| azonenberg | lekernel, kristianpaul: http://siliconexposed.blogspot.com/2012/07/bga-process-notes.html | 00:21 |
|---|---|---|
| azonenberg | This is the same process I use with FT256 package | 00:22 |
| azonenberg | havent tried on FG484 but i expect it to work | 00:22 |
| kristianpaul | Thanks ! | 00:25 |
| kristianpaul | Do you concern about transition times when changing owen temperature? | 00:27 |
| kristianpaul | seems dont :) | 00:28 |
| kristianpaul | gotcha, visual inspection is fundamental | 00:29 |
| azonenberg | kristianpaul: yeah, its all human-in-the-loop feedback | 00:33 |
| azonenberg | not scalable to mass production but requires very little fancy equipment | 00:33 |
| azonenberg | i do have the capabilities to make a real profile controller | 00:34 |
| azonenberg | building one is on the short-term TODO list | 00:34 |
| azonenberg | its going to be ethernet enabled | 00:34 |
| azonenberg | so i can put a board in there | 00:34 |
| azonenberg | then go back to my desk and dial in a profile | 00:34 |
| azonenberg | and it'll beep when its done | 00:34 |
| kristianpaul | is more like an OpenCV PID | 00:35 |
| kristianpaul | if you think about infrared.. | 00:35 |
| azonenberg | Lol well the real one is going to be based on a thermocouple and a relay | 00:35 |
| azonenberg | and some kind of closed-loop feedback loop | 00:35 |
| Jia | lekernel: may you tell me how did you use clang&binutils? I mean, how could you make clang calling as&ld? | 01:04 |
| kristianpaul | Jia, i tried once from here https://raw.github.com/milkymist/milkymist-ng/master/README | 01:15 |
| kristianpaul | if you mean for lm32... | 01:15 |
| Jia | yeah, lm32, and, your help is awesome | 01:18 |
| Jia | kristianpaul: cmake ..; make; make install is there anything like --prefix= ? | 01:48 |
| kristianpaul | should be, but dont find it in the CMakeLists.txt | 02:00 |
| kristianpaul | last time i installed clang was using with autotools :) | 02:01 |
| kristianpaul | lekernel: fake dma? :-) | 02:17 |
| kristianpaul | i tought imagine you said not using dma anymore?.. | 02:17 |
| Jia | http://paste.ubuntu.com/1070695/ build error | 04:47 |
| lekernel | azonenberg: nice | 07:35 |
| lekernel | Jia: I modified clang | 07:35 |
| lekernel | see the last commits in git | 07:35 |
| lekernel | I don't know about your build error ... works for me... are you using clang/llvm from the milkymist github? | 07:36 |
| Jia | lekernel: I'll read your code when I get home:) | 10:24 |
| Action: Jia are confused about the lm32-gcc bug | 10:25 | |
| kristianpaul | lekernel: had you used amber? | 13:55 |
| Jia | lekernel: your last commit is "Mico32 -> LM32", may you give me more detils? | 15:20 |
| lekernel | Jia: there are others. this one is just to match the cpu name from binutils. | 18:21 |
| lekernel | kristianpaul: no | 18:21 |
| lekernel | what's Amber? | 18:21 |
| kristianpaul | check opencores | 18:39 |
| larsc | amba? | 18:46 |
| kristianpaul | free of arm patents they claim so far it called my antetion | 18:48 |
| kristianpaul | afaik no mmu | 18:49 |
| azonenberg | kristianpaul: open source ARM core? | 20:08 |
| azonenberg | i'm sticking to mips since its a nice old architecture | 20:08 |
| azonenberg | all patents on mips1 have long since expired | 20:08 |
| kristianpaul | azonenberg: kinda yes, old arch same as your mips core | 20:09 |
| azonenberg | Well yeah, all the current ones are patented up the wazoo | 20:10 |
| wpwrak | kristianpaul: 40 MHz on a Spartan 6 45T ... | 20:26 |
| wpwrak | kristianpaul: (page 45 of the PDF) 80 MHz on a virtex | 20:27 |
| azonenberg | wpwrak: 40 MHz on an ARM core on s6? | 20:44 |
| azonenberg | even my MIPS hits 80, do they have significantly better performance per clock? | 20:44 |
| azonenberg | half the clock rate would need a much more efficient architecture to be competitive | 20:44 |
| kristianpaul | wpwrak: need to verify that without the ddr3 controller from xilinx | 20:46 |
| lekernel | azonenberg: can you deposit titanium films (on a KTN crystal)? | 20:58 |
| azonenberg | In house, or do i hav access to it? | 21:00 |
| azonenberg | In house the only film coating i can do is spin coating, i plan to build a sputtering setup but don't have the parts yet | 21:00 |
