Re: [Discuss-gnuradio] Help with gr::io_signature::makev

[sumit kumar]

Yes indeed, it was a C++11 issue! Thanks 

On 13 January 2018 at 11:16, Sakthivel Velumani <address@hidden> wrote:

I think you are using an older standard of C compiler. The C11 does not allow to initialise a vector using {}. But this doesn't matter as it compiled successfully. Try initialising the vector with its constructor and then assign the values. It doesn't make sense but still no harm in trying.

Regards,

Sakthivel

On 13-Jan-2018 5:48 AM, "sumit kumar" <address@hidden> wrote:

The input signature is not a problem here. For gr::io_signature::make(2, 2, sizeof(gr_complex)), i.e. when using make, size of all input items is same. Its is different when using make2, make3 and makev. 

On 13 January 2018 at 01:23, Sakthivel Velumani <address@hidden> wrote:

Hi Sumit,

You have given no of input streams as 2 but mentioned size of item for only one. This may be the source of the error. Try correcting it and let us know.

Regards,

Sakthivel

On Fri, Jan 12, 2018 at 10:37 PM, sumit kumar <address@hidden> wrote:

Hi, 

I am trying to use gr::io_signature::makev for my output signature in my bar_impl.cc

    bar_impl::bar_impl(int offset, int freq)

      : gr::block("bar",

              gr::io_signature::make(2, 2, sizeof(gr_complex)),

              gr::io_signature::makev(4, 4, out_vect))

For that in the header I did following in the header bar_impl.h

const std::vector<int> out_vect = {sizeof(gr_complex), sizeof(gr_complex), sizeof(float), sizeof(float)};

It compiles but when I do gr_modtool makexml, it throws this error 

address@hidden:~/nuradio/src/gr-fist$ gr_modtool makexml bar 

GNU Radio module name identified: fist

Warning: This is an experimental feature. Don't expect any magic.

Searching for matching files in lib/:

Making GRC bindings for lib/bar_impl.cc...

tbi

Error: Can't parse output signature.

Traceback (most recent call last):

  File "/home/john/nuradio/bin/gr_modtool", line 46, in <module>

    main()

  File "/home/john/nuradio/bin/gr_modtool", line 38, in main

    modtool.run()

  File "/home/john/nuradio/lib/python2.7/dist-packages/gnuradio/modtool/modtool_makexml.py", line 76, in run

    self._make_grc_xml_from_block_data(params, iosig, blockname)

  File "/home/john/nuradio/lib/python2.7/dist-packages/gnuradio/modtool/modtool_makexml.py", line 100, in _make_grc_xml_from_block_data

    if iosig[inout]['max_ports'] == '-1':

KeyError: 'out'

Need some help :) 

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Sumit Kumar

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Sumit Kumar

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Sumit Kumar