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Re: [Discuss-gnuradio] work function - how it fits in the big picture
From: |
Charles Swiger |
Subject: |
Re: [Discuss-gnuradio] work function - how it fits in the big picture |
Date: |
Thu, 20 Apr 2006 11:53:03 -0400 |
On Wed, 2006-04-19 at 17:41 -0700, Eric Blossom wrote:
> To make the new code match the behavior of GrAtscTrellisEncoder
> (which is what I think you're up to) you'll need to derive from
> gr_sync_block and add this to your constructor:
>
> set_output_multiple(atsci_trellis_encoder::NCODERS);
>
Great - that seems to work.
> I also suggest adding the "paranoid check" that's at the bottom of
> GrAtscTrellisEncoder if you haven't already.
That check is in the atsci_trellis_encoder.cc.
Ok - I'm going to spend time trying to understand all that. Putting
the same thing in atsc_viterbi_decoder.cc compiles and runs and
gets this further down the loopback:
sched: <gr_block atsc_viterbi_decoder (21)> is requesting more input
data
than we can provide.
ninput_items_required = 12
max_possible_items_available = 7
If this is a filter, consider reducing the number of taps.
It wants 12 4096-byte soft_data_segment, or 49152 bytes. Max
available is 28672.
Well, one solution is to go into
gnuradio-core/src/python/gnuradio/gr/flow_graph.py and change
fixed_buffer_size to:
self.fixed_buffer_size = 64*1024
from 32*1024
then make, make install. Don't know if that can by dynamically
changed from the processing block.
Runs, few issues in the qa script then will update cvs.
--Chuck
- [Discuss-gnuradio] work function - how it fits in the big picture, Charles Swiger, 2006/04/19
- Re: [Discuss-gnuradio] work function - how it fits in the big picture, Michael Dickens, 2006/04/19
- Re: [Discuss-gnuradio] work function - how it fits in the big picture, Charles Swiger, 2006/04/19
- Re: [Discuss-gnuradio] work function - how it fits in the big picture, Eric Blossom, 2006/04/19
- Re: [Discuss-gnuradio] work function - how it fits in the big picture,
Charles Swiger <=
- Re: [Discuss-gnuradio] work function - how it fits in the big picture, Eric Blossom, 2006/04/20
- Re: [Discuss-gnuradio] work function - how it fits in the big picture, Charles Swiger, 2006/04/20
- Re: [Discuss-gnuradio] work function - how it fits in the big picture, Eric Blossom, 2006/04/20
- Re: [Discuss-gnuradio] work function - how it fits in the big picture, Charles Swiger, 2006/04/20
- [Discuss-gnuradio] USRP+Digital Radio Mundial, Brett L Trotter, 2006/04/20
- Re: [Discuss-gnuradio] USRP+Digital Radio Mundial, Robert McGwier, 2006/04/21
- Re: [Discuss-gnuradio] USRP+Digital Radio Mundial, Eric Blossom, 2006/04/21
- Re: [Discuss-gnuradio] work function - how it fits in the big picture, Eric Blossom, 2006/04/20