Answers Database
XBLOX 5.x: Possible simulation problems if the labels are missing
Record #1468
Product Family: Software
Product Line: XACT FPGA
Product Part: xblox
Product Version: 5.2
Problem Title:
XBLOX 5.x: Possible simulation problems if the labels are missing
Problem Description:
Urgency: Standard
General Description:
Designers may run into problems implementing or simulating XBLOX designs if
labels do not exist on all XBLOX buses. If labels do not exist on all
XBLOX buses, they may show up as undefined in simulation.
Solution 1:
Always label buses associated with XBLOX symbols, including:
1. XBLOX buses between two XBLOX symbols.
2. XBLOX or non-XBLOX buses between an XBLOX and non-XBLOX symbol.
For example, if an FD8CE (non-XBLOX symbol) is driving a BUS_IF08 (XBLOX
symbol) and BUS_IF08 is in turn driving a SLICE (XBLOX symbol), add the
label 'COUNT[7:0]' with indices between the FD8CE and BUS_IF08 and add the
label 'SPLIT' between BUS_IF08 and SLICE without indices on it.
End of Record #1468 - Last Modified: 05/24/99 11:25 |
