2011-10-19 01:32 (sw for antenna simulation and R&D) rarely anything. Basicaly it's still not possible to *accurately* compute antennae 2011-10-19 01:33 there are a few algos for well known models, lika yagi 2011-10-19 01:33 like* 2011-10-19 01:33 of course for parabolic it mostly should work as well 2011-10-19 01:34 but calculate the gain in dB of a random wire bent to some shape of your liking? nope 2011-10-19 01:44 oh, there are simulators. but they're kinda hostile ... (or non-open) 2011-10-19 01:47 yes, and not really accurate enough. AFAIK all industry tests with real models, as they yield different results than the simulators 2011-10-19 01:50 seems it's a variation of the 3+ planets problem. Really hard and expensive to calculate, and never exact 2011-10-19 01:51 special class of strange attractors 2011-10-19 01:51 maxwell's demon :) 2011-10-19 01:52 umm 2011-10-19 01:52 wasn't the maxwell daemon only to know, but not to extrapolate? 2011-10-19 01:53 maybe he has other skills :) 2011-10-19 01:54 oooh I first got it right, then mixed up maxwell with laplace 2011-10-19 01:55 can't see how maxwell's daemon is related 2011-10-19 01:57 btw I reinvented maxwell's daemon in school when I was 14 years old :-D. My physics teacher wasn't completely convinced I never before heard of maxwell's daemon when I asked him about where the energy goes when just pouring warm water into cold water, and if it was possible to "unmix" them again 2011-10-19 02:01 heh ;-) and at 15, he flunked you when you proved the existence of "dark matter", right ? :) 2011-10-19 02:04 and then, at 16, they made you see a therapist when you explained that there are nearly weightless particles, that almost never interact with matter, that spontaneously change into other, similar, particles and back, and that travel at the speed of light or slightly faster 2011-10-19 02:20 nah, none of that 2011-10-19 02:20 btw I'm not convinced about existence of dark matter even today 2011-10-19 02:22 at least that stuff must be really strange, as it's obviously not forming planets or stars, despite allegedly obeying law of gravity 2011-10-19 02:22 yeah, it's one of the more dubious concepts. has that strong smell of aether on it :) 2011-10-19 02:22 maybe dark stars :) 2011-10-19 03:17 [commit] Xiangfu Liu: nanonote-files: update feeds.conf for next release (master) http://qi-hw.com/p/openwrt-packages/fe24c6b 2011-10-19 07:43 [commit] Xiangfu Liu: makfa: add makfa.dump to files. not generate every build (master) http://qi-hw.com/p/openwrt-packages/bf77201 2011-10-19 08:16 viric: hey, that sounds great. What kind of functionality for offrss do you think about? 2011-10-19 08:17 kyak: something like getting a list of only-titles, for feeds in a group 2011-10-19 08:18 To handle so much data as you need... there should be some code 'removing posts' there 2011-10-19 08:18 that would be usefull for some feeds, where only title matters 2011-10-19 08:19 kyak: there are some people publishing almost only title and hyperlink 2011-10-19 08:19 yes, there are :) 2011-10-19 08:19 kyak: for your use case, you could use some 'rss2title URL | grep ...'  :) 2011-10-19 08:21 that's basically what i did before, curl URL | grep | sed & etc 2011-10-19 08:21 and than i have the download magically in rtorrent 2011-10-19 08:22 from my opinion, the best new feaure would be a "mark all as read" (for a group or for a feed) - but i don't know how hard is it to implement it 2011-10-19 08:31 kyak: easy easy 2011-10-19 08:38 viric: well, when you need testing, just let me know ::) 2011-10-19 08:46 ok :) 2011-10-19 14:37 wpwrak: remember that my LVDS thingy? 2011-10-19 14:37 IT WORKS!! 