Ah, so it's a uniform vector of _u_signed _8_bit integers. Try pmt::u8vector_ref(VECT, k), where k is the index of the element you want to get. To modify, use pmt::u8vector_set(pmt_t, index,value).
Since your pmt is really just a wrapper around memory-contiguous uint8_ts , you can also "cheat" and directly use the uint8_t* pmt::u8vector_writable_elements(pmt_t v, size_t & len) method, that will give you a C-array/pointer to the first element. All these functions are described on https://gnuradio.org/doc/doxygen/namespacepmt.html#a73605a64c44ec7f12f5f84bb98e2cae3 as linked from the page I mentioned below. Best regards, Marcus On 06.01.2016 17:13, Gabriel Pechiarovich wrote: > I'm using message strobe to send the data in the Message PMt parameter > I used: > > pmt.cons(pmt.make_dict(), pmt.make_u8vector(8,0x42 )) > > then comes my block, and to read the output i'm using Message Debug block. > > > > 2016-01-06 10:55 GMT-05:00 Marcus Müller <marcus.muel...@ettus.com > <mailto:marcus.muel...@ettus.com>>: > > Hi Gabriel, > > do you know what kind of PMT VECT is? pmt_t is a container, and > might contain a lot of different things. > Is it a pmt::vector, or a pmt::uniform_vector, or a list, or > something else? > > For an overview, I'd like to point you to the polymorphic types > page in the GNU Radio manual [1]. > > Best regards, > Marcus > > [1] https://gnuradio.org/doc/doxygen/page_pmt.html > > > On 06.01.2016 16:10, Gabriel Pechiarovich wrote: >> Hi, I've been working in oot modules in gnuradio for a while, but >> recently I've been trying to program blocks who can handle messages. >> >> I've extracted the input data and replicated it at the output, >> like this: >> >> pmt::pmt_t META = pmt::car(PDU); >> pmt::pmt_t VECT = pmt::cdr(PDU); >> std::cout << "Vect: " << VECT<< '\n'; >> message_port_pub(pmt::mp("out_pdu"), pmt::cons(META, VECT)); >> >> But I can't understand how to handle VECT, I want to change the >> VECT values; add some values, basicaly operate this VECT. >> >> If anyone can help me I'll be gratefull. >> >> -- >> Gabriel Pechiarovich Salas >> >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org> >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > -- > Gabriel Pechiarovich Salas > Red Dragon Games > Designers and game developers
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