1 2 Previous Next 16 Replies Latest reply on Oct 6, 2015 11:55 AM by user_14586677

    Unable to pack the design into 4 UDBs - Control file doesn't help

    user_180295388

      My project doesn't fit into the UDBs. The workaround with the control file doesn't work as mentioned. Any idea?

         

      The placer is not able to place all of the carry chains without backtracking. It fills one UDB bank to 15/16 and the other to 7/8 and cannot place the final 2-datapath chain. As a workaround, add a control file to the TopDesign component (in Workspace Explorer's Components tab) with the following lines: ATTRIBUTE placement_force OF \Timer_ADPActiveTime:TimerUDB:sT16:timerdp:u0\ : LABEL IS "U(2,0)"; ATTRIBUTE placement_force OF \Timer_OutputPeriod:TimerUDB:sT24:timerdp:u0\ : LABEL IS "U(3,1)"; ATTRIBUTE placement_force OF \Timer_OutputActiveTime:TimerUDB:sT24:timerdp:u0\ : LABEL IS "U(0,1)"; This will fill the datapaths in the second UDB bank and allow the placer to assign the remaining datapaths.

        1 2 Previous Next