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Message
From: tullio.grassi at gmail.com<tullio.grassi@g...>
Date: Mon Aug 21 17:56:51 CEST 2006
Subject: [oc] radix 4 complex fft by ZHAO Ming ( cfft )
We have used the radix 4 complex fft by ZHAO Ming ( cfft project ).
It seems to work fine, but our simulators (ModelSim and ISE sim) give
really a lot (1000's) of identical warnings.
ISE sim gives:
Warning: There is an 'U'|'X'|'W'|'Z'|'-' in an arithmetic operand,
the result will be 'X'(es).
I traced it back to cfft4.vhd, where signal RegAI is used in the case
statement without being initialized properly (that is not all
components are initialized in each case).
I tried to fix it but unsuccesfully (I am more a verilog guy than vhdl).
Has anybody fixed this problem ?
It is really annoying because the useful messages from the simulator
get lost between the 1000's of warnings.
Tullio
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