diff options
Diffstat (limited to 'usrp2/sdr_lib/ddc_chain.v')
| -rw-r--r-- | usrp2/sdr_lib/ddc_chain.v | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/usrp2/sdr_lib/ddc_chain.v b/usrp2/sdr_lib/ddc_chain.v index 02544a0fe..86ff2001b 100644 --- a/usrp2/sdr_lib/ddc_chain.v +++ b/usrp2/sdr_lib/ddc_chain.v @@ -18,9 +18,10 @@ //! The USRP digital down-conversion chain module ddc_chain - #(parameter BASE = 0) + #(parameter BASE = 0, parameter DSPNO = 0) (input clk, input rst, input set_stb, input [7:0] set_addr, input [31:0] set_data, + input set_stb_user, input [7:0] set_addr_user, input [31:0] set_data_user, // From RX frontend input [23:0] rx_fe_i, @@ -91,10 +92,12 @@ module ddc_chain else phase <= phase + phase_inc; + wire [23:0] to_cordic_i, to_cordic_q; + // CORDIC 24-bit I/O cordic_z24 #(.bitwidth(25)) cordic(.clock(clk), .reset(rst), .enable(run), - .xi({rx_fe_i_mux[23],rx_fe_i_mux}),. yi({rx_fe_q_mux[23],rx_fe_q_mux}), .zi(phase[31:8]), + .xi({to_cordic_i[23],to_cordic_i}),. yi({to_cordic_q[23],to_cordic_q}), .zi(phase[31:8]), .xo(i_cordic),.yo(q_cordic),.zo() ); clip_reg #(.bits_in(25), .bits_out(24)) clip_i @@ -136,12 +139,22 @@ module ddc_chain .stb_in(strobe_hb1),.data_in(q_hb1),.stb_out(),.data_out(q_hb2)); // Round final answer to 16 bits + wire [31:0] ddc_chain_out; + wire ddc_chain_stb; round_sd #(.WIDTH_IN(24),.WIDTH_OUT(16)) round_i - (.clk(clk),.reset(rst), .in(i_hb2),.strobe_in(strobe_hb2), .out(sample[31:16]), .strobe_out(strobe)); + (.clk(clk),.reset(rst), .in(i_hb2),.strobe_in(strobe_hb2), .out(ddc_chain_out[31:16]), .strobe_out(ddc_chain_stb)); round_sd #(.WIDTH_IN(24),.WIDTH_OUT(16)) round_q - (.clk(clk),.reset(rst), .in(q_hb2),.strobe_in(strobe_hb2), .out(sample[15:0]), .strobe_out()); - + (.clk(clk),.reset(rst), .in(q_hb2),.strobe_in(strobe_hb2), .out(ddc_chain_out[15:0]), .strobe_out()); + + custom_dsp_rx #(.DSPNO(DSPNO)) custom( + .clock(clk), .reset(rst), .enable(run), + .set_stb(set_stb_user), .set_addr(set_addr_user), .set_data(set_data_user), + .frontend_i(rx_fe_i_mux), .frontend_q(rx_fe_q_mux), + .ddc_in_i(to_cordic_i), .ddc_in_q(to_cordic_q), + .ddc_out_sample(ddc_chain_out), .ddc_out_strobe(ddc_chain_stb), + .bb_sample(sample), .bb_strobe(strobe)); + assign debug = {enable_hb1, enable_hb2, run, strobe, strobe_cic, strobe_hb1, strobe_hb2}; endmodule // ddc_chain |