whitequark[cis] changed the topic of #glasgow to: https://glasgow-embedded.org · digital interface explorer · https://www.crowdsupply.com/1bitsquared/glasgow · code https://github.com/GlasgowEmbedded/glasgow · logs https://libera.irclog.whitequark.org/glasgow · matrix #glasgow-interface-explorer:matrix.org · discord https://1bitsquared.com/pages/chat
<Darius> sapphire_arches[: I really wonder how many of them they actually sell
<Darius> although I guess most of their customers are unlikely advertise what they use it for
<sapphire_arches[> I think they sell a few thousand to like Cadence and Synopsis who then charge their customers whatever they want
<sapphire_arches[> low volume high margin stuff
<Darius> yeah
<sapphire_arches[> those 2 in particular actually say they're using VU19Ps, I imagine they're working on a VP1902 based product as those become available
<sapphire_arches[> you too can buy a tray of VU19Ps for the low price of $70k USD with a lead time of "we're going to schedule this in to the fab on demand"
<sapphire_arches[> Glasgow Rev X platform =P
<Darius> "Please deposit two (2) gold bars deposit to secure your order"
<fishmonger[m]> While I wait for the Glasgow aluminium case to show up, Is there a 3D model of rev3C that could be used to model a 3D-printable one around?
<_whitenotifier-6> [glasgow] gsuberland synchronize pull request #544: Hardware description documentation for Glasgow revC3 - https://github.com/GlasgowEmbedded/glasgow/pull/544
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<omnitechnomancer> Assuming you don't run into ITAR troubles
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<_whitenotifier-5> [glasgow] gsuberland synchronize pull request #544: Hardware description documentation for Glasgow revC3 - https://github.com/GlasgowEmbedded/glasgow/pull/544
<fishmonger[m]> Rendering one from the KiCAD PCB was surprisingly simple. Off to CAD!
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<whitequark[cis]> <sapphire_arches[> "I think they sell a few thousand..." <- they also sell to Hi-Tech Global
<whitequark[cis]> but obviously no one pays the sticker price
<sapphire_arches[> yeah the digikey listing doesn't even say how many parts per tray....
<sapphire_arches[> I assume it's there because some customer wanted them for unified sourcing, and/or it just came along for the ride with the rest of their product lines in an import
<Darius> lol the XCVU57P is listed for $176k
<joshua_> I was definitely told at nvidia that we did not pay anything near list price for the big-boi xilinx fpgas on the emulation boards, yeah
<Darius> not really surprising, the market for such items is so thin that the price you pay is not market based
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<Attie[m]> looks good!
<Attie[m]> don't forget that Tx and Rx need to be swapped / crossed over... so Tx to Rx, and Rx to Tx
<chmod750[m]> Indeed
<Attie[m]> the args are from Glasgow's pov
<chmod750[m]> VIOA is to power the target device but what is VA SENS for ?
<Attie[m]> also, if you're expecting to receive any data, then the auto baud stuff is very robust, and you can often just leave the argument off
<Attie[m]> Vsense is to monitor the target's voltage - you can use it to turn off the outputs or measure the voltage, etc...
<Attie[m]> if you know the voltage, then you only really need 0v, Tx and Rx
<theorbtwo[m]> You can connect it to a logic-level voltage output from the DUT, and use the -M argument, so the glasgow will use compatable levels.
<theorbtwo[m]> (You can also do a number of other things with it, in theory, it's just an ADC, but that's the big use case.)
<chmod750[m]> 0v ? Do you mean that I only nead VIOA, GND, PA IO0 and PA IO1 ?
<chmod750[m]> need*
<q3k[cis]> vsense is for monitoring voltage and also mirroring it to vio
<q3k[cis]> if you don't need to power your device, you don't need to connect vio
<q3k[cis]> if you know the voltage, you also don't need vsense
<q3k[cis]> if you're not using vsense, you need to do -V 3.3 or something
<chmod750[m]> Got it thanks 🙂
<q3k[cis]> yeah it's a bit complex to wrap your head around at first
<q3k[cis]> i think this is not entirely wrong?
<q3k[cis]> if not,and there's nothing like that in the docs, i could contribute that there
<q3k[cis]> (the diagram mixes physical elements with logical functions, but that's kinda my intention)
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<carlomara[m]> Hi Fine people, I'm getting a bit stumped. What could cause a crash when writing a lot to control registers? I wrote some code to blink an LED (simple hello word) and after 30ish seconds I see it crashing
<carlomara[m]> I used the uart applet as a base, and added an extra pin + control register
<carlomara[m]> After 30ish secs the activity led dies, and glasgow stops responding
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<Attie[m]> I drew up some diagrams a while ago... see: https://github.com/attie/glasgow/commit/18b5933161938734205ff429455bd77e69f33076
<Attie[m]> carlomara: sounds odd... how does it behave with the unmodified UART applet?
<q3k[cis]> Attie: hmm that's _almost_ what i'd like to see at first, but it's not exactly clear from that what vsense is used for (just that it goes into an ADC) and how mirroring works. maybe it could be described in text though
<Attie[m]> yeah - the diagrams went with my FOSDEM21 slides...
<Attie[m]> i don't think the slide deck has a home right now, the video is online somewhere
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<esden[m]> Another round shipped today. 🙂
<ari> nice
<ari> esden[m]: btw, would it be possible to buy more sets of probe cables? or do you maybe have a pointers where to order something like that, that would fit glasgow?
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<esden[cis]> ari: I will make the cables available in the 1BitSquared store. The issue is that I am waiting for the next round of cables to be delivered from the manufacturer, and the ones I have are allocated towards the campaign fulfillment.
<ari> esden[cis]: ok, thanks! :)
<esden[cis]> I think the cables should ship to us soon, I hope they will be here early next month.
<esden[cis]> So remind me in ~2-3weeks? I hope that is ok.
<ari> yeah, absolutely no rush
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<fishmonger[m]> I am pretty pleased with the resulting print. For being offcut light pipes just showed in there and not even polished they work pretty well.
<fishmonger[m]> * I am pretty pleased with the resulting print. For being offcut light pipes just showed in there and not even polished they work really well.
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<whitequark[cis]> ooh nice
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