Using File Sink Block

GNU Radio
1

I am trying to save the output of a stream to a .txt file using the
gr_file_sink block. After running the flowgraph, the .txt file either
cannot be opened due to missing formatting information, or the file just
appears empty.

Is there a line I can add to the python script to make the file readable
in
a standard editor? Am I using the block wrong somehow?

Thanks in advance.

Steve Joseph

2

On 04/10/2011 01:39 AM, Steve Joseph wrote:

Steve Joseph

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The file sink writes native-binary formatted data–any conversion to
text would have to be done
post-facto.

3

I have been struggling to convert the output of the gr_file_sink block
into
a readable txt file. It seems that to do this I have to know the
formatting
details of how the gr_file_sink block writes the raw data (byte). If
anyone
is aware of the command(s) to make this raw output into a readable txt
document, I would really appreciate it.

Thanks in advance.

Steve Joseph

4

On 04/09/2011 10:39 PM, Steve Joseph wrote:

I am trying to save the output of a stream to a .txt file using the
gr_file_sink block. After running the flowgraph, the .txt file either
cannot be opened due to missing formatting information, or the file just
appears empty.

Is there a line I can add to the python script to make the file readable in
a standard editor? Am I using the block wrong somehow?

python -c “import numpy, sys; print ‘\n’.join(map(str,
numpy.fromfile(sys.argv[1], numpy.complex64)))” [input_file] >
[output_file]

substitute numpy.complex64 for the io type you are using

-Josh