New layer 99 in eagle?

Am 08.07.2014 13:07, schrieb Joern Paschedag:

Devices in the diode.lbr contain a new layer 99 "spice order" in devices

1N4004, 1N4148, 1N4446...

I haven't checked other libraries...

 

Is this correct?

 

This happens in eagle 6.6.0 and also in 6.91.2 beta (win8.1)

In EAGLE V6, we started into a cooperation with Linear Technology.

LT offers a free spice simulator, LTspiceIV. For exchanging data we

require simualtion information for the libraries of LTSpice.

Each PIN in EAGLE has to be assigned to a number, the Spice order.

This was done with the help of a new layer. It was impossible to

manage this with attributes. So we decided to introduce a layer

"99, Spice Order" where the required information is placed as a

text directly at the coordinate of the PIN in the symbol.

So a ULP compares the coordinates of the PIN with the coordinates

of the text and recognizes the assignment.

Layer 99 may be switched off at any time in the eagle.scr with

DISPLAY NONE 91 21 94 95 96 97 98;

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Mit freundlichen Gruessen / Best regards

Richard Hammerl

  CadSoft Support -- hotline@cadsoft.de

  FAQ: http://www.cadsoft.de/training/faq/

Am 24.07.2014 um 14:44 schrieb Richard Hammerl:

Am 08.07.2014 13:07, schrieb Joern Paschedag:

Devices in the diode.lbr contain a new layer 99 "spice order" in devices

1N4004, 1N4148, 1N4446...

I haven't checked other libraries...

 

Is this correct?

 

This happens in eagle 6.6.0 and also in 6.91.2 beta (win8.1)

 

In EAGLE V6, we started into a cooperation with Linear Technology.

LT offers a free spice simulator, LTspiceIV. For exchanging data we

require simualtion information for the libraries of LTSpice.

 

Each PIN in EAGLE has to be assigned to a number, the Spice order.

This was done with the help of a new layer. It was impossible to

manage this with attributes. So we decided to introduce a layer

"99, Spice Order" where the required information is placed as a

text directly at the coordinate of the PIN in the symbol.

 

So a ULP compares the coordinates of the PIN with the coordinates

of the text and recognizes the assignment.

 

Layer 99 may be switched off at any time in the eagle.scr with

DISPLAY NONE 91 21 94 95 96 97 98;

 

 

Thanks for the information but layer99 is not mentioned in eagle help.

--

Mit freundlichen Grüßen / With best regards

Joern Paschedag

Joern Paschedag wrote on Thu, 24 July 2014 09:43

Am 24.07.2014 um 14:44 schrieb Richard Hammerl:

Am 08.07.2014 13:07, schrieb Joern Paschedag:

Devices in the diode.lbr contain a new layer 99 "spice order" in

devices

1N4004, 1N4148, 1N4446...

I haven't checked other libraries...

 

Is this correct?

 

This happens in eagle 6.6.0 and also in 6.91.2 beta (win8.1)

 

In EAGLE V6, we started into a cooperation with Linear

Technology.

LT offers a free spice simulator, LTspiceIV. For exchanging data

we

require simualtion information for the libraries of LTSpice.

 

Each PIN in EAGLE has to be assigned to a number, the Spice

order.

This was done with the help of a new layer. It was impossible to

manage this with attributes. So we decided to introduce a layer

"99, Spice Order" where the required information is placed as a

text directly at the coordinate of the PIN in the symbol.

 

So a ULP compares the coordinates of the PIN with the coordinates

of the text and recognizes the assignment.

 

Layer 99 may be switched off at any time in the eagle.scr with

DISPLAY NONE 91 21 94 95 96 97 98;

 

 

 

Thanks for the information but layer99 is not mentioned in eagle help.

Yeh, I don't remember that ever being mentioned.  I haven't used the

LTSpice interface much yet so I haven't run into it.  But, that should have

been announced in a very obvious way since users could have been using

layer 99 for something on their own.  Whenever a new layer is commandeered

there should be big, obvious release notes and lots of noise about it

because you could be breaking my current library.

James.

--

James Morrison  ~~~  Stratford Digital

Specializing in CadSoft EAGLE

• Online Sales to North America

• Electronic Design Services

Take advantage of v7 License Promotion right now at

http://www.eaglecentral.ca

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Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

Am 25.07.2014 um 01:28 schrieb James Morrison:

Joern Paschedag wrote on Thu, 24 July 2014 09:43

Am 24.07.2014 um 14:44 schrieb Richard Hammerl:

  Am 08.07.2014 13:07, schrieb Joern Paschedag:

  Devices in the diode.lbr contain a new layer 99 "spice order" in

devices

  1N4004, 1N4148, 1N4446...

