USB programmable Open Source Hardware
in [FPGA]
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From: Antti.Lukats on 28 Sep 2009 02:28 On Sep 28, 1:52 am, -jg <jim.granvi...(a)gmail.com> wrote: > On Sep 28, 9:48 am, Uwe Bonnes <b...(a)elektron.ikp.physik.tu- > > darmstadt.de> wrote: > > -jg <jim.granvi...(a)gmail.com> wrote: > > > Why not FT2232H here, to "make it as good as you can," ? > > > The FT2232H costs more buck and needs more infrastructure. But I perfer it > > too... > > I like the potential for a reasonable rate continual sample, for > things like PC Frequency counter, Logic analyzer ets, as it's always > good to have a 'free instrument' or two, in any development kit, and > especially so for teaching. > { We've been getting quite good results from SoundCards, on the 'free > instrument' front, (but with obvious bandwidth ceilings) } > > -jg Jim, for those who are looking for dirt cheap usb locic and protocol analyzer FX2 chips provide a easy solution i first found this in some german forums, but later trapped onto this http://www.6-lab.com/index.php/projectlist/logicu logic-U-Plus is GENERIC FX2 board that can be configured to emulate either Locic from www.saleae.com or USBee AX Pro from www.usbee.com well, I have relation to those folks, and not promoting any such use, but well, such "solutions" are available and far more easy to use then making own logic analyzer based on FT2232H Antti
From: Antti.Lukats on 28 Sep 2009 02:35 On Sep 28, 9:28 am, "Antti.Luk...(a)googlemail.com" <antti.luk...(a)googlemail.com> wrote: > On Sep 28, 1:52 am, -jg <jim.granvi...(a)gmail.com> wrote: > > > > > On Sep 28, 9:48 am, Uwe Bonnes <b...(a)elektron.ikp.physik.tu- > > > darmstadt.de> wrote: > > > -jg <jim.granvi...(a)gmail.com> wrote: > > > > Why not FT2232H here, to "make it as good as you can," ? > > > > The FT2232H costs more buck and needs more infrastructure. But I perfer it > > > too... > > > I like the potential for a reasonable rate continual sample, for > > things like PC Frequency counter, Logic analyzer ets, as it's always > > good to have a 'free instrument' or two, in any development kit, and > > especially so for teaching. > > { We've been getting quite good results from SoundCards, on the 'free > > instrument' front, (but with obvious bandwidth ceilings) } > > > -jg > > Jim, > > for those who are looking for dirt cheap usb locic and protocol > analyzer FX2 chips provide a easy solution > > i first found this in some german forums, but later trapped onto thishttp://www.6-lab.com/index.php/projectlist/logicu > > logic-U-Plus is GENERIC FX2 board that can be configured > to emulate either Locic fromwww.saleae.com > or > USBee AX Pro fromwww.usbee.com > > well, I have relation to those folks, and not promoting > any such use, but well, such "solutions" are available > and far more easy to use then making own logic > analyzer based on FT2232H > > Antti OOOOOOOOOOOOOPS CORRECTION: I have NO relation to any of those folks, monday morning, before cofee ;) the software from saleae/usbee is licensed for free use only with the hardware purchased from the official resellers, any other use is not allowed. I'd better take a break before posting any more Antti PS there is place for anything and everyone if i say something could be done better, it doesnt mean things done otherwise are bad to the bones, or that i could them better myself, anything that is done, completed and useable is something good already no matter the techncal solutions are
From: -jg on 28 Sep 2009 05:12 On Sep 28, 6:28 pm, "Antti.Luk...(a)googlemail.com" <antti.luk...(a)googlemail.com> wrote: > On Sep 28, 1:52 am, -jg <jim.granvi...(a)gmail.com> wrote: > > > On Sep 28, 9:48 am, Uwe Bonnes <b...(a)elektron.ikp.physik.tu- > > > darmstadt.de> wrote: > > > -jg <jim.granvi...(a)gmail.com> wrote: > > > > Why not FT2232H here, to "make it as good as you can," ? > > > > The FT2232H costs more buck and needs more infrastructure. But I perfer it > > > too... > > > I like the potential for a reasonable rate continual sample, for > > things like PC Frequency counter, Logic analyzer ets, as it's always > > good to have a 'free instrument' or two, in any development kit, and > > especially so for teaching. > > { We've been getting quite good results from SoundCards, on the 'free > > instrument' front, (but with obvious bandwidth ceilings) } > > > -jg > > Jim, > > for those who are looking for dirt cheap usb locic and protocol > analyzer FX2 chips provide a easy solution > > i first found this in some german forums, but later trapped onto thishttp://www.6-lab.com/index.php/projectlist/logicu > > logic-U-Plus is GENERIC FX2 board that can be configured > to emulate either Locic fromwww.saleae.com > or > USBee AX Pro fromwww.usbee.com Those are not cheap, nor are they chips - and cannot pgm the FPGA out of the box... - as this thread is about FPGA boards, my comments were in that context. ie what can do the PGM pathway _and_ give other runtime information, almost for free. In such single unit products, the incremental chip price variation is not material. - Digikey shows the saving to be a princely $1 ;) So, give the user a choice of much faster download times, and the potential? for a free Logic/Frequency HW pathway, all for $1 more, and what would they choose ?
From: Uwe Bonnes on 28 Sep 2009 07:58 rickman <gnuarm(a)gmail.com> wrote: > On Sep 27, 12:42�pm, "Antti.Luk...(a)googlemail.com" > <antti.luk...(a)googlemail.com> wrote: > > On Sep 26, 8:39�pm, rickman <gnu...(a)gmail.com> wrote: > > > > > > I enjoy your responses they are to the bone, but valid. The right <zillions of line of senseless quote delete> Do people ever use archived news and get angry about unrelated quote meaning unrelated search hits? > Why a two layer board? I would expect any decent design to use at > least four layers just so it can have a ground/power plane for noise > reduction. Especially when you don't know what someone will be doing > with it, best is to provide a bit of overkill. I'm not interested in > saving every last penny on a development board like this. With programmable pin helping the layouter to get a planar layout, the bottom layer can be made quite a continous groundplane. ... Bye -- Uwe Bonnes bon(a)elektron.ikp.physik.tu-darmstadt.de Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt --------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
From: Antti.Lukats on 28 Sep 2009 08:23
> Do people ever use archived news and get angry about unrelated quote meaning > unrelated search hits? > > > Why a two layer board? I would expect any decent design to use at > > least four layers just so it can have a ground/power plane for noise > > reduction. Especially when you don't know what someone will be doing > > with it, best is to provide a bit of overkill. I'm not interested in > > saving every last penny on a development board like this. > > With programmable pin helping the layouter to get a planar layout, the > bottom layer can be made quite a continous groundplane. > > .. > > Bye > -- > Uwe Bonnes b...(a)elektron.ikp.physik.tu-darmstadt.de > > Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt > --------- Tel. 06151 162516 -------- Fax. 06151 164321 ---------- please complain to the GOOGLE (and saying that use something else isnt an option always, sorry... I use what is the easiest way) when replying using google news its not easy to delete the rubish as it not even seen on screen well, i see the thread is reached status where people start to complain about quoting issues, :( Antti |