[Discuss-gnuradio] How to get FPGA_MODE_LOOPBACK in usrp2

[srinivas naga vutukuri]

Hi,

Am using usrp2, and using gnuradio-3.2.2 stable version, compiled with 
only --enable-usrp2 option. While reading the code, i observed in the 
usrp, usrp_standard_rx::usrp_standard_rx(), the mode as a parameter, and 
using the member shown below. I want to try similar kind of feature in 
the usrp2, want to write small example that transmit the samples, and 
the same samples loopbacks and receives at the receiver. Please can show 
some examples where to look at.

best regards,
srinivas.

=========================================
bool
usrp_standard_rx::set_fpga_mode (int mode)
{
 return _write_fpga_reg (FR_MODE, mode);
}
=========================================