Hi,
I am trying to utilize the digital loopback to check transmitted signal before
DAC in my E312. May I know what is the C++ command to enable the digital
loopback? How to set the SR_LOOPBACK register? In the radio.v, it says,
// Set this register to loop TX data directly to RX data.
setting_reg #(.my_addr(SR_LOOPBACK), .awidth(8), .width(1)) sr_loopback
(.clk(radio_clk), .rst(radio_rst), .strobe(set_stb), .addr(set_addr),
.in(set_data),
.out(loopback), .changed());
......
// Digital Loopback TX -> RX (Pipeline immediately inside rx_frontend).
wire [31:0] rx_fe = loopback ? tx : rx;
I know it is possible to change FPGA code to achieve digital loopback. But it
will be handy if I can set it in controlling computer. I cannot find any clue
in txrx_loopback_to_file.cpp. I think it is used for looping back analog
waveforms. Thank you.
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