Using parameters to enable/disable a signal from module

[StefanLevie]

I know that you can use defines to enable/disable a signal from a
module such as:

module my_module
(
input sig_A,
`ifdef TYPE_IS_MULTI
input sig_B,
`endif
....

Since `defines are global, it's tricky (but not impossible) to use
this module multiple times with different configurations.

Is it possible to replace `define / `ifdef with a parameter and
effectively do the same thing?

I am already using parameters to control the width (number bits) of a
signal, but have not been able to find an example where they enable/
disable the signal.

Thanks,

Stefan

 

[gabor]

On Aug 12, 12:04 pm, StefanLevie <ste...@technobox.com> wrote:

I know that you can use defines to enable/disable a signal from a
module such as:

module my_module
(
input sig_A,
`ifdef TYPE_IS_MULTI
input sig_B,
`endif
...

Since `defines are global, it's tricky (but not impossible) to use
this module multiple times with different configurations.

Is it possible to replace `define / `ifdef with a parameter and
effectively do the same thing?

I am already using parameters to control the width (number bits) of a
signal, but have not been able to find an example where they enable/
disable the signal.

Thanks,

Stefan

It is, of course allowable to leave ports open during
instantiation, and with a parameter it is easy enough
to render a port effectively unused. I realize that
from an aesthetic point of view it's not as neat as
removing the port, but after synthesis the results
are pretty much the same.

Regards,
Gabor