Optional port in grc block

GNU Radio
1

Hi all,

I would like to have grc block with a bool option “Debug”.
Once this is set to True, then I would like to have an additional output
port.

How do I do that?

I already added this part in the xml file:

Debug debug False bool

but now I don’t know how to use this variable to make the additional
port
appear
in the block.

thanks
Achilleas

2

Achilleas,

ports can use the tag like params do (note this tag is the last
tag for any sink or source). Just put some Cheetah code in there to
check for $debug and set hide to all, part or none.

M

3

On Sun, Jan 4, 2015 at 5:17 AM, Martin B. [email protected]
wrote:

Achilleas,

ports can use the tag like params do (note this tag is the last
tag for any sink or source). Just put some Cheetah code in there to
check for $debug and set hide to all, part or none.

M

There are lots of examples for how to use the hide tag in parameters and
ports, though mostly for message ports. Check out the
constellation_receiver XML file for how it uses a boolean parameter to
determine if it should show the message port or not.

Tom