gEDA-user: Split ground planes and zero ohm jumpers
The common way to track common ground planes seems to be to place a jumper between the planes so that the netlist can be sane. This requires a component to be placed on one of the outer layers of the board, which is a bit of an annoyance. Is there any other way of doing this? Maybe some kind of hacked component on an inner layer? ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Split ground planes and zero ohm jumpers
On Mon, 4 Apr 2011 23:30:21 -0700 Russell Dill ru...@asu.edu wrote: The common way to track common ground planes seems to be to place a jumper between the planes so that the netlist can be sane. This requires a component to be placed on one of the outer layers of the board, which is a bit of an annoyance. Is there any other way of doing this? Maybe some kind of hacked component on an inner layer? What I do is I place a 0Ohm resistor, and when the layout is ready, I short it with a line. This will give DRC error, but I ignore it. Levente -- Kovacs Levente leventel...@gmail.com Voice: +36705071002 ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: Bug in gnetlist?
Hi I have multi-page schematics with a number of off-page connectors (realised using the symbols input-1.sym and input-2.sym) as described in the howto: [1]http://www.geda.seul.org/wiki/geda:na_howto#what_is_the_net_attribut e_used_for I noticed that if multiple net attributes happen to be present on the same net in the schematic, then the netlist seems to treat them as completely different nets and /ignores/ any interconnections. I have posted my files here: [2]http://www.cedt.iisc.ernet.in/people/students/kabhijit/files/gEDA/ There are two pages of schematics. I have defined two 'net' attributes - one is MVDD and the other is NVDD. In addition these two are shorted. Therefore _all_ the pins in the schematic are connected to a single net. But the netlist has a listing as if there is no connection between MVDD and NVDD. I expected gnetlist to replace MVDD by NVDD, or at least flag a warning that there is something unexpected. Am I missing something here? Thanks in advance, Regards, Abhijit Kshirsagar PhD Student, Power Electronics Group, CEDT, Indian Institute of Science, Bangalore References 1. http://www.geda.seul.org/wiki/geda:na_howto#what_is_the_net_attribute_used_for 2. http://www.cedt.iisc.ernet.in/people/students/kabhijit/files/gEDA/ ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Bug in gnetlist?
2011/4/5 Abhijit Kshirsagar abhijit...@gmail.com: I have multi-page schematics with a number of off-page connectors (realised using the symbols input-1.sym and input-2.sym) as described in the howto: [1]http://www.geda.seul.org/wiki/geda:na_howto#what_is_the_net_attribut e_used_for I noticed that if multiple net attributes happen to be present on the same net in the schematic, then the netlist seems to treat them as completely different nets and /ignores/ any interconnections. I suspect your case is covered by one of the bugs below: https://bugs.launchpad.net/geda/+bug/698395 https://bugs.launchpad.net/geda/+bug/698524 https://bugs.launchpad.net/geda/+bug/698570 Two of them were recently fixed in the git HEAD, so you can try to use development version of gnetlist to check. The remaining bug is harder to fix. -- Krzysztof Kościuszkiewicz Simplicity is the ultimate sophistication -- Leonardo da Vinci ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: New mass attribute tool: gattrib_csv
On Fri, Apr 1, 2011 at 2:19 PM, Joshua Joshua at laserlinc.com wrote: Hey guys. I wrote a tool which exports and imports the properties from a project to and to a csv file. http://public.laserlinc.com/Joshua/gattrib_csv.java The following command compiles it to exe. gcj --main=gattrib_csv -o gattrib_csv gattrib_csv.java You may find that there is some effort duplication going on: http://www.gedasymbols.org/user/dj_delorie/ # sch2csv - extract part attributes to a comma separated list (open with openoffice calc) # csv2sch - merge part attributes to schematics. To use these: Well then. I hadn't seen sch2csv and csv2sch. Effort duplication granted. However without being able to run sch2csv due to missing Text/CSV_XS.pm, it would seem that sch2csv isn't able to accept a filter as to which attributes are exported and in which order. Thus so gattrib_csv does still make a contribution. gattrib_csv also correctly handles slotted components by including the position of the component in its reference when the refdes is not specific enough. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: US Distributor for Balloon Board