  I haven't checked other libraries...

 

  Is this correct?

 

  This happens in eagle 6.6.0 and also in 6.91.2 beta (win8.1)

 

  In EAGLE V6, we started into a cooperation with Linear

Technology.

  LT offers a free spice simulator, LTspiceIV. For exchanging data

we

  require simualtion information for the libraries of LTSpice.

 

  Each PIN in EAGLE has to be assigned to a number, the Spice

order.

  This was done with the help of a new layer. It was impossible to

  manage this with attributes. So we decided to introduce a layer

  "99, Spice Order" where the required information is placed as a

  text directly at the coordinate of the PIN in the symbol.

 

  So a ULP compares the coordinates of the PIN with the coordinates

  of the text and recognizes the assignment.

 

  Layer 99 may be switched off at any time in the eagle.scr with

  DISPLAY NONE 91 21 94 95 96 97 98;

 

 

 

Thanks for the information but layer99 is not mentioned in eagle help.

 

Yeh, I don't remember that ever being mentioned.  I haven't used the

LTSpice interface much yet so I haven't run into it.  But, that should have

been announced in a very obvious way since users could have been using

layer 99 for something on their own.

Yeah, but it was always said not to use private layers below 100.

  Whenever a new layer is commandeered

there should be big, obvious release notes and lots of noise about it

because you could be breaking my current library.

 

James.

 

I see it the same way.

I thought it was an error because i didn't find that layer in rcl.lbr or

transistor.lbr which are imho also supposed to be used in spice. Also it

was not mentioned in the help, so I removed the layer.

--

Mit freundlichen Grüßen / With best regards

Joern Paschedag

If it had been documented as "reserved for future use" or something like

that (allocate some layers for special CADSOFT use and document it), then

they do indeed need to announce they have added a layer.  Nothing in the

documentation (that I have read) says anything about reserved layers, so

others can use them then it breaks their libraries when Cadsoft decides to

use that layer and it should be in the release notes in BOLD so others are

aware of it.  Stuff happens, but when you grab a layer that others may be

using since they were told they could use it, it needs to be clearly

identified to the user in the release notes and even a special notice in

the "What's new in this version".

mikey

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Drat - coffee has not kicked in ... should be "If it has NOT been

documented ... "

mikey

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On 25/07/14 16:36, Mike Fields wrote:

Stuff happens, but when you grab a layer that others may be

using since they were told they could use it,

From page 234 of the Eagle 4.1 user manual :

"If you want to create your own layers, please use layer numbers above 100."

They warned you. If you ignored them, it's not their fault.

Rob Pearce wrote on Fri, 25 July 2014 12:11

On 25/07/14 16:36, Mike Fields wrote:

Stuff happens, but when you grab a layer that others may be

using since they were told they could use it,

 

From page 234 of the Eagle 4.1 user manual :

 

"If you want to create your own layers, please use layer numbers above

100."

 

They warned you. If you ignored them, it's not their fault.

Whether it's there or not, I would expect that any new layers that are

created as a default should be listed in the release notes.

For instance, there are special layers in the 50's that aren't used but

work as auto-mirrored pairs (like tPlace and bPlace).  I use one of these

pairs since there is nothing like it above layer 100.

But in general, if something is done that could break users' libraries than

that should be listed in the release notes 100% of the time, whether there

is a warning in the manual or not.

Cheers,

James.

--

James Morrison  ~~~  Stratford Digital

Specializing in CadSoft EAGLE

• Online Sales to North America

• Electronic Design Services

Take advantage of v7 License Promotion right now at

http://www.eaglecentral.ca

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

Rob Pearce wrote on Fri, 25 July 2014 12:11

On 25/07/14 16:36, Mike Fields wrote:

Stuff happens, but when you grab a layer that others may be

using since they were told they could use it,

 

From page 234 of the Eagle 4.1 user manual :

 

"If you want to create your own layers, please use layer numbers above

100."

 

They warned you. If you ignored them, it's not their fault.

I had missed that - so the warning was there although it would still be

good practice to announce it in the release notes that they were going to

now be using that layer.  Like the old (this will date me !!) S-100 bus -

there were several undefined signals that a number of different venders

grabbed and used which then made some cards not play well on the bus.

mikey

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