UHD read_gpio() help

Hello,

I am trying call the read_gpio() function from the dboard_iface class in
a
c++ program that I have written. I have studied the .cpp files located
in
the host/examples directory in order to accomplish this. In these
examples,
they call uhd::usrp::multi_usrp::sptr usrp =
uhd::usrp::multi_usrp::make(args), and I am able to use the read_gpio()
by
using get_rx_dboard_iface(). I was wondering if anyone could give me any
advise on how I can call read_gpio() without having to use make(args) in
multi_usrp. I would greatly appreciate any help that anyone could give
me.
Thank you.

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The make function is what creates your USRP object. You cannot execute
functions on your USRP without constructing the object.

Cheers,
Ben