On 3/26/2011 8:50 PM, Patrick Doyle wrote: Hi Folks, I'm looking for a US distributor for a Balloon Board (http://www.balloonboard.org/) or it's equivalent -- perhaps one of you may have designed and sell your own equivalent. Basically, I'm looking for a standalone board with a processor (with it's associated flash SDRAM) and an FPGA. I'm not terribly picky about the FPGA -- any reasonable Xilinx or Altera device should suffice. Does anybody on this list have any recommendations? I would prefer to buy from a gEDA supporter, and it will be logistically easier if I can purchase from someplace in the US. Thanks for any pointers. --wpd Patrick, I don't see where you responded to any of the replies to your post. Did you find something that met your needs? I am considering laying out a design that would include a Freescale Kinetis device and an FPGA. I am in the US and this would be an open source design using open source tools. I haven't picked the details yet, but I have a preference for the Silicon Blue FPGAs. They only make small versions, but they are very, very low power which is my goal. I had not been planning to include external RAM, but the K60 has a DDR interface and can be included easily. I assume that if you need that much RAM it means you intend to run Linux on it. Is that right? I don't know if Linux is ported to the K60, but I expect it would not be at all difficult to do since the K60 is an ARM CM4 (CM3 + DSP and SIMD instructions). Does this sound interesting to you? I also have an interest in testing the Green Arrays GA144 multiprocessor. This device has 144 processors running at 666 MIPS each consuming less than a Watt with all running full bore. They are async processors and stop on a dime when waiting for input dropping power consumption to virtually nothing (100 nW per processor) able to resume processing at full speed in a fraction of a ns. They just need to identify a killer app and these devices will take off. The one aspect that may turn off a lot of potential users is the tiny on-chip memory, only 64 words in each processor. But external memory can be connected of course. This chip is not programmed in C, so you can do a lot more with very little memory. I think of it more like an FPGA than an MCU. A Field Programmable Processor Array, FPPA. Rick ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: US Distributor for Balloon Board
Hi Rick, I'm still collecting information. So far, the Balloon board sounds the most like what I need: a currently shipping and supported processor + FPGA board. But the currently shipping part is negotiable, as it will be at least a month or two before I can do anything at all with the board (other than gather information about it). A collaborative design effort would be fun, but again, it will be at least a month or two before I will have even the hint of a possibility of collaboratively designing anything :-) In other words... I'm still thinking. Thanks for giving me more to chew on. The GA144 sounds quite interesting for a very specific application that may be coming down the pike pretty soon, but I don't have any good killer app ideas for it. --wpd On Tue, Apr 5, 2011 at 9:47 AM, rickman gnuarm.g...@arius.com wrote: On 3/26/2011 8:50 PM, Patrick Doyle wrote: Hi Folks, I'm looking for a US distributor for a Balloon Board (http://www.balloonboard.org/) or it's equivalent -- perhaps one of you may have designed and sell your own equivalent. Basically, I'm looking for a standalone board with a processor (with it's associated flash SDRAM) and an FPGA. I'm not terribly picky about the FPGA -- any reasonable Xilinx or Altera device should suffice. Does anybody on this list have any recommendations? I would prefer to buy from a gEDA supporter, and it will be logistically easier if I can purchase from someplace in the US. Thanks for any pointers. --wpd Patrick, I don't see where you responded to any of the replies to your post. Did you find something that met your needs? I am considering laying out a design that would include a Freescale Kinetis device and an FPGA. I am in the US and this would be an open source design using open source tools. I haven't picked the details yet, but I have a preference for the Silicon Blue FPGAs. They only make small versions, but they are very, very low power which is my goal. I had not been planning to include external RAM, but the K60 