Products > Test Equipment
Which logic analyzer for FPGA work up to 300-400 Mhz
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markone:

--- Quote from: nctnico on January 08, 2023, 02:24:26 pm ---Sorry, but you are wrong here. There are lots of examples of good open source software. Keep in mind that commercial parties do work on open source software to basically join forces without needing specific agreements to do so. Kicad is one of those examples but there are many more.

--- End quote ---

I said "often", not "always", IMHO Kicad is the only open source tool usable with profit (as I do for small PCBs), otherwise I have more positive examples for HAM radio SDR application than professional electronics.
tggzzz:

--- Quote from: markone on January 08, 2023, 02:05:45 pm ---
--- Quote from: nctnico on January 08, 2023, 02:00:37 pm ---
--- Quote from: tggzzz on January 08, 2023, 01:46:34 pm ---
--- Quote from: markone on January 08, 2023, 12:35:47 pm ---One of the lesson learned in my life is the following : never rely in a open source development for serious things.

My current feeling for my DSLogic plus purchase is that I threw out the window 130 euros, but as we all know sh*t happens.

--- End quote ---

You pay for experience with your money and/or time.

Closed source commercial products are clearly the way forward. I recommend you spend time considering Microsoft Plays For Sure, Microsofts many GUI/Web frameworks (e.g. silverlight), Altium CircuitStudio(?), Micro-Cap simulator, Adobe Flash etc etc etc

Hint: there are no real general distinctions between open source and commercial products, but each product has its own relative advantages and disadvantages. It takes hard-won wisdom to choose.

--- End quote ---
Agreed. Both commercial and open source software can be excellent or suck badly. You can't tell before you investigate a particular piece of software.

--- End quote ---

Commercial products have to satisfy many requirements, if the commercial company fails in that lose customers confidence and go bankrupt, open source projects often are simply training ground for budding programmers.

--- End quote ---

Yes, commercial products are solely designed for the customers benefit, are never a training ground for marketeers/executives, are never abandoned before or after delivering those benefits nor when paying customers are still relying on them, and are never used to gouge unjustifiable sums from customers.
markone:

--- Quote from: tggzzz on January 08, 2023, 03:09:44 pm ---
--- Quote from: markone on January 08, 2023, 02:05:45 pm ---
--- Quote from: nctnico on January 08, 2023, 02:00:37 pm ---
--- Quote from: tggzzz on January 08, 2023, 01:46:34 pm ---
--- Quote from: markone on January 08, 2023, 12:35:47 pm ---One of the lesson learned in my life is the following : never rely in a open source development for serious things.

My current feeling for my DSLogic plus purchase is that I threw out the window 130 euros, but as we all know sh*t happens.

--- End quote ---

You pay for experience with your money and/or time.

Closed source commercial products are clearly the way forward. I recommend you spend time considering Microsoft Plays For Sure, Microsofts many GUI/Web frameworks (e.g. silverlight), Altium CircuitStudio(?), Micro-Cap simulator, Adobe Flash etc etc etc

Hint: there are no real general distinctions between open source and commercial products, but each product has its own relative advantages and disadvantages. It takes hard-won wisdom to choose.

--- End quote ---
Agreed. Both commercial and open source software can be excellent or suck badly. You can't tell before you investigate a particular piece of software.

--- End quote ---

Commercial products have to satisfy many requirements, if the commercial company fails in that lose customers confidence and go bankrupt, open source projects often are simply training ground for budding programmers.

--- End quote ---

Yes, commercial products are solely designed for the customers benefit, are never a training ground for marketeers/executives, are never abandoned before or after delivering those benefits nor when paying customers are still relying on them, and are never used to gouge unjustifiable sums from customers.

--- End quote ---

Sarcasm detected  :D

Are you a keen / proud open source developer / supporter ?

Remaining in thread, do you have an example of open source LA SW / HW system that is barely comparable to a professional product ?
mtk:

--- Quote from: markone on January 08, 2023, 01:55:39 pm ---Dunno if you have ever used Pulseview, with all the respect for developers group it could be good for a newbie in conjunction with 10 dollars Cypress 8Ch LA dongle, for a professional is a joke.

--- End quote ---

The initial release of KiCad was published in 1992 or 31 years ago. In comparison the stable release of libsigrok was released about 3 years ago. Some claim that the sigrok main developer abandoned the project, but as far as I am aware other continue to developing it. There is much more to be desired in terms of capabilities and it takes time and devotion. The main issues with logic analyzers probably is that the advance triggering and filtering suppose to be performed on the accusation module presumably on the FPGA or MCU. In other words, such project suppose to developed the device firmware as well. This might be an issues in most of the cases. Currently, an interesting implementation is sigrok-pico https://github.com/pico-coder/sigrok-pico. It is my understanding that can achieve 250 MHz sampling rate. For 6 USD (WiFi edition) I would say, it is quite an achievement, still there there is lots of work to be done about the WiFi connectivity as well as how this logic analyzer works as whole.
markone:

--- Quote from: mtk on January 08, 2023, 03:38:42 pm ---
--- Quote from: markone on January 08, 2023, 01:55:39 pm ---Dunno if you have ever used Pulseview, with all the respect for developers group it could be good for a newbie in conjunction with 10 dollars Cypress 8Ch LA dongle, for a professional is a joke.

--- End quote ---

The initial release of KiCad was published in 1992 or 31 years ago. In comparison the stable release of libsigrok was released about 3 years ago. Some claim that the sigrok main developer abandoned the project, but as far as I am aware other continue to developing it. There is much more to be desired in terms of capabilities and it takes time and devotion. The main issues with logic analyzers probably is that the advance triggering and filtering suppose to be performed on the accusation module presumably on the FPGA or MCU. In other words, such project suppose to developed the device firmware as well. This might be an issues in most of the cases. Currently, an interesting implementation is sigrok-pico https://github.com/pico-coder/sigrok-pico. It is my understanding that can achieve 250 MHz sampling rate. For 6 USD (WiFi edition) I would say, it is quite an achievement, still there there is lots of work to be done about the WiFi connectivity as well as how this logic analyzer works as whole.

--- End quote ---

As you said, Trigger / Conditional Capture are the aspects where Sigrok fails to satisfy any even barely serious demand.

HW wise you have no input protections and no variable thresholds, software wise you have basic (to say the least) selectable trigger mechanism (rising/falling edges, advanced ones are in another world).

Dunno if this specific branch goes beyond "standard" Pulseview in any aspect, but if I go to its Github page I read :

At this time my pull request into the main sigrok repo has not been accepted.
Thus mainline releases of sigrok cli and pulseview do not support this repo.

 
so, for instance,  you can forget to try it under Windows with an official binary release, you want to venture out in Windows compile process (good luck).
 
As I said, for a newbie / hobby works  those are great tools almost for free, but we are far from something that is remotely comparable to professional ones.

My understanding about DSLogic LAs is that they are mainly used by hackers to trap external memory access in order to exploit application protection mechanisms.
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