Go Back   Velocity Reviews > Newsgroups > VHDL
User Name
Password
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply

VHDL - Problem with Fix_std

 
Thread Tools Search this Thread
Old 11-24-2006, 10:45 AM   #1
Default Problem with Fix_std


Hi people,

we are using this fix_std library, but we have a problem with the
assignament. If we use local variables, it works right... but if we use
global signals, the value doesn't change and remain "UUUU...".

Why?

Thanks to all!!!

Bye



Luca
  Reply With Quote
Old 11-24-2006, 12:00 PM   #2
Ajeetha
 
Posts: n/a
Default Re: Problem with Fix_std

I believe you are referring to:

FIX_STD from:

http://www.doulos.com/knowhow/vhdl_d...dels/fp_arith/

Can you show us your code that uses this pkg? Without it it is hard to
comment

Regards
Ajeetha, CVC
www.noveldv.com

Luca wrote:
> Hi people,
>
> we are using this fix_std library, but we have a problem with the
> assignament. If we use local variables, it works right... but if we use
> global signals, the value doesn't change and remain "UUUU...".
>
> Why?
>
> Thanks to all!!!
>
> Bye


  Reply With Quote
Old 11-25-2006, 05:01 PM   #3
Jonathan Bromley
 
Posts: n/a
Default Re: Problem with Fix_std

On 24 Nov 2006 02:45:11 -0800, "Luca" <> wrote:

>we are using this fix_std library, but we have a problem with the
>assignament. If we use local variables, it works right... but if we use
>global signals, the value doesn't change and remain "UUUU...".


hi Luca,

if you're talking about my fix_std package, downloaded from
doulos.com, then your best recommendation is: Don't.

I stopped work on it when the VHDL-200x standards group released
David Bishop's much more comprehensive packages. There are
several significant bugs in fix_std. The few people who used it in
the early days, and who kept in contact with me, were informed
about the worst of the bugs and given fixes. To be honest I
should have removed it completely from the website, but it was
never part of my core work and I'm sorry to say I haven't given
it any attention.

I'm not aware of any problem with fix_std that gives different
behaviour with variables and signals; if you post a code fragment
then perhaps we can try to comment, as Ajeetha said.

Thanks for the reminder; I'll take down the obsolete code from the
website as soon as I get back to the office next Thursday.
--
Jonathan Bromley, Consultant

DOULOS - Developing Design Know-how
VHDL * Verilog * SystemC * e * Perl * Tcl/Tk * Project Services

Doulos Ltd., 22 Market Place, Ringwood, BH24 1AW, UK

http://www.MYCOMPANY.com

The contents of this message may contain personal views which
are not the views of Doulos Ltd., unless specifically stated.
  Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump