Re: [Discuss-gnuradio] GRC problems

[Sebastian Koslowski]

Hi Johannes,

try this for #2:
https://github.com/skoslowski/gnuradio/commit/a79d235053df5ec697f393a21d1d37ea2967b9ed

Sebastian

On 10/12/2013 07:17 PM, Johannes Demel wrote:
> Hi list,
> 
> I discovered 2 problems with GRC recently.
> 
> 1. I have a custom block with a message port (with a fixed port name)
> and some stream ports which include a <nports>...</nports> definition.
> The whole thing works fine as long as I have a fixed number of ports.
> Each declared separately. But as soon as I use a nport statement GRC
> won't display this block correctly [1]. Even worse if I enter values
> which affect the number of ports, the whole flowgraph will disappear.
> Just a grey flowgraph page.
> 
> 2. To make things easier for me (and to not create a well known kind of
> artwork) I use hier blocks. This works fine as long as I have fixed size
> vector ports. But adding a parameter block, say vlen, for vector size to
> dynamically change the hier block doesn't work. The python generator
> does not generate the hier block python file with vlen as vector size.
> Instead it puts in the default value. A parameter block without default
> value results in an error. A hard coded vector size is not exactly
> helpful in this case.
> 
> I didn't have time to dig into it yet. Thus I thought I share my
> experience with you. Maybe I am not the only one with this problem and
> someone already knows how to fix it.
> 
> Happy hacking
> Johannes
> 
> [1]
> <sink>
>   <name>msg</name>
>   <type>message</type>
>   <optional>1</optional>
> </sink>
> 
> <sink>
>   <name>in</name>
>   <type>complex</type>
>   <vlen>$vlen</vlen>
>   <nports>$ports</nports>
> </sink>
> 
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>

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