Re: [Discuss-gnuradio] Adding command port to OFDM Allocator Block

[Marcus Müller]

Hi,

did you add the message port to the .xml file describing the block in python?

Greetings,

Marcus

On 05.04.2017 00:41, Qurat-Ul-Ann Akbar wrote:

Hi,

I am trying to add a command port to the OFDM Allocator block in GNURadio. The goal is for this command port to take a message every 1 ms to change the amplitude of the complex pilot symbols. However, I can not see the port appearing in GRC.

I just wrote some test code to see if the port is appearing. The changes I made are given below:

1) I added this line here:

 ofdm_carrier_allocator_cvc_impl::ofdm_carrier_allocator_cvc_impl

{int fft_len,

 const std::vector<std::vector<int> > &occupied_carriers,

 const std::vector<std::vector<int> > &pilot_carriers,

 const std::vector<std::vector<gr_complex> > &pilot_symbols,

 const std::vector<std::vector<gr_complex> > &sync_words,

 const std::string &len_tag_key,

 const bool output_is_shifted

    ) : tagged_stream_block("ofdm_carrier_allocator_cvc",

  io_signature::make(1, 1, sizeof (gr_complex)),

  io_signature::make(1, 1, sizeof (gr_complex) * fft_len), len_tag_key),

d_fft_len(fft_len),

d_occupied_carriers(occupied_carriers),

d_pilot_carriers(pilot_carriers),

d_pilot_symbols(pilot_symbols),

d_sync_words(sync_words),

d_symbols_per_set(0),

d_output_is_shifted(output_is_shifted)

{

   //MY_CHANGES

    message_port_register_in(pmt::mp("test"));

    set_msg_handler(pmt::mp("test"), boost::bind(&mac_impl::test_in, this, _1));

2) And then the function test_in is just a function printing out the message "TESTER"

//MY_CHANGES

void test_in (pmt::pmt_t msg) {

// this must be a pair

int count = 0;

if (!pmt::is_blob(pmt::cdr(msg))) {

throw std::runtime_error("PMT must be blob");

}

if(pmt::is_symbol(msg)) {

throw std::runtime_error("#############TESTER#########");

}

}

3) I uninstalled everything and built again. But I cant see anything in the block. I don't see this port at the input of the block.

Can anyone please tell me what am I doing wrong ?

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