2011-10-19 14:37 a console with a penguin is displayed at least :D 2011-10-19 14:40 congratulations ! :-) that was quite a battle 2011-10-19 14:59 yeah 2011-10-19 14:59 but now I can make happier quite a few people 2011-10-19 14:59 I already have a second order :D 2011-10-19 15:01 (a battle) IMO, a pretty regular debugging routine, isn't it? 2011-10-19 15:01 I don't think that even atben or of course the ben itself were any easier 2011-10-19 15:10 well, they were different :) 2011-10-19 15:11 the basic stuff worked quickly. but getting the RF right was a little harder 2011-10-19 16:03 The build was successfull, see images here: http://fidelio.qi-hardware.com/~xiangfu/compile-log/openwrt-xburst.full_system-10172011-2340/ 2011-10-19 16:18 larsc: do you which of the USB Gadget Drivers would work for Ben? I tried a few so far, none of them works (except for USB_ETH) 2011-10-19 16:20 wpwrak: http://rghost.ru/26276911/image.png :) 2011-10-19 16:21 kyak: i think i only tested USB_ETH so far 2011-10-19 16:23 kyak: try the CDC-ACM 2011-10-19 16:23 it may work 2011-10-19 16:23 whitequark: that i tried, it doesn't work 2011-10-19 16:23 it works on 4750l, and it has the same usb gadget as 4740 2011-10-19 16:23 hmmm 2011-10-19 16:23 strange 2011-10-19 16:24 whitequark: the composite driver or..? 2011-10-19 16:25 kyak: the composite driver? 2011-10-19 16:26 larsc: i see.. i thought USB_CDC_COMPOSITE would work (CDC ECM for Linux and CDC ACM for Windows, which doesn't have ECM driver) 2011-10-19 16:26 whitequark: i'm trying now the USB_G_SERIAL 2011-10-19 16:28 whitequark: nice ! 2011-10-19 16:28 kyak: IIRC 4740 usb gadget does not have enough descriptors or whatever for ECM+ACM tow ork 2011-10-19 16:28 *to work 2011-10-19 16:28 wpwrak: thanks 2011-10-19 16:43 kyak: are you getting any error messages in dmesg? 2011-10-19 16:44 no, it's quite at all 2011-10-19 16:44 like i'm not plugging anything 2011-10-19 16:45 damn, kernel_menuconfig is so broken, i can't configure the kernel correctly.. 2011-10-19 17:13 whitequark: yeah, USB_G_SERIAL works fine (at least on Linux, still doesn't work for Windows) 2011-10-19 17:14 but this config is not so interesting anyway.. 2011-10-19 17:25 kyak: as I've said, when I've looked at it, it turned out that the UDC does not have sufficient resources to run the combined configuration 2011-10-19 17:25 unless you'll hack it to do so, of course 2011-10-19 17:35 that's pretty strange though because i want it to run one configration a time 2011-10-19 17:35 not both configurations concurrently 2011-10-19 17:36 kyak: then, you should not use a combined one 2011-10-19 17:36 just compile both ECM and ACM  as modules and load the one which you want to use currently 2011-10-19 17:36 it's proven to work 2011-10-19 17:37 or ETH, that works with any gadget 2011-10-19 17:39 whitequark: yes, compiling both as modules makes sense.. 2011-10-19 17:40 it's the way it works 2011-10-19 17:40 whitequark: are you saying that ETH supports ACM, too? 2011-10-19 17:46    2011-10-19 17:47 kyak: nope, it doesnt 2011-10-19 17:47 they are different gadgets 2011-10-19 17:47 ~/. 2011-10-19 17:47 darn. 2011-10-19 17:47 sorry, crappy WiFi 2011-10-19 17:56 whitequark: ok, thnkas 2011-10-19 18:05 Hi Kristianpaul 2011-10-19 18:16 Artyom: hello! 2011-10-19 18:17 how is your work with gps? 2011-10-19 18:17 signed problem solved, but i have some problems when reading memory :/ 2011-10-19 18:17 my fault.. 2011-10-19 18:18 I'm working on solving, actually you are using a DCM in your board isnt? 2011-10-19 18:19 The problem is that namuru core clock is 8Mhz and the SoC clock is 80Mhz 2011-10-19 18:20 yes, I use DCM to generate 80MHz clock for FPGA from 16MHz clock from my front-end 2011-10-19 18:21 yes, well i'm working on solve that, i just found a solution but is vhdl so i need port it 2011-10-19 18:22 so it should avoid cross clock domain issues using a fifo 2011-10-19 18:22 btw i was checking your code, so i think can be easy ported later, also i'll re-use that mprintf function :) 2011-10-19 18:22 So far, thats my status 2011-10-19 18:24 How is yours?  what about your students projects?? all related with gnss-sdr? :-) 2011-10-19 18:24 mprintf is not mine ;) I've found it in internet ;) 2011-10-19 18:26 I switch to some other tasks related with glonass. especcially with the new cdma signal. 