RE: [Discuss-gnuradio] complex vector output of a block

[Sammour]

Thanks for everyone, I sorted the problem out. I needed to increment "out"
after memcpy and then return noutput_items/(N*N).

Cheers,
Sam

Sammour wrote:
> 
> 
> Hi John, Thanks for the message sorry for using MATLAB notation without
> clarification 2:12 = from 2 upto 12.
> 
> To simplify the case, I wrote the following code that actually carry the
> same problem concept:
> *****************************************************************************************************************
> #ifdef HAVE_CONFIG_H
> #include "config.h"
> #endif
> #include <arraycomms_construct_rxx_vcc.h>
> #include <gr_io_signature.h>
> 
> arraycomms_construct_rxx_vcc_sptr arraycomms_make_construct_rxx_vcc (int
> input_ports){
>   return arraycomms_construct_rxx_vcc_sptr (new
> arraycomms_construct_rxx_vcc (input_ports));
> }
> 
> unsigned int N=0;        // number of input ports
> 
> arraycomms_construct_rxx_vcc::arraycomms_construct_rxx_vcc (int
> num_input_ports)
>   : gr_sync_block ("construct_rxx_vcc",   gr_make_io_signature (2, 12,
> sizeof(gr_complex)),
>           gr_make_io_signature (1,1 ,
> num_input_ports*num_input_ports*sizeof(gr_complex))){
> 
>         N=num_input_ports;
> }
> 
> arraycomms_construct_rxx_vcc::~arraycomms_construct_rxx_vcc (){}
> 
> int arraycomms_construct_rxx_vcc::work (int noutput_items,
>     gr_vector_const_void_star &input_items,
>     gr_vector_void_star &output_items)
> {
>         gr_complex *out =(gr_complex *) output_items[0];
>         gr_complex out_vector [N*N];
>         const gr_complex *in[N];
>         for (unsigned int i = 0; i<N; i++)
>        {
>             in[i] = (const gr_complex *) input_items[i];
>         }
>        for (int i = 0; i < noutput_items; i++){
>             unsigned int index = 0;
>             for (unsigned int n =1; n<=N*N; n++){
>                     out_vector[index]=gr_complex(4, 0);
>                     index++;
>             }
>         }
>        memcpy(out, out_vector, N*N*sizeof(gr_complex));    
>     return noutput_items;
> }
> *********************************************************************************************
> 
> This code is supposed to generate a vector of 4 elements ( I used N=2 in
> the GRC) with each element = 4+j0 whatever the input is. However, the
> content of the sink file is:
>  4.0000000e+00
>    4.0000000e+00
>    4.0000000e+00
>    4.0000000e+00
>    0.0000000e+00
>    0.0000000e+00
>    0.0000000e+00
>    0.0000000e+00
>    0.0000000e+00
>    0.0000000e+00
> .....
>  4.0000000e+00
>    4.0000000e+00
>    4.0000000e+00
>    4.0000000e+00
>    0.0000000e+00
>    0.0000000e+00
>    0.0000000e+00
>    0.0000000e+00
>    0.0000000e+00
>    0.0000000e+00
> 
>  I hope the situation is now clearer.
> 
> Cheers,
> Sam
> 
>> To: address@hidden; address@hidden
>> Subject: Re: [Discuss-gnuradio] complex vector output of a block 
>> Date: Wed, 9 Jun 2010 16:49:15 -0700
>> From: address@hidden
>> 
>> > Thanks for replying. N is designed to be 2:12. 
>> 
>> Maybe others understand what you're saying, but 2:12 doesn't mean
>> anything
>> to me.  Do you mean "between 2 and 12"?  Or is this a Biblical reference,
>> or perhaps the time of day?
>> 
>> I suggest that you just post the code that's giving you the trouble
>> (either in an email, or if it's more than about 200 lines, put it on
>> a web site or pastebin or wiki and email a URL for it).  Trying to
>> debug somebody else's code piecemeal by asking little questions is
>> unlikely to lead to success.
>> 
>>      John
>                                         
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