Answers Database
2.1i PAR - Route results lead to DRC warning: WARNING:basdr:7 - Netcheck: An antenna was found on signal "hp_rdy";
Record #5098
Product Family: Software
Product Line: FPGA Implementation
Product Part: par
Problem Title:
2.1i PAR - Route results lead to DRC warning: WARNING:basdr:7 - Netcheck: An antenna was
found on signal "hp_rdy";
Problem Description:
Urgency: Standard
General Description:
On running bitgen, the following DRC warning may appear:
WARNING:basdr:7 - Netcheck: An antenna was found on signal "hp_rdy"; this
means that a branch of this signal is partially routed or has a routing stub.
DRC detected 0 errors and 1 warnings.
This is despite PAR finishing sucessfully and reporting:
All constraints were met.
All signals are completely routed.
Solution 1:
This warning message is due to the router leaving a routing resource configured
that leads nowhere.
Some of these issues have been fixed by 1.5i service pack 2. If you are using 1.5i and
do not have SP2 installed, it can be obtained at:
http://support.xilinx.com/support/techsup/sw_updates/.
However, there are some existing issues in 1.5i and 2.1i that are still being
investigated. In this case, there are a few work-arounds that can help this
issue. The first is to load the design in EPIC (FPGA Editor in 2.1i), unroute
the problem net, the re-route the net. The second is to run a re-entrant route
on the routed NCD file that has the antennas. This problem is scheduled to be
fixed in the next (as yet unnamed) major release after 2.1i.
End of Record #5098 - Last Modified: 10/20/99 14:04 |
