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| From: | "Ouabache Designworks (z3qmtr45 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com> |
| Date: | Wed, 3 Aug 2016 09:19:34 -0700 |
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--001a11444200029e7805392d339e Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Wed, Aug 3, 2016 at 8:05 AM, John Doty <jpd AT noqsi DOT com> wrote: > > On Aug 3, 2016, at 3:50 AM, Svenn Are Bjerkem ( > svenn DOT bjerkem AT googlemail DOT com) [via geda-user AT delorie DOT com] < > geda-user AT delorie DOT com> wrote: > > > On 2 August 2016 at 23:02, John Doty <jpd AT noqsi DOT com> wrote: > >> The way I do it is to have a project symbol directory. I copy the > necessary > >> symbols from libraries into there. It=E2=80=99s safer to keep speciali= zed > symbols > >> bundled with the project anyway. Libraries get revised. > > > > As an example, a "reuse" project. New design using two legacy modules > > which are space-proven but have never been used in the same project > > before. The modules are created by two separate designers, both who > > are not you. > > > > mydesign/sym/lib_eth/decoder-1.sym > > mydesign/sym/lib_uart/decoder-1.sym > > > > How to solve without renaming? > > Why not rename? If you constrain the solution unnecessarily, you just win= d > up with complexity. > > I do import subcircuits from previous projects occasionally, and I run > into this, rarely. I don=E2=80=99t see any reason that one couldn=E2=80= =99t write a utility > to manage this, but it=E2=80=99s not worth the effort to me. These rare c= ases are > easily managed manually. > > In any case, this is most definitely not the responsibility of the > schematic editor in a well-factored EDA toolkit. > > This is the difference between a small data environment like PCB entry and big data like a half billion gate asic. What you see as a rare event is now a frequent and almost expected occurrence. Doing anything manually is a huge risk in any asic design. You automate everything or else you will be buried under a tsunami of code. What happens if you bring in code that needs a fix that you simply change it yourself? Five years later a new team is formed to design the follow on product to your current design. They will start with your chip design and then add ,delete or modify code for the new product. They will download the latest versions of all your modules from their sources. Somebody on the new team will need to go in and exactly duplicate the work that you did on that module. Did you leave enough documentation that they know what needs to be done? As your designs grow you have to formalize and document everything to a much greater extent than you do now. John Eaton --001a11444200029e7805392d339e Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><div class=3D"gmail_quo= te">On Wed, Aug 3, 2016 at 8:05 AM, John Doty <span dir=3D"ltr"><<a href= =3D"mailto:jpd AT noqsi DOT com" target=3D"_blank">jpd AT noqsi DOT com</a>></span> wr= ote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border= -left:1px #ccc solid;padding-left:1ex"><span class=3D""><br> On Aug 3, 2016, at 3:50 AM, Svenn Are Bjerkem (<a href=3D"mailto:svenn.bjer= kem AT googlemail DOT com">svenn DOT bjerkem AT googlemail DOT com</a>) [via <a href=3D"mailt= o:geda-user AT delorie DOT com">geda-user AT delorie DOT com</a>] <<a href=3D"mailto:g= eda-user AT delorie DOT com">geda-user AT delorie DOT com</a>> wrote:<br> <br> > On 2 August 2016 at 23:02, John Doty <<a href=3D"mailto:jpd AT noqsi DOT c= om">jpd AT noqsi DOT com</a>> wrote:<br> >> The way I do it is to have a project symbol directory. I copy the = necessary<br> >> symbols from libraries into there. It=E2=80=99s safer to keep spec= ialized symbols<br> >> bundled with the project anyway. Libraries get revised.<br> ><br> > As an example, a "reuse" project. New design using two legac= y modules<br> > which are space-proven but have never been used in the same project<br= > > before. The modules are created by two separate designers, both who<br= > > are not you.<br> ><br> > mydesign/sym/lib_eth/decoder-1.sym<br> > mydesign/sym/lib_uart/decoder-1.sym<br> ><br> > How to solve without renaming?<br> <br> </span>Why not rename? If you constrain the solution unnecessarily, you jus= t wind up with complexity.<br> <br> I do import subcircuits from previous projects occasionally, and I run into= this, rarely. I don=E2=80=99t see any reason that one couldn=E2=80=99t wri= te a utility to manage this, but it=E2=80=99s not worth the effort to me. T= hese rare cases are easily managed manually.<br> <br> In any case, this is most definitely not the responsibility of the schemati= c editor in a well-factored EDA toolkit.<br> <span class=3D"HOEnZb"><font color=3D"#888888"><br> </font></span></blockquote></div><br><br></div><div class=3D"gmail_extra">T= his is the difference between a small data environment like PCB entry and b= ig data like a half billion gate asic. What you see as a<br></div><div clas= s=3D"gmail_extra">rare event is now a frequent and almost expected occurren= ce. Doing anything manually is a huge risk in any asic design. You automate= everything or else you will be buried under a tsunami of code.<br><br></di= v><div class=3D"gmail_extra">What happens if you bring in code that needs a= fix that you simply change it yourself? Five years later a new team is for= med to design the follow on product to your current design. They will start= with your chip design and then add ,delete or modify code for the new prod= uct. They will download the latest versions of all your modules from their = sources.<br><br></div><div class=3D"gmail_extra">Somebody on the new team w= ill need to go in and exactly duplicate the work that you did on that modul= e. Did you leave enough<br></div><div class=3D"gmail_extra">documentation t= hat they know what needs to be done? As your designs grow you have to forma= lize and document everything to a much greater extent than you do now.<br><= br><br></div><div class=3D"gmail_extra">John Eaton<br><br><br></div><div cl= ass=3D"gmail_extra"><br><br></div><div class=3D"gmail_extra"><br><br><br><b= r><br></div></div> --001a11444200029e7805392d339e--
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