We have been studying for a while Blade's schematics. Our goal is to modify the fpga in order to implement the inner receiver of an OFDM demodulator. The idea is to then connect the output to a .grc in GNURadio to continue processing the signal.
We are interested in finding a way to provide a repetitive input to the fpga, a known signal to which we know what to expect in the output of each block we will implement.
We found in the bladder-hosted.vhd what appears to be a configuration of digital loopback of the FPGA. We think this could be exactly what we need in order to test our system.
Code: Select all
Line 78: type rx_mux_mode_t is (RX_MUX_NORMAL, RX_MUX_12BIT_COUNTER, RX_MUX_32BIT_COUNTER, RX_MUX_ENTROPY, RX_MUX_DIGITAL_LOOPBACK) ;
Has anyone tried using the digital loopback? We are not sure if it's implemented since it appears in the Tasks' list: https://github.com/Nuand/bladeRF/wiki/Tasks .
Does anyone know another way to provide a repetitive input to our circuit?
Thanks in advance.
Florencia