has a DDR interface and can be included easily. I assume that if you need that much RAM it means you intend to run Linux on it. Is that right? I don't know if Linux is ported to the K60, but I expect it would not be at all difficult to do since the K60 is an ARM CM4 (CM3 + DSP and SIMD instructions). Does this sound interesting to you? I also have an interest in testing the Green Arrays GA144 multiprocessor. This device has 144 processors running at 666 MIPS each consuming less than a Watt with all running full bore. They are async processors and stop on a dime when waiting for input dropping power consumption to virtually nothing (100 nW per processor) able to resume processing at full speed in a fraction of a ns. They just need to identify a killer app and these devices will take off. The one aspect that may turn off a lot of potential users is the tiny on-chip memory, only 64 words in each processor. But external memory can be connected of course. This chip is not programmed in C, so you can do a lot more with very little memory. I think of it more like an FPGA than an MCU. A Field Programmable Processor Array, FPPA. Rick ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: US Distributor for Balloon Board
On 4/5/11 9:47 AM, rickman wrote: I also have an interest in testing the Green Arrays GA144 multiprocessor. This device has 144 processors running at 666 MIPS each consuming less than a Watt with all running full bore. They are async processors and stop on a dime when waiting for input dropping power consumption to virtually nothing (100 nW per processor) able to resume processing at full speed in a fraction of a ns. They just need to identify a killer app and these devices will take off. Oh wow, I hadn't heard of the GA144. It's another Chuck Moore special, and it looks REALLY spectacular. I must get my hands on one of these. Have you managed to get samples? The one aspect that may turn off a lot of potential users is the tiny on-chip memory, only 64 words in each processor. But external memory can be connected of course. This chip is not programmed in C, so you can do a lot more with very little memory. I think of it more like an FPGA than an MCU. A Field Programmable Processor Array, FPPA. Well, that just requires an adjustment to peoples' way of thinking. Far too many people who call themselves embedded systems designers these days think an embedded system is a big SBC running some variant of Windows with bloated C++ code eating dozens of megabytes of memory. Truly high-tech stuff like the GA144 simply isn't targeted at that part of the world. -Dave -- Dave McGuire Port Charlotte, FL ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Bug in gnetlist?
Thanks very much! The first two are almost exactly what I had posted, so thats resolved. In the case of the third, (https://bugs.launchpad.net/geda/+bug/698570), I was curious to see what gnetlist was doing, so I ran it on the schematics with the options -g geda (Netlist format = geda) and -v (verbose mode). In the resulting file, i see the lines: START renamed-nets DVDD_FPGA - Vcco2 END renamed-nets Which definitely means that gnetlist understands and interprets correctly the fact that the two nets are shorted and drops one name. Just that this doesn't seem to be happening correctly for multiple renamings. ~Abhijit 2011/4/5 Krzysztof Kościuszkiewicz k.kosciuszkiew...@gmail.com 2011/4/5 Abhijit Kshirsagar abhijit...@gmail.com: I have multi-page schematics with a number of off-page connectors (realised using the symbols input-1.sym and input-2.sym) as described in the howto: [1]http://www.geda.seul.org/wiki/geda:na_howto#what_is_the_net_attribut e_used_for I noticed that if multiple net attributes happen to be present on the same net in the schematic, then the netlist seems to treat them as completely different nets and /ignores/ any interconnections. I suspect your case is covered by one of the bugs below: https://bugs.launchpad.net/geda/+bug/698395 https://bugs.launchpad.net/geda/+bug/698524 https://bugs.launchpad.net/geda/+bug/698570 Two of them were recently fixed in the git HEAD, so you can try to use development version of gnetlist to check. The remaining bug is harder to fix. -- Krzysztof Kościuszkiewicz Simplicity is the ultimate sophistication -- Leonardo da Vinci ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: PCB Netlist syntax
