Re: [Discuss-gnuradio] How to instantiate uhd usrp sink in C++

[Josh Blum]

On 05/13/2011 03:33 PM, address@hidden wrote:
> Hello again,
> 
> I am having trouble setting the io_type to the uhd_make_usrp_sink function.
> This is likely due to my unfamiliarity with C++.
> 
> The error printed on the screen:
> "terminate called after throwing an instance of 'std::invalid_argument'
>   what(): itemsize mismatch: sig_source_c(1):0 using 8, gr uhd usrp
> sink(2):0 using 2
> Aborted"
> 
> I am connecting the uhd_usrp_sink to a sig_source_c. Here is the troublesome
> code that I use to setup the uhd_usrp_sink:
> uhd::device_addr_t addr; //I assume this defaults to ""
> uhd::io_type_t type(2); //I want this to be COMPLEX_FLOAT32, but don't know

Well thats the problem, there is no enum w/ value 2. Use one of the
build-in enums:
http://www.ettus.com/uhd_docs/doxygen/html/classuhd_1_1io__type__t.html

Also, you can pass uhd::io_type_t::COMPLEX_FLOAT32 directly as the
second argument.

-josh