a whole lot more sense than the Nano. I was trying to pitch him on all the Freeduino sites going in together on common pricing (and large production run for good prices). I'm also working o...
by paul
Tue May 20, 2008 11:52 pm
Forum: RBBB
Topic: Problem with RBBB
Replies: 7
Views: 9020

Re: Problem with RBBB

OK if you're really stuck, send the thing back and I'll fix it or give you new one. It's worth it to me to see all the error modes in my products and either fix the hardware or the instructions.

Paul
by paul
Mon May 19, 2008 10:24 pm
Forum: RBBB
Topic: Problem with RBBB
Replies: 7
Views: 9020

Re: Problem with RBBB

FTDI does make a 3.3V cable. Did you put a meter on the cable and see if 5V are coming out of the cable? This sounds like it could be a possibility. Did you buy the cable from me? It's possible they had another cable mixed in with a batch, I buy them in fairly large lots so it could well have escape...