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Heights in IDF Export

nimoster
Hi Guys

First of all: Thanks for this great forum which is such a great resource for problem solutions!

Now here's what's driving me crazy at the moment:
I try to export IDF data from Allegro for use within ProE. I checked several posts here as well as the documentation how to do that. As far as I understood IDF get's the hight information in the following priority order:

1. From the HIGHT property in the component
2. From the PACKAGE_HEIGHT_MAX (and PACKAGE_HEIGHT_MIN) from the PLACE_BOUND_TOP
3. From the Default-Height-Input in the IDF Export dialog

I don't use the HIGHT property in the component. So, I want to use the PACKAGE_HEIGHT_MAX information attached to PLACE_BOUND_TOP. If I set this value already in my package symbol (I mean the library footprint) which is then used in a board file everything is fine - I can find the correct height value in the exported IDF file.

The problem occures if there is no height information stored in the original package symbol. If I set the PACKAGE_HEIGHT_MAX for a symbol directly in my board file (via Setup -> Areas -> Package Hight... and click on a symbol) the PACKAGE_HEIGHT_MAX is set correctly (confirmed by right-click on symbols PLACE_BOUND_TOP -> Show element...) but if I do an IDF export it just ignores this information and sets every symbol to the default height value given in the export dialog.

By the way: I tried both settings of "idf_ignore_comp_height" and played around with "idf_place_bounds_top/bottom" in the User Preferences... -> Interfaces -> IDF setting - unfortunately with no success.

Can anybody figure out what I'm doing wrong?

Greetings
Martin
  • Rik Lee

     As you have found Allegro only outputs the symbol definition, as defined in the library, and not the instance definition.

    The IDF Specification defines the Library file as a definition file. In order to support instance based output this would require the symbol name along with the part number to make up a unique entry in the placement section of the file. This, I believe, is not consistent with the intended use of the Library file by the IDF Specification

  • Cadpro2K

     are you sure you've unselected the 'use default height' in the export GUI when you're outputting the idf file? I've never seen this activity.

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