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Have a question about CadSoft EAGLE?  Ask our Expert, Jorge!

Jorge_Garcia

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Jorge Garcia

I'm a young engineer with extensive experience working on EAGLE. My interests include Power Supply design and LED solid state lighting, and I'm always impressed by a well designed PCB.

 

 

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  • My question lays in the autorouting and/or wiring algorithm. Can you describe for me, in great detail, how the autorouting system works? Where is the file that handles this? Would you explain the major points of that as well? How does the entire EAGLE program determine the best/shortest route to lay wires? This is a question of efficiency.

     

    Thanks again!

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  • My question lays in the autorouting and/or wiring algorithm. Can you describe for me, in great detail, how the autorouting system works? Where is the file that handles this? Would you explain the major points of that as well? How does the entire EAGLE program determine the best/shortest route to lay wires? This is a question of efficiency.

     

    Thanks again!

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  • in reply to Former Member

    On 11/5/2013 5:41 PM, Elliott L wrote:

    My question lays in the autorouting and/or wiring algorithm. Can you

    describe for me, in great detail, how the autorouting system works?

    Where is the file that handles this? How does the entire EAGLE program

    determine the best/shortest route to lay wires?

     

    Hi Elliott,

     

    In a nutshell, EAGLE's autorouter is a grid-based router. Its splits up

    your board area based on the routing grid and proceeds to route until it

    runs into a roadblock. At that point it will ripup a certain number of

    already routed tracks defined by mnRipupLevel. It then starts to route

    again. Section 7.7 of the manual describes this process in detail.

     

    From this simple description you can infer that EAGLE isn't concerned

    with best or shortest path, it's just trying to get everything

    connected. By adjusting certain cost factors you can guide it to seek

    the shortest paths, but there's no guarantee that it will.

     

    You can load and save various cost configurations for the autorouter,

    but the actual code is within the EAGLE executable.

     

    hth,

    Jorge Garcia

    Cadsoft Support