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| SALEAE prices ... |
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| mwb1100:
OpenTechLab on youtube has several videos discussing inexpensive logic analyzers and how to use them with the open source sigrok pulseview software. He also talks a bit about the ethics of using Saleae clones - he was a contributor. It boils down to if the logic analyzer is using open source (non-saleae) firmware and software, then it’s “clean”. It’s just a cypress chip using open source software. The videos also demonstrate using sigrok’s PulseView software. Finally there’s an interesting teardown & review of the DSLogic Plus, which is a moderately priced LA that’s not a Saleae clone. - General info on inexpensive LAs: - A teardown of a DSLogic Plus: - Using the DSLogic with sigrok: |
| markone:
--- Quote from: mwb1100 on November 21, 2022, 04:50:34 am ---OpenTechLab on youtube has several videos discussing inexpensive logic analyzers and how to use them with the open source sigrok pulseview software. He also talks a bit about the ethics of using Saleae clones - he was a contributor. It boils down to if the logic analyzer is using open source (non-saleae) firmware and software, then it’s “clean”. It’s just a cypress chip using open source software. --- End quote --- Hi, i never had a single doubt about that, problem is Pulseview is lacking a mandatory feature for my purpose : trigger on byte sequence coming from async serial decoding, i would be glad if i'm wrong :D. In the mean time a put my hands on two different devices : 1) a Kingst LA1010 LA from Amazon 2) an old USBee AX Pro clone First one seems well build, allows to select voltage threshold and support up 50V at logic inputs but ... its own SW is totally unable to trigger on serial decoding output AND the device is de facto not supported under Sigrok, at least windows version. Second one works a treat with Logic 2 (after VID/PID "cure") doing everything i need using Concatenator extension, with a nice realtime trace & decoding display, as i saw at my friend lab some days ago ( he also was unaware about current prices ...). To recap : LA1010 useless, clone OK, so i have to find a legit low cost Saleae device, i cannot show the oriental clone & Saleae SW with my customers. But after having spent at least one hour searching on the web it seems impossible, there are only few sad men selling old inventory at tripled cost. I also found out that after Saleae price increase most of Chinese clones doubled (at least) in price, especially ones with 16CH and FPGA and i also found out a couple of official statement from Saleae published to justify the HUGE cost increase (as if the global crisis was their only problem) and i also spotted their romantic video about the art of debugging, like every thing was made by their device in automated fashion. if we follow their reasoning a Rigol DS1054Z should cost at least 1000USD (plus taxes) and thinking what was inside their old budget model sold at 109 USD i struggle to believe that it was impossible to make some margin. Reality is that now they are doing hundreds from a single device, but i wonder how many they are selling. |
| Fungus:
--- Quote from: markone on November 21, 2022, 01:13:27 am ---Which applications support it ? --- End quote --- https://digilent.com/shop/software/digilent-waveforms/ |
| voltsandjolts:
--- Quote from: markone on November 21, 2022, 12:20:13 pm ---trigger on byte sequence coming from async serial decoding --- End quote --- USB analysers in the price range you are looking at do not support triggering on uart decode, or any kind of decode. You get edge/level triggers and combinations of those across channels at best. A possible low cost solution is to make your own trigger circuit. Program a small mcu with uart to toggle a pin when your desired character is seen, then use that pin as a trigger in your chosen LA. If the system you are debugging has an mcu, which you're programming, then use that mcu. Want to spend more money? Take a look at ZeroPlus youtube.com/watch?v=JwEsS7tVnFQ People say good things about them, although I've never liked the look of their GUI. |
| markone:
--- Quote from: Fungus on November 21, 2022, 12:32:50 pm --- --- Quote from: markone on November 21, 2022, 01:13:27 am ---Which applications support it ? --- End quote --- https://digilent.com/shop/software/digilent-waveforms/ --- End quote --- Ok, this evening i will take some time to register and try the software in demo mode, but i wonder if this is the only data analysis application that support it. |
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