Answers Database
MAP M1.1.1a: -os speed causes BITGEN-DRC ERROR:0 - netcheck: no source pins found on signal
Record #1898
Problem Title:
MAP M1.1.1a: -os speed causes BITGEN-DRC ERROR:0 - netcheck: no source pins found on signal
Problem Description:
Due to a bug in MAP, a signal driver gets left out when the -os speed
option is used. The signal does not get optimized out because it is
not truly sourceless. Since it does not have a driver, PAR does not
route it, so BITGEN will eventually give a simular error:
BITGEN: Xilinx Bitstream Generator M1.1.1a
Copyright (c) 1995-1996 Xilinx, Inc. All rights reserved.
Running DRC.
ERROR:0 - netcheck: no source pins found on signal pad2XilinxCore0/n718.
ERROR:0 - netcheck: signal pad2XilinxCore0/n718 is unrouted.
ERROR:0 - blockcheck: F4 on component pad2XilinxCore0/n579 has a used term but is unrouted.
ERROR:0 - blockcheck: G1 on component pad2XilinxCore0/n579 has a used term but is unrouted.
ERROR:0 - blockcheck: F3 on component pad2XilinxCore0/n584 has a used term but is unrouted.
ERROR:0 - blockcheck: F4 on component pad2XilinxCore0/n582 has a used term but is unrouted.
WARNING:0 - DRC detected 6 errors and 0 warnings.
Solution 1:
Remove the -os speed option form the command line.
Reference BUG # 15074.
End of Record #1898 - Last Modified: 02/06/97 14:53 |
