GNU Radio blocks, GRC and .yml files

[Ralf Gorholt]

Dear all,

I am still a GNU Radio beginner and at the moment I try to figure out
how to develop an OOT block for GNU Radio. The tutorial explains how to
do this and I have managed to create my first block. However, when it
comes to the .yml file, I don't find all the information that I need. Is
there a document that explains _in detail_ the block descriptions?

I have already looked at https://wiki.gnuradio.org/index.php/YAML_GRC
but this page does not answer my question. I am looking for a
possibility to create an enumeration of float values. Is this possible
or are only integer values allowed (as in C/C++)?

For example, in my block I need an option called "Guard interval" that
has four possible values: 0.25, 0.125, 0.0625 and 0.03125. The
corresponding labels would be 1/4, 1/8, 1/16 and 1/32. How can I do this?

Thank you very much for your help!

Kind regards,

Ralf