Mail Archives: geda-user/2022/08/25/16:05:16
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> On Aug 25, 2022, at 2:12 PM, karl AT aspodata DOT se [via =
geda-user AT delorie DOT com] <geda-user AT delorie DOT com> wrote:
>=20
> The upper (gschem,gnetlist) doesn't have to know about what it is,
> it is up to the backend to handle the xxxx's and document its use,
But most attributes are already transparent to schematic capture and to =
the core netlister.
> and the backend might prefer some other syntax than var=3Dvalue.
>=20
And if that=E2=80=99s what it prefers, that=E2=80=99s fine. Both geda =
and lepton have supported arbitrary, multi-line strings as attribute =
values for years. But old-fashioned var=3Dvalue is also handy. =
gnet-spice-noqsi has its multiline macro attributes spice-prototype, =
spice-prolog, and spice-epilog, but it also uses file, model, and =
device. Macro expansion often picks up value, and it can pick up any =
other var=3Dvalue, handy for attributes like l=3D0.4u (400 nm channel) =
on a MOSFET.
So, the basic machinery is in place. With the right backend coding, it's =
easy to avoid the problems caused by overloading pinseq. But the thing =
we lack is conventions. What are our standard device attributes? What, =
exactly, goes into a value attribute? We=E2=80=99re missing some things: =
I use spec attributes (like spec=3D5% 1/10W) in my designs.
John Doty Noqsi Aerospace, Ltd.
jpd AT noqsi DOT com
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><br =
class=3D""><div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Aug 25, 2022, at 2:12 PM, <a =
href=3D"mailto:karl AT aspodata DOT se" class=3D"">karl AT aspodata DOT se</a> [via <a =
href=3D"mailto:geda-user AT delorie DOT com" =
class=3D"">geda-user AT delorie DOT com</a>] <<a =
href=3D"mailto:geda-user AT delorie DOT com" =
class=3D"">geda-user AT delorie DOT com</a>> wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><span =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: 400; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none; float: none; =
display: inline !important;" class=3D"">The upper (gschem,gnetlist) =
doesn't have to know about what it is,</span><br style=3D"caret-color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: 400; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;" class=3D""><span style=3D"caret-color: rgb(0, 0, =
0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: 400; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none; float: none; display: inline !important;" =
class=3D"">it is up to the backend to handle the xxxx's and document its =
use,</span><br style=3D"caret-color: rgb(0, 0, 0); font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: 400; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;" class=3D""></div></blockquote><br class=3D""></div><div>But most =
attributes are already transparent to schematic capture and to the core =
netlister.</div><div class=3D""><br class=3D""></div><blockquote =
type=3D"cite" class=3D""><span class=3D"" style=3D"float: none; display: =
inline !important;">and the backend might prefer some other syntax than =
var=3Dvalue.</span><br class=3D""><br class=3D""></blockquote><div =
class=3D""><br class=3D""></div>And if that=E2=80=99s what it prefers, =
that=E2=80=99s fine. Both geda and lepton have supported arbitrary, =
multi-line strings as attribute values for years. But old-fashioned =
var=3Dvalue is also handy. gnet-spice-noqsi has its multiline macro =
attributes spice-prototype, spice-prolog, and spice-epilog, but it also =
uses file, model, and device. Macro expansion often picks up value, and =
it can pick up any other var=3Dvalue, handy for attributes like l=3D0.4u =
(400 nm channel) on a MOSFET.<div class=3D""><br class=3D""></div><div =
class=3D"">So, the basic machinery is in place. With the right backend =
coding, it's easy to avoid the problems caused by overloading pinseq. =
But the thing we lack is conventions. What are our standard device =
attributes? What, exactly, goes into a value attribute? We=E2=80=99re =
missing some things: I use spec attributes (like spec=3D5% 1/10W) in my =
designs.</div><div class=3D""><br class=3D""><div class=3D"">
<span class=3D"Apple-style-span" style=3D"border-collapse: separate; =
border-spacing: 0px; font-variant-ligatures: normal; =
font-variant-east-asian: normal; font-variant-position: normal; =
font-weight: normal; line-height: normal;"><div style=3D"word-wrap: =
break-word;" class=3D""><span class=3D"Apple-style-span" =
style=3D"border-collapse: separate; border-spacing: 0px; color: rgb(0, =
0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-ligatures: normal; font-variant-caps: normal; =
font-variant-east-asian: normal; font-variant-position: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; =
widows: 2; word-spacing: 0px;"><p style=3D"margin: 0px;" class=3D""><font =
face=3D"Helvetica" size=3D"3" style=3D"font-style: normal; =
font-variant-caps: normal; font-weight: normal; font-size: 12px; =
line-height: normal; font-family: Helvetica;" class=3D"">John Doty<span =
class=3D"Apple-converted-space"> <span =
class=3D"Apple-converted-space"> </span><span =
class=3D"Apple-converted-tab"> <span =
class=3D"Apple-converted-space"> </span></span></span>Noqsi =
Aerospace, Ltd.</font></p><p style=3D"margin: 0px;" class=3D""><a =
href=3D"mailto:jpd AT noqsi DOT com" class=3D"">jpd AT noqsi DOT com</a></p><br =
class=3D"Apple-interchange-newline"></span></div></span><br =
class=3D"Apple-interchange-newline">
</div>
<br class=3D""></div></body></html>=
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