2011-10-19 18:26 ah sure, yes :) 2011-10-19 18:27 and i also spend some time on planning future front-end. I want to make dual frequency glonass/gps front-end 2011-10-19 18:27 oh 2011-10-19 18:29 students are rather lazy and unpredictable ;) Actually I was the same... 2011-10-19 18:30 What about processing? still want to use the usb for transfer data to pc or  want do soemthing in same board with arm+ fgpa¿ 2011-10-19 18:30 laaaazy 2011-10-19 18:32 I want to make something universal: the device should be able to transmit data to PC through USB 2.0 and to process data autonomously 2011-10-19 18:33 thats fair 2011-10-19 18:34 And I want to split analogue and digital parts. Each part should be made on a separate pcb 2011-10-19 18:35 that will be great, also will allow re-use the anloag part in other projects ;-) 2011-10-19 18:37 But now I'm mainly busy with software processing... And I have to prepare couple of articles... 2011-10-19 18:37 Artyom: what you think about i run namuru at same clock of my soc, and uses dcm to to something inverse to decime with the coming I/Q signals?? 2011-10-19 18:38 What is the quartz-generator that you want to use? 2011-10-19 18:39 sorry i don understand 2011-10-19 18:39 dont* 2011-10-19 18:39 GPS devices usually use TCXO or even OCXO. 2011-10-19 18:39 ah, you mean the clock for the SoC? 2011-10-19 18:39 I mean what kind of clock do you want ot use? 2011-10-19 18:40 for namuru i want to use the same clock as the main soc 2011-10-19 18:41 yes, my front end have own TCXO 2011-10-19 18:42 So as I understand you want to use mylkimist clock for your gps front-end? 2011-10-19 18:42 but the problem is that data is sampled at 8mhz, how i can still read it if my system (and namuru)uns at 80Mhz 2011-10-19 18:42 may be 2011-10-19 18:43 or you want to use gps front-end clock as the main clock? 2011-10-19 18:44 I wish i could, but the exp connector i have dont have pins for mail clock signals afaik 2011-10-19 18:45 thats why i'm dealing with two clocks and crossing its domains 2011-10-19 18:45 So your problem is that front-end and mylkimist use different clocks? 2011-10-19 18:45 yeap 2011-10-19 18:46 Once again 2011-10-19 18:46 Can you take front-end clock and use it in mylkimist? 2011-10-19 18:49 i could try yes, hoping synthesis will pass trought 2011-10-19 18:49 right now i'm suing that front-end clock in a slave core (namuru) of the mylkimist 2011-10-19 18:50 but not in the whole soc 2011-10-19 18:50 you can use DCM in FPGA to multiply front-end clock. Like it's done in my example 2011-10-19 18:51 yes i think could try at least 2011-10-19 18:52 sorry... how you do it now? 2011-10-19 18:53 i can change some pin asgiments in the  .ucf files plus modify a bit the dcm milkymist already uses 2011-10-19 18:57 right now namuru is a slave core in the milkymist soc, it uses clock from front-end and there is a no very good clock domain crissing "bridge" that is giving me problems :/ 2011-10-19 18:57 i think thast was you asked for, right? 2011-10-19 18:57 yes 2011-10-19 18:59 I think the simplest way is to use front-end clock for everything... 2011-10-19 18:59 Sure, i do think same, actually in the end i will still need the milkymist cpu for the aquisition and tracking 2011-10-19 19:00 so that make sense... 2011-10-19 19:00 I could try that o the milkymist one board or implement a small soc in other board i have 2011-10-19 19:01 how much ram do you need for acquistion and tracking algortym only? 2011-10-19 19:03 that's a good question ;) 2011-10-19 19:04 How can I measure it? 2011-10-19 19:05 i guess srtating by the size of your osgps 2011-10-19 19:05 binary 2011-10-19 19:06 i will check it tomorow 2011-10-19 19:07 may wpwrak knows how stimate amount of ram a c program will need. 2011-10-19 19:07 btw is it difficult to implement in fpga a cpu+other? Never done it before... 