| azonenberg | i can however do evaporation on campus | 21:00 |
| wpwrak | azonenberg: they only compare it with itself. so no idea how it compares with other cores in real life. 1.0 MIPS/MHz suggests they're not ~2x faster than the rest of the pack (which they'd need to make up for the low clock speed) | 21:00 |
| lekernel | :) | 21:00 |
| lekernel | including titanium? | 21:00 |
| azonenberg | Let me look up the temps | 21:01 |
| azonenberg | I've done copper (melts 1084C boils 2562C) | 21:01 |
| azonenberg | titanium is a little higher (1668 and 3287) | 21:01 |
| azonenberg | i've also done Cr (1907, 2671) | 21:02 |
| azonenberg | and while i have not personally other people use the tool for gold (1064, 2856) | 21:02 |
| lekernel | I'm trying to build a laser scanner/projector out of this https://www.ntt-review.jp/archive/ntttechnical.php?contents=ntr200709sp2.html | 21:02 |
| azonenberg | So it should be possible to get hot enough | 21:02 |
| lekernel | after reading up, it's a little more complicated than what I thought | 21:03 |
| lekernel | first those KTN crystals are expensive as hell | 21:03 |
| azonenberg | The tool cannot get hot enough to do Pt (1768, 3285) | 21:03 |
| azonenberg | 3825* | 21:03 |
| azonenberg | vapor pressure is too low | 21:03 |
| azonenberg | and hmm... | 21:03 |
| lekernel | then, I read mentions of the crystal lattice orientation, but they are contradictory. so I should actually find a way to make failures less expensive. I know a crystal processing workshop in Berlin, maybe I'll order a boule and process it locally | 21:04 |
| azonenberg | lol nice | 21:04 |
| azonenberg | wpwrak: 1.0 MIPS/MHz is comparable to my architecture | 21:05 |
| azonenberg | maybe eve na little worse if they're talking DMIPS | 21:05 |
| azonenberg | and i clock twice as fast | 21:05 |
| azonenberg | no experience with LM32 but i'v eheard its comparable to a hair faster than mine | 21:05 |
| lekernel | and finally, the electrodes. seems you need more than just an electric field - you need an ohmic junction to inject some electrons into the crystal. and the way to do that is to deposit titanium on a polished face. | 21:05 |
| azonenberg | I see | 21:06 |
| azonenberg | well, sputtering it shouldnt be too difficult | 21:06 |
| lekernel | so, except those three "little" problems, it seems like a cool technology :-) | 21:06 |
| azonenberg | i havent built a sputtering system yet, its the third on my TODO list | 21:06 |
| azonenberg | the first two being a better spin coater and a 2-inch contact mask aligner | 21:06 |
| mumptai | a DIY foundry? | 21:07 |
| azonenberg | mumptai: #homecmos | 21:07 |
| azonenberg | its coming along slow since i'm doing it part time while in school | 21:07 |
| azonenberg | but it is moving | 21:07 |
| lekernel | azonenberg: so, titanium sputtering sounds like something you would be capable of doing? | 21:08 |
| azonenberg | Am currently capable of, no. Will be at some point, yes | 21:08 |
| mumptai | cool | 21:08 |
| azonenberg | how long it'll take depends on a lot of factors | 21:08 |
| lekernel | well, using tools on the campus. get it done, no matter how ;-) | 21:09 |
| azonenberg | If i can evaporate it, i can do it easily | 21:09 |
| lekernel | induction heating should be possible, no? | 21:09 |
| azonenberg | evaporation is done with a tungsten filament | 21:09 |
| lekernel | ah, I see... old school | 21:10 |
| azonenberg | the hard part is getting the necessary vacuum | 21:10 |
| azonenberg | 1E-6 torr range | 21:10 |
| lekernel | does it really need to be that perfect? | 21:10 |
| azonenberg | Yes | 21:10 |
| azonenberg | Sputtering can be done much hgiher | 21:10 |
| lekernel | or else? | 21:10 |
| azonenberg | 1E-3 to 1E-2 | 21:10 |
| azonenberg | You get oxidation etc | 21:11 |
| azonenberg | sputtering is done with an inert gas plasma at low temperature | 21:11 |
| wpwrak | azonenberg: (MIPS) yes, DMIPS. so it sounds like a nice achievement in terms of proof of concept. but it doesn't quite feel as if they had just obsoleted what we have. | 21:41 |
| --- Tue Jul 3 2012 | 00:00 | |
Generated by irclog2html.py 2.9.2 by Marius Gedminas - find it at mg.pov.lt!