Re: [Discuss-gnuradio] Message Passing

[Activecat]

On Wed, May 14, 2014 at 6:18 PM, Activecat <address@hidden> wrote:

On Wed, May 14, 2014 at 5:50 PM, Sylvain Munaut <address@hidden> wrote:

Did you define the message port in the .grc XML file for your blocks ?
Something like :

  <sink>
    <name>portname</name>
    <type>message</type>
    <optional>1</optional>
  </sink>

Then they should show as message port in the GRC UI and you need to
connect them in the GUI.

This works: (this add additional port in gray color)
  <source>
    <name>print</name>

    <type>message</type>
    <optional>1</optional>

  </source>

Whereas this doesn't work: (the block becomes disappeared in the GRC)
  <sink>
    <name>print</name>

    <type>message</type>
    <optional>1</optional>
  </sink>

Then how to define the message sink port?

I have then tested few combinations, it seems that a source block cannot have a message sink port.

Is there such a restriction ..?