question on Quratus and its waveform

[Amit]

Hi group,

I'm using Quratus II for VHDL and in its waveform I need to define an
input as floating point (which is in binary currently). I tried right-
click to change its value from
1 1000 0000 01000 0000 0000 0000 000 to -2.5 however, there
is no such a thing.All you can set is octal, hex, ascii but no
floating point. How can I show an input in decimal either with + or -
sign?

Thanks.
Amit

 

[Mike Treseler]

Amit wrote:

I'm using Quratus II for VHDL and in its waveform I need to define an
input as floating point (which is in binary currently). I tried right-
click to change its value from
1 1000 0000 01000 0000 0000 0000 000 to -2.5 however, there
is no such a thing.All you can set is octal, hex, ascii but no
floating point. How can I show an input in decimal either with + or -
sign?

Quartus web edition has no vhdl simulator.
You need the licensed version of Quartus to
get the oem modelsim simulator.
That will support the signed type which
covers signed vectors.

However, no synthesis software covers floating
point values directly so there is no point
in using it for testbench stimulus.

-- Mike Treseler

 

[Amit]

On Oct 23, 1:52 pm, Mike Treseler <mike_trese...@comcast.net> wrote:

Amit wrote:
I'm using Quratus II for VHDL and in its waveform I need to define an
input as floating point (which is in binary currently). I tried right-
click to change its value from
1 1000 0000 01000 0000 0000 0000 000 to -2.5 however, there
is no such a thing.All you can set is octal, hex, ascii but no
floating point. How can I show an input in decimal either with + or -
sign?

Quartus web edition has no vhdl simulator.
You need the licensed version of Quartus to
get the oem modelsim simulator.
That will support the signed type which
covers signed vectors.

However, no synthesis software covers floating
point values directly so there is no point
in using it for testbench stimulus.

-- Mike Treseler

Hi Mike,

I have started VHDL seriosuly since September so still lots of thing
must learn and I don't know, it seems I haven't asked my quesiton
well. What I meant was the file you create with an extension *.vwf
Yes, I'm using the Web edition and it allows me to simulate (to me
simulation means the result I get on waveform! correct me if I'm
wrong). However, it seems you mean something else from simulator.
But you are right seems there is no such a thing to represetn your
nodes in floating point format the way we can have in binray, hex
and ...

Thank you.
Amit

 

[Mike Treseler]

Amit wrote:

I have started VHDL seriously since September so still lots of thing
must learn and I don't know, it seems I haven't asked my question
well. What I meant was the file you create with an extension *.vwf
Yes, I'm using the Web edition and it allows me to simulate (to me
simulation means the result I get on waveform!

Yes this is a simulator, but it has nothing to do with vhdl
and it is desperately inflexible for serious work.
http://groups.google.com/groups/search?q=%22desperately+inflexible%22

 

[Amit]

On Oct 24, 8:26 am, Mike Treseler <mike_trese...@comcast.net> wrote:

Amit wrote:
I have started VHDL seriously since September so still lots of thing
must learn and I don't know, it seems I haven't asked my question
well. What I meant was the file you create with an extension *.vwf
Yes, I'm using the Web edition and it allows me to simulate (to me
simulation means the result I get on waveform!

Yes this is a simulator, but it has nothing to do with vhdl
and it is desperately inflexible for serious work.http://groups.google.com/groups/search?q=%22desperately+inflexible%22

Wow!!! do you mean it is not considered for a real project and it is
designed for students only?! the way you explained it, sounds it is
not reliable at all. Then, what should I do and what tools should I
use? this is so depressing.