Correction> These functions work on integers. So they go as: int16 data = htobe16(le32toh(int32 data)) Or the associate functions, htonl, htons
So you need to already have converted your floats to ints... If in doubt, test them first on a single data... Sorry about the confusion. Nikos On Sat, Jul 9, 2022 at 5:36 PM Nikos Balkanas <nbalka...@gmail.com> wrote: > > Hi, > > I don't know about gnuradio classes:( Maybe you should ask them... > But in C, I would use le32toh, I assume gnuradio is in little endian. > and then htobe16 to get for uhd: > uint16 data = htobe16(le32toh(float 32 data)) > I assume this already does ceil or floor, so your data needs to be > already in the right scale:) > > HTH > Nikos > > On Sat, Jul 9, 2022 at 4:57 PM sp <stackprogra...@gmail.com> wrote: > > > > I know that data in USRP on FPGA is in format big-endian sint16, but in > > Gnuradio data is in format complex float 32... > > I found these links > > The conversion encompasses several elements. The most obvious is that of > > the data type: Most FPGAs use integer data types, the most common being > > complex 16-bit integers (16 bit for I and Q, respectively). If the user > > wants his data in float, the converter casts the data type and also scales > > the data, typically such that the full dynamic range of the 16-Bit integers > > is mapped onto the float range of -1 to 1. The converter also handles the > > endianness: On the network, data is usually stored as big-endian, whereas > > most platforms store data internally as little-endian. > > > > https://files.ettus.com/manual/classuhd_1_1convert_1_1converter.html#a371906249b8bd546b98bd0a867e70c88 > > https://files.ettus.com/manual/page_converters.html > > > > According to them, I want to use the Convert class to convert complex float > > 32 to sint16.... > > But my program is can not run successfully, Anyone can guide me on How > > should I use the Converter class...!!! > > Thanks in advance > > > >> #include <uhd/convert.hpp> > > > > > > > >> > >> int main() > >> > >> { > >> > >> int16_t *in_p; > >> > >> float *out_p; > >> > >> *in_p=1234; > >> > >> uhd::convert::converter::input_type in(in_p); > >> > >> uhd::convert::converter::output_type out(out_p); > >> > >> uhd::convert::converter::sptr convert; > >> > >> convert->conv(in,out,1); > >> > >> std::cout<<*out_p; > >> > >> } > > > > > > _______________________________________________ > > USRP-users mailing list -- usrp-users@lists.ettus.com > > To unsubscribe send an email to usrp-users-le...@lists.ettus.com _______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com To unsubscribe send an email to usrp-users-le...@lists.ettus.com
