Logic Analyzer
Pinoy NYC
Posts: 30
Good Day,
I would like to thank parallax for selling a very affordable oscilloscope, this helps me a lot with all of my projects...
Did you guys ever consider making a logic analyzer also?...·[noparse]:)[/noparse]
-Pinoy
·
I would like to thank parallax for selling a very affordable oscilloscope, this helps me a lot with all of my projects...
Did you guys ever consider making a logic analyzer also?...·[noparse]:)[/noparse]
-Pinoy
·
Comments
That said, commercial models are waaaaay too expensive for hobbyists, so if Parallax or someone could make a simple model at an affordable price, I would jump at it and even preorder it myself.
(I collect and repair vintage portables and there's only so much you can do with a multimeter, logic probe or a single-channel scope)
For those who doesn't know what it is and what it can do...
It's an instrument which can sample many digital inputs simultaneously and display the logic states onto a screen.
(That's the very basic function)
They can usually also log this state-information onto disk for later replay.
More advanced functions can be to connect 16 (or more, depending on the processor being used)probes to the address pins of a CPU and when the computer is running, build a map of which areas of RAM/ROM is actually used.
Connect another 8 to the data-bus and the Read/Write pins and it is capable of reading the program that is being executed, and the data that is being read/written to RAM and possibly even to IO.
Some can even(by loading 'personality modules') take the program code and display the assembly-language.
All in all, it's a VERY useful debugging tool....
http://www.saelig.com/ANT8.htm
That's an 8port USB connected model which can sample at up to 500MHz(That's a 2nS resolution!) and at $222 it's a steal.
There's an 16port model from the same manufacturer, too.
(But I want a 32port model
http://www.tech-tools.com/dv_main.htm
And a 32channel Parallellport model for 587euro(only comes with a few probes, so you'll need to buy extras. They also sell SMT adapters)
http://www.etcsk.com/products/m611/index.php?lang=eng
The USBee series which are 8port models, but have many other uses...
http://www.usbee.com/
Gosh, there's a lot of them out there...
USBee makes 8 bit USB devices and offers a probgram for it that makes it a logic analzyer.
You can hook up to 64 USBee units at once but you would only need 4 to get the 32 bits required for
8 bit CPU work.
You would have to modify the USBee Visual Basic source code to view the results all at once and have them
interrelated.
This would be a good web group software project!
Lawrence
Is this really a STEALl?... The site looks kinda make me think twice buying the product. it doesn't have a professional image, kinda like a mom/dad home based business.
Any users of this device?
for USBee products, there are some catch, the $300 product cant save data to disk, you have ot buy the $400 dollar version to do that.
for bitscope, the cheapest logic analyzer is almost $300, and you still have to buy the connector POD.
Anybody here using the products above? any recommendations.
Don't be too quick to judge the technical merit of a product based upon the appearances of the site. Visit some of the sites of forum members who have developed and sell products. You'll find a few that aren't all razzle dazzle, but the products they sell are good. Which would you rather have, money invested in hiring a high end marketing company, graphic artists and web developers, or developing a good product sold for not a lot of money?
You can always test them out. Send them an email asking some specific questions about how you envision using their product. See what there responses are. Just keep in mind that the wording and nature of your inquiries may well affect the wording and nature of their replies.
Jim
the Saelig site promotes the 8channel USBee model...
I linked to it because it seemed a decent review, not because of how the site looked.
Whether or not the USBee 8channel models can be linked closely enough to actually do the work of a 32channel 'pro' model, though, is another question.
can you tell us where did you buy yours?...
Within two days we will announce a mass-produced logic analyzer for the 24-pin BASIC Stamps. Cost will be under a hundred bucks.
We're preparing the product for release right now. Manufacuring and design is complete.
Ken Gracey
Parallax, Inc.
Ken
Yippee Skippee!!!
QUICK!!· what other products should they sell!
How about something better than Rogaine!·
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Steve
http://members.rogers.com/steve.brady
"Inside each and every one of us is our one, true authentic swing. Something we was born with. Something that's ours and ours alone. Something that can't be learned... something that's got to be remembered."
We already have that...
It's this forum...
(Assuming that Rogaine is a 'feel-good' drug)
It's already available. It's call a Norelco. Or at least that's the path I choose.
Jim
Norelco?· I'm a Gillette man!
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Steve
http://members.rogers.com/steve.brady
"Inside each and every one of us is our one, true authentic swing. Something we was born with. Something that's ours and ours alone. Something that can't be learned... something that's got to be remembered."
With the incredible support we get here there's very little hair-pulling and therefore minimal hair-loss...
Those who lacks in hair suffers because they started with the Stamps too late in life
On that note...
I would really like a faster BS with heaps more program and variable space, interrupts and multitasking.... And I want it cheap...
(It's worth a try... )
Or first started trying to figure out electronics way before the stamp was even somebody's fantasy.
These people have the ANT-8 and ANT-16.
I've also used the USBEE platform, and it is excellent, though a little more pricey. I'm glad Parallax is coming out with their own 24-pin unit -- 8 and 16 pins are nice and all, but I'd really like 16-bits of address and 8-bits of data -- or even 8-bits of address indicator and 16-bits of data.
It'll be interesting to see how many channels it really has, what speed it can sample at and which functions it comes with.
for less than hundred bucks???
could be, 8 channels, around 20MHZ, with basic logic analyzer functionality, is fine for me.
But if you can add the following, it will be AWESOME!
- Signal Generator
- Pulse Playback
- Frequency Counter
- (I dont know what else the guys out there needs)
Any updates?... I checked parallax.com, still can't find anything regarding logic analyzer.
just looking forward on this.
Thanks.
>
>Within two days we will announce a mass-produced logic analyzer for the 24-pin BASIC Stamps. Cost will be >under a hundred bucks.
>
>We're preparing the product for release right now. Manufacuring and design is complete.
>
(Othervise the money will be converted into Anime DVDs...
[*]34 Channels [*]500MHz Timing mode sample rate [*]200MHz State mode sample rate [*]Real-time Sample Compression [*]Multi-level trigger [*]+6V to -6V Adjustable Threshold [*]USB Powered [*]Probe and USB cable included
http://www.circuitspecialists.com/prod.itml/icOid/8251
Cost is $369
if you read the previous post, you probably know why we are here waiting for the announcement. [noparse]:)[/noparse]
Gadgetman was interested on· a 32 ports. He wrote:
"That's an 8port USB connected model which can sample at up to 500MHz(That's a 2nS resolution!) and at $222 it's a steal.
There's an 16port model from the same manufacturer, too.
(But I want a 32port model
So, relax.
I did not mean to screew-up your waiting.
No documentation for the Logic Analyzer has been posted yet.