Re: [Discuss-gnuradio] GRC: Serial Port to Block Diagram Interface

[Martin Juhl Jorgensen]

Using the same example as a base

> > This is the portion of the code I am using (from probe.py) to insert 
> > messages into the queue:
> > ....
> >          arr = numpy.array(random.random(), numpy.float32)
> >          return gr.message_from_string(arr.tostring(), 0, 
> > gr.sizeof_float, 1)
> >          self._msgq.insert_tail(msg)
> > ....

I was also seeing nothing on the scopes, but

> If you are having issues with the plotters, make sure that the samples 
> rates match up, that can cause issues because the plotters try to decimate 
> to achieve frame rate.

helped and matching the rates fixed the issue.

I have successfully added a serial connection using the same approach, but 
there are some type casting/wrapping issues: the above approach uses a numpy 
array to convert an int/a float into the binary reprensentation. So to read 
a number from the serial connection involves parsing the ASCII -> number 
(int/float) -> binary format.

But what about the other formats available?

Byte/char is easy, as it is just to pass the correct amount of bytes to the 
msg queue, but how do I represent e.g. complex signals in binary?

- Martin