Hi Jerrid, Your attempt at using structures to map to a complex type is sensible, but it appears that GRC doesn't parse this very well for at least the embedded python blocks. The UHD blocks are c++ based which just uses the io_signature object in the constructor which specifies a size, not a type.
You may want to try just using non-vectored int16's as an interleaved stream and deinterleave in your python block Josh On Thu, Jul 22, 2021 at 7:21 PM Jerrid Plymale <jerrid.plym...@canyon-us.com> wrote: > Hello All, > > > > I am trying to write a python block that will convert shorts to complex > int16, and I am having some difficulties. I have a need for this block so > that I can read int16 data from a file using the file source block, and > then transmit that data to a USRP X310 using a UHD USRP sink using complex > int16 input type. > > > > The problem I am having is being able to set out_sig within the block init > to a numpy dtype representation of complex int16. I tried using the > following: np.dtype([(‘re’, np.int16), (‘im’, np.int16)]). I get the > following error when using this: Can’t map dtype([(‘re’, ‘<i2’), (‘im’, > ’<i2’)]) to GRC port type. > > > > Does anyone know of a way to set the out_sig in a python block to a > complex int16 type that will map to the complex int16 GRC port type? I > figure this must be doable if the UHD USRP blocks have complex int16 GRC > port types. > > > > Best Regards, > > Jerrid >
