Keywords: 9500, assertion, abnormal program termination
Urgency: Standard
Problem Description:
When implementing a 9500 CPLD design, the following error may occur:
hitop -f logic.xff -s -l logic.log -o logic
Optimizer/Partitioner Version XACT-CPLD-V6.0.2 (c) Copyright 1989-1995 Xilinx Inc. All rights reserved. Reading logic.xff Assertion failed: ia.RetSize()==1 && ia[0]->RetInputInstance(), file outinst.cc, line 366
abnormal program termination
CAUSE: This error may happen if there is a wrong connection like OBUF driving internal logic. This can be verified from the schematics or the .xff file. An example of .xff file would be:
SYM, $I51, OBUF, SCHNM=OBUF, LIBVER=2.0.0 PIN, I, I, $Net00033_ PIN, O, O, SWIRLSELUP ^^^^^^^^^^ END SYM, $I75, INV, SCHNM=INV, LIBVER=2.0.0 PIN, I, I, SWIRLSELUP ^^^^^^^^^^ PIN, O, O, $Net00051_ END
SYM, $I79, AND, SCHNM=AND2, LIBVER=2.0.0 PIN, I0, I, SWIRLSELUP ^^^^^^^^^^ PIN, I1, I, $Net00050_ PIN, O, O, $Net00056_ END ...
解决方案
1
An OBUF can only drive an OPAD, IOPAD, or IBUF. Remove the incorrect connection to fix the problem.
2
There will be an explicit message in the M1 release of the software. You will get message like: ERROR:basnu - output pad net 'SWIRLSELUP' has illegal connection