I usually jump up and down with excitement when people send
documentation patches, but this is not one that should go in GNU Radio.
First of all, deinterleave and stream_to_streams are not identical
unless you have unit block size. Second, we should fix the deinterleaver
rather than pointing out it is broken in the docs.
Would you want to fix the deinterleaver? Basically, it needs to follow
the 'process as much as you can' paradigm.
M
On 23.09.2014 00:02, ruben.m...@swisscom.com wrote:
Indeed.
Would the following patch to the documentation be useful (since streams to
stream seems to replace it properly)?
diff --git a/gr-blocks/include/gnuradio/blocks/deinterleave.h
b/gr-blocks/include/gnuradio/blocks/deinterleave.h
index a3b5480..1b9d5c1 100644
--- a/gr-blocks/include/gnuradio/blocks/deinterleave.h
+++ b/gr-blocks/include/gnuradio/blocks/deinterleave.h
@@ -40,6 +40,10 @@ namespace gr {
* a single input to each output unless blocksize is given in the
* constructor.
*
+ * This block can only process one block at a time. Therefore its
+ * efficiency may be limited. It is advised to use the streams to
+ * stream block instead.
+ *
* \code
* blocksize = 1
* connections = 2
Ruben
From: discuss-gnuradio-bounces+ruben.merz=swisscom....@gnu.org
[mailto:discuss-gnuradio-bounces+ruben.merz=swisscom....@gnu.org] On Behalf Of
Martin Braun
Sent: Tuesday, September 23, 2014 1:11 AM
Cc: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] Issue with deinterleave block from a file
source to USRP sink with x300
It seems deinterleave is both buggy and inefficiently designed. The bug is the
relative rate is wrong, the inefficiency is that it only works on one block at
a time. I suggest using something else.
M
On Fri, Sep 19, 2014 at 2:58 PM, <ruben.m...@swisscom.com> wrote:
Hello,
I have the following setup: a file source, a deinterleave block and a USRP sink
(see the attached .grc and related .png). This setup is a test to distribute
two different signals on two channels of the USRP x300 (the file source loads a
binary file with alternated channels containing 64 bit long IQ samples - 32
real followed by 32 imaginary - channel 1/channel 2/channel 1/channel 2/etc...).
The hardware is a USRP x300 with two wideband SBX (SBX-120) boards.
Now, the above setup used to function without a hitch. But recently, it
completely freezes gnuradio. Basically, I start the flowgraph and quickly get a
large number of 'L' and no signal is transmitted. The only thing I can do is
then to kill gnuradio-companion and related python processes.
The interesting thing is that if I replace the deinterleave block by a "stream to
streams" block, everything works fine. I am bit puzzled as to what I am missing.
The operating system is Ubuntu 14.04 LTS (updated state), UHD is the head of
the maint branch, and gnuradio as well (UHD_003.007.002-2-gdb35bf46 and
Gnuradio: 9dcb5067c55a0630c9edca6b62a32b1f8e633930). Firmware is also the most
recent. I have attached the .grc, and the binary file I am using can be
obtained here:
http://www.net.t-labs.tu-berlin.de/~ruben/files/sine_test_10kHz_20kHz_cpx_float_2chan_interleaved_1MSs.bin.
Assuming there is not something wrong in my .grc setup, how do I debug this
issue?
Thanks for any suggestion or help,
Ruben
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