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backannotation

rainbowtrout

i am using allegro pcb and capture. my question is what files are need to backanno to capture, and how to generate. The bd was renaned with no errors.  i was using Orcad before and there was a swap file that was used, is there still a swap file for allegro?

  • redwire

    As with OrCAD and Capture, the packager is used to auto-generate the backannotation file.  Your use of the swp file is somewhat manual.  Capture needs the packager "Import Logic" function and it will backannotate the schematic against the board.

  • Khurana

    Backannotation can be invoked from within OrCAD Capture - click Tools > Back Annotate >point (select) the .brd file and the file will be generated automatically...

  • Cadpro2K
    If the only change done on the board is a re sequencing of reference designators
    then there is an alternative to the third party back annotation.

    After re-annotation the board is completed, Allegro creates a file called rename.log or
    reftext.log. This file can easily be turned into a swap file which can be applied to Capture

    The format of a Capture swap file is

    CHANGEREF H1  H1
    CHANGEREF R5082   R1
    CHANGEREF R5084   R2


    For example the rename.log file lists

    Processing TOP of board, R5471 has AUTO_RENAME property but is on BOTTOM, component ignored.
    Processing TOP of board, R5470 has AUTO_RENAME property but is on BOTTOM, component ignored.
    OLD H1    NEW H1
    OLD R5082    NEW R1
    OLD R5084    NEW R2

    For example the reftext.log file lists

    *NOTE: Refdes C281 changed to C33
    *NOTE: Refdes U12 changed to U44
    *NOTE: Refdes C44 changed to C15

    Either of these files can easily be converted to the Capture swap file format using find
    and replace in a text editor .

    Some suggestions

    Lines can be commented out the  by adding a *
    For example find and replace "Processing" with "*Processing"
    Then changing the word OLD to the command CHANGREF
    Then replacing the word NEW with a space
     
    The result will be
     
    * Processing TOP of board, R5471 has AUTO_RENAME property but is on BOTTOM, component ignored.
    * Processing TOP of board, R5470 has AUTO_RENAME property but is on BOTTOM, component ignored.
    CHANGEREF H1  H1
    CHANGEREF R5082   R1
    CHANGEREF R5084   R2
     
    Then this SWAP file can be applied by going to tools back annotate, select the layout tab
    and point to the .SWP file you just created.
  • rainbowtrout

    Thanks everyone your help, it was useful and the backannotaion was completed with out errors.

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