2011-10-19 19:08 no at all 2011-10-19 19:09 well you'll hit this clock domains issues, but always there is a workaroudn :) 2011-10-19 19:09 you know milkymist one already, isnt? cpu is mico32 from alttice 2011-10-19 19:10 s/alttice/lattice 2011-10-19 19:10 yes, i've read a little about it. btw I thoought that mico32 can only be used with lattice fpga's... 2011-10-19 19:11 of course is not:) i tought same then foudn milkymist project a year and half from now :) 2011-10-19 19:12 there is people i  cern i read at #milkymist using mico32 in altera fpga's so thats good too 2011-10-19 19:12 and there are problems with licence and etc? 2011-10-19 19:12 *no problems 2011-10-19 19:12 zero, there was a minor missing clarification in mico32 license but that was fixed in last release 2011-10-19 19:13 as we stay away from mips and arm implementation in fpga, all is okay so far :) 2011-10-19 19:15 and what tools are used to compile programs? And how everything is working? ;) Is there any tutorial in the web? 2011-10-19 19:15 mico32 is supported by gcc 2011-10-19 19:15 there is also a rtems port 2011-10-19 19:16 wich curerntly works as the base software in the milkymist one first market aplication wich is video synthesis 2011-10-19 19:16 Here there are some presentations 2011-10-19 19:17 http://lekernel.net/presentations/ 2011-10-19 19:17 here a good tutorial http://lekernel.net/blog/2011/08/intervention-materiel-libre-et-milkymist-au-master-i2l/ 2011-10-19 19:18 you can skip french :) 2011-10-19 19:18 http://lekernel.net/presentations/masteri2l/conf/mm_i2l.pdf 2011-10-19 19:19 last question: what is the minimum hw requirements to implement mico32 in FPGA? 2011-10-19 19:19 also you are invented you join #milkymist at any time 2011-10-19 19:19 this is nice slide too http://lekernel.net/presentations/masteri2l/conf/mm_i2l.pdf 2011-10-19 19:20 sorry this http://lekernel.net/presentations/masteri2l/tp/mmtp_i2l.pdf 2011-10-19 19:21 thanks for links :) 2011-10-19 19:21 let me find requirements in LE 2011-10-19 19:24 btw here is a small port https://github.com/fallen/milkymist-avnet 2011-10-19 19:25 prety basic just lm32, uart sram and vga 2011-10-19 19:27 Artyom: http://paste.debian.net/138098/ 2011-10-19 19:28 Is around 2500 LE for spartan6, i still looking to confirm 2011-10-19 19:29 so is pretty small i think 2011-10-19 19:30 yes, I should test it ;) 2011-10-19 19:31 about if it works, well check some videos http://www.youtube.com/user/xiangfuliu 2011-10-19 19:32 but, everything work for the VJ app, and still somw work to do for getting linux run better on it (missing drivers) 2011-10-19 19:33 and of course best usb stack and support for it 2011-10-19 19:35 ah, just in case http://en.wikipedia.org/wiki/Milkymist 2011-10-19 19:39 the idea to use only one fpga without additional cpu is attractive. The only thing that terrifies me is debugging 2011-10-19 19:40 there is a gdb support http://milkymist.org/wiki/index.php?title=Using_GDB_in-system_debugger 2011-10-19 19:41 jtag is WIP, you may want ask mwalle at #milkymist for mode detail 2011-10-19 19:41 i personally use serial port and bios for debuging :) 2011-10-19 19:42 i still on the printf and led blink era :) 2011-10-19 19:42 s/mode/more 2011-10-19 19:42 which is not a bad approach 2011-10-19 19:43 In my experience debuggers help only find certain bugs quickly, mostly doing a post mortem analysis of some kind of memory dump 2011-10-19 19:46 also there is qemu port, i'm not sure but i think is a valid way to debug software once you learn how customize the port :) 2011-10-19 19:48 you'll then need to write both software and port updates to be compatible with the real "hard"ware 2011-10-19 19:48 compared to only the software 2011-10-19 19:49 you write hardware you can trust more ;) 2011-10-19 19:51 kristianpaul: hm? 2011-10-19 19:52 whitequark: in qemu 2011-10-19 19:53 simulate hardware behavior at register layer, etc.. i guess 2011-10-19 19:55 kristianpaul: well, it's easier to do the same error in qemu & sw layer 2011-10-19 19:56 just because you write both 2011-10-19 19:56 and then you'll think for a week why it does not work on the real thing 2011-10-19 20:02 and what is qemu? ;) 2011-10-19 20:03 Is a computer emulator like propietary equivalents, vmware virtual pc 2011-10-19 20:04 Kristianpaul thanks for all the information. Very useful for me :) 2011-10-19 20:05 :-) 2011-10-19 20:06 it'm time to sleep for me... bye :) 2011-10-19 20:07 bye 2011-10-19 23:11 I've been playing around with the accelerated port of MPlayer to the Ben. I can get the video, but no the audio. 2011-10-19 23:11 s/no/not