What is the syntax for allotting a routing style to a net? I saw the syntax here: http://pcb.gpleda.org/pcb-cvs/pcb.html#Netlist-File and http://archives.seul.org/geda/dev/May-2008/msg00120.html I created the netlist using gschem2pcb and then edited it using a text editor, adding the word power just after the net GND in the netlist. The PCB log window reported no errors when I hit 'O' to optimise the rats nest, but the autorouter ignored the route style. If, instead, I use -power I get: WARNING! Pin number ending with 'R' encountered in netlist file Probably a bad netlist file format Can't find pin POWER called for in netlist. Is there a caps/no-caps requirement? Or Tab separation? P.S. Double checked that the correct netlist is getting loaded, and I Do have a route style called 'Power' with fatter trace widths. Thanks, ~Abhijit ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: PCB Netlist syntax
The syntax allows a net style there, but nothing in gschem produces it so nothing in pcb uses it. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: PCB Netlist syntax
I managed to edit the netlist file manually (in gedit) and added the word 'Power'. Seems it is case sensitive _and_ tab sensitive. To summarize, the syntax of the style allocation should be: netname SPACE style_name TAB pin pin pin where stylename is Case sensitive. e.g. Power worked; power did not... Yes it would be good if gnetlist could read some attribute like routestyle or something... But adding it manually isn't such a hard job at least for small boards... Thanks again! ~Abhijit On Tue, Apr 5, 2011 at 22:39, DJ Delorie d...@delorie.com wrote: The syntax allows a net style there, but nothing in gschem produces it so nothing in pcb uses it. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: PCB Netlist syntax
I created the netlist using gschem2pcb and then edited it using a text editor, Did the text editor change the end of line format? I've seen that error when editing the netlist with Windows Text Editors, or text editors that adapt. If you use EMACS on Windows make sure it is a unix format file and not a DOS style file. If, instead, I use -power I get: WARNING! Pin number ending with 'R' encountered in netlist file Probably a bad netlist file format Can't find pin POWER called for in netlist. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: PCB Netlist syntax
I used gedit. I'm working in Ubuntu. ~Abhijit On Tue, Apr 5, 2011 at 22:48, Bob Paddock graceindustr...@gmail.com wrote: I created the netlist using gschem2pcb and then edited it using a text editor, Did the text editor change the end of line format? I've seen that error when editing the netlist with Windows Text Editors, or text editors that adapt. If you use EMACS on Windows make sure it is a unix format file and not a DOS style file. If, instead, I use -power I get: WARNING! Pin number ending with 'R' encountered in netlist file Probably a bad netlist file format Can't find pin POWER called for in netlist. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Split ground planes and zero ohm jumpers
On Tue, Apr 5, 2011 at 1:53 AM, Kovacs Levente leventel...@gmail.com wrote: On Mon, 4 Apr 2011 23:30:21 -0700 Russell Dill ru...@asu.edu wrote: The common way to track common ground planes seems to be to place a jumper between the planes so that the netlist can be sane. This requires a component to be placed on one of the outer layers of the board, which is a bit of an annoyance. Is there any other way of doing this? Maybe some kind of hacked component on an inner layer? What I do is I place a 0Ohm resistor, and when the layout is ready, I short it with a line. This will give DRC error, but I ignore it. Perhaps I'll go with a solder blob jumper. A drawbridge component in PCB that is just a special type of trace would be really nice. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Split ground planes and zero ohm jumpers
On Tue, 5 Apr 2011 13:11:25 -0700 Russell Dill ru...@asu.edu wrote: Perhaps I'll go with a solder blob jumper. A drawbridge component in PCB that is just a special type of trace would be really nice. Yeah. I miss the concept of the star point. -- Levente Kovacs http://levente.logonex.eu ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Split ground planes and zero ohm jumpers
