Re: GRC General Comment & Question

[CEL]

Dear John,

you mean an external device that can interact with GNU Radio's sample
streams?

Well, I'd say it's not very hard per se – all you need is to write a
driver for that device. That driver needs to have an interface that you
can use to transmit samples from your PC to the device, or get samples
from that device into your PC.
Then, you'd call that from within a GNU Radio block. It's pretty much
exactly what the USRP sink and source, or the audio sink and source do.

The question of "how hard is it" is, however, tends to be dominated by
boundary conditions: How fast do you need things to be? How experienced
are you at building devices, and how experienced at writing drivers? Or
do driver and device already exist, and you only need to write that GNU
Radio block? Then it's mostly a question of programming proficiency.

Best regards,
Marcus

On Wed, 2020-01-08 at 06:41 -0500, John Wood via GNU Radio, the Free &
Open-Source Toolkit for Software Radio wrote:
> Good morning Marcus, and to the other erudite, frequent contributors to this 
> e-mail list.  I'm far from a subject matter expert on the GNU Radio Companion 
> (GRC) but consider it to be one of the best examples of a user-friendly, 
> mouse-driven, object-oriented programming environment.  My hat's off to its 
> original creator(s).  Oh yeah, and the price is right ;-) The number of 
> devices/tools available right out of the box is quite impressive IMO and the 
> fact that GRC generates executable Python source code is a bonus.  My 
> question is how relatively difficult is it to create a new device (USRP, 
> filters, modulators etc) that can be dragged to the GRC work area?  Thanks 
> for your time and comment.  VTY,
> 
> 
> J.B. Wood

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