multiple individual bidirectional signal concatenated into 1bidirectional bus
 

Hi,
I was wondering how to concatenate multiple individual bidirectional
signals into 1 bidirectional bus
Would something like this work?
Wouldn't the simulator throw X's on the signal a,b,c because driven
from two places.
Thanks for the help,
Amish

Re: multiple individual bidirectional signal concatenated into 1 bidirectional bus
 

Amish Rughoonundon wrote:

> Hi,
> I was wondering how to concatenate multiple individual bidirectional
> signals into 1 bidirectional bus
>

Code:

---

> signal a : std_logic;
> signal b : std_logic;
> signal c : std_logic;
> signal d : std_logic_vector;
>
> test1 : test1
> port map(
> a => a,
> b => b,
> c => c
> );
>
> d <= a & b & c;
> a <= d(2);
> b <= d(1);
> a <= d(0);
>
> test2 : test2
> port map(
> d => d
> );
>

---

>
> Would something like this work?

No.

> Wouldn't the simulator throw X's on the signal a,b,c because driven
> from two places.

Yes. So only combine signals that go in the same direction.

> Thanks for the help,

--
Paul Uiterlinden
www.aimvalley.nl
e-mail addres: remove the not.