The common way to track common ground planes seems to be to place a jumper between the planes so that the netlist can be sane. This requires a component to be placed on one of the outer layers of the board, which is a bit of an annoyance. Is there any other way of doing this? Maybe some kind of hacked component on an inner layer? What I do is I place a 0Ohm resistor, and when the layout is ready, I short it with a line. This will give DRC error, but I ignore it. The library department at my company defined a special component for that purpose. We have a 2, 3 or 4 Star Symbol for that. To that symbol a special footprint will be attached where the pins are connected. The component is a smd device and I can place it in the layout at the top or bottom side. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: zview/ngscope
Andrzej wrote: and that I don't consider ngscope yet another waveform viewer. I didn't want to discourage anybody from anything. It was just the feeling that the bottle neck with simulation in the context of geda is somewhere else. Specifically, the suite misses a way for fast turnaround of schematic modification, simulation and display. The second and perhaps even more important bottle neck are of course the models, or rather the lack of them. ---)kaimartin(--- -- Kai-Martin Knaak Email: k...@familieknaak.de Öffentlicher PGP-Schlüssel: http://pool.sks-keyservers.net:11371/pks/lookup?search=0x6C0B9F53 ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: zview/ngscope
I just want to throw my opinion out there. I have been using geda (gschem and pcb) for years and I have yet to find a satisfactory waveform viewer, simulation gui, and netlister. Kudos to someone who wants try to make a legitimate waveform viewer, the open source EDA community needs one. I for one use gnuplot but would like something much more interactive than that in the future. On Tue, Apr 5, 2011 at 3:57 PM, Kai-Martin Knaak k...@lilalaser.de wrote: Andrzej wrote: and that I don't consider ngscope yet another waveform viewer. I didn't want to discourage anybody from anything. It was just the feeling that the bottle neck with simulation in the context of geda is somewhere else. Specifically, the suite misses a way for fast turnaround of schematic modification, simulation and display. The second and perhaps even more important bottle neck are of course the models, or rather the lack of them. ---)kaimartin(--- -- Kai-Martin Knaak Email: k...@familieknaak.de Öffentlicher PGP-Schlüssel: http://pool.sks-keyservers.net:11371/pks/lookup?search=0x6C0B9F53 ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: New mass attribute tool: gattrib_csv
Joshua wrote: gattrib_csv also correctly handles slotted components by including the position of the component in its reference when the refdes is not specific enough. Wouldn't it be desirable to somehow treat slotted and split symbols as one entity? E.g. there should be just one footprint attribute for all of them. ---)kaimartin(--- -- Kai-Martin Knaak Email: k...@familieknaak.de Öffentlicher PGP-Schlüssel: http://pool.sks-keyservers.net:11371/pks/lookup?search=0x6C0B9F53 ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: New mass attribute tool: gattrib_csv
gattrib_csv also correctly handles slotted components by including the position of the component in its reference when the refdes is not specific enough. Wouldn't it be desirable to somehow treat slotted and split symbols as one entity? E.g. there should be just one footprint attribute for all of them. For the record, my tool *also* uses the X,Y,file location information to uniquely define a symbol, but that's so that you can *change* the refdes too, or slot, or whatever. The only problems I've encountered with footprints on split/slotted symbols is, if you are missing a footprint= on one of them, it's unspecified whether you end up with a footprint *at all* or not. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: Small change to get pcb to build on my FreeBSD machine
On my FreeBSD laptop I've got tk-8.5.8_1 installed, and it provides wish8.5. I made the following change to configure.ac to get it to work: diff --git a/configure.ac b/configure.ac index 87814cd..ab6986f 100644 --- a/configure.ac +++ b/configure.ac @@ -534,7 +534,7 @@ else fi -AC_PATH_PROGS(WISH, wish wish83 wish8.3 wish80 wish8.0 cygwish83 cygwish80,[none]) +AC_PATH_PROGS(WISH, wish wish85 wish8.5 wish83 wish8.3 wish80 wish8.0 cygwish83 cygwish80,[none]) if test X$WISH = Xnone ; then AC_MSG_ERROR([Did not find the wish executible. You need to make sure that tcl is installed on your system and that wish is in your path]) -Ed ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Small change to get pcb to build on my FreeBSD machine
Thanks, pushed. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
