Digital Loopback
Posted: Tue Sep 15, 2015 12:55 pm
Hi,
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.
We have tried modifying the GPIO's value in the BladeRF-CLI in order to activate the digital loopback configuration with no success.
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
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