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How can I cut a routing blockage in FE?

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Dear ALL:

I want to cut a routing blockage in one floorplan to make routing guides. For example, I dont have M5 cell routing blockage in a LEF hard block, I add this routing blockage at the top level, I have to cut some notches according to the pin shapes (if pins are on M5), then router can make M5 connections to these pins without DRC. How can I cut these notches on the added M5 routing blockage, this is more like a polygon operation, do Encounter have such db commands? I dont want to modify the LEF file (to add the M5 obstruction).

Thanks in advance!


Originally posted in cdnusers.org by eminemshow
Parents

  • Hi Bob,

    Thanks for this feedback. I am trying to implement this but I have a couple of issue. As I am a beginner with dbGet, I did run some experiments but I am a bit stuck.

    I am using SOC 8.1

    There were complains about boxes (not recognized as attributes. Expected : box ?) and dbShape (ex: dbShapeRect now ?). So, I am cuurently with :

    foreach box [dbShapeRect [dbGet -p [dbGet -p2 top.insts.cell.baseClass block].box] SIZE -5] {createRouteBlk -layer 5 -box $box}

    I have added the -p to return pointers but dbShapeRect still complains it expects a pointer (I got: Usage: dbShapeRect <ShapePtr>)

    However, If I type only : dbGet -p [dbGet -p2 top.insts.cell.baseClass block].box
    0x11fa2f038 0x11fb5e5b0

    that gives a list of pointers and seem correct, so i don't know what is the issue.

    In case you could have a look as this is obviously a very useful ietms for many design.

    Thanks

    Patrice

Reply

  • Hi Bob,

    Thanks for this feedback. I am trying to implement this but I have a couple of issue. As I am a beginner with dbGet, I did run some experiments but I am a bit stuck.

    I am using SOC 8.1

    There were complains about boxes (not recognized as attributes. Expected : box ?) and dbShape (ex: dbShapeRect now ?). So, I am cuurently with :

    foreach box [dbShapeRect [dbGet -p [dbGet -p2 top.insts.cell.baseClass block].box] SIZE -5] {createRouteBlk -layer 5 -box $box}

    I have added the -p to return pointers but dbShapeRect still complains it expects a pointer (I got: Usage: dbShapeRect <ShapePtr>)

    However, If I type only : dbGet -p [dbGet -p2 top.insts.cell.baseClass block].box
    0x11fa2f038 0x11fb5e5b0

    that gives a list of pointers and seem correct, so i don't know what is the issue.

    In case you could have a look as this is obviously a very useful ietms for many design.

    Thanks

    Patrice

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