dsp: option to remove iq compensation at compile time

1 files changed, 40 insertions, 35 deletions

diff --git a/usrp2/sdr_lib/rx_frontend.v b/usrp2/sdr_lib/rx_frontend.v
index 04b14787e..edfbe62df 100644
--- a/usrp2/sdr_lib/rx_frontend.v
+++ b/usrp2/sdr_lib/rx_frontend.v
@@ -1,6 +1,7 @@
 
 module rx_frontend
-  #(parameter BASE = 0)
+  #(parameter BASE = 0,
+    parameter IQCOMP_EN = 0)
    (input clk, input rst,
     input set_stb, input [7:0] set_addr, input [31:0] set_data,
 
@@ -16,7 +17,6 @@ module rx_frontend
    wire [17:0] 	  adc_i_ofs, adc_q_ofs;
    wire [35:0] 	  corr_i, corr_q; wire [17:0] 	  mag_corr,phase_corr;
    wire 	  swap_iq;
-   wire [23:0] 	  i_final, q_final;
    
    setting_reg #(.my_addr(BASE), .width(1)) sr_8
      (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
@@ -35,39 +35,44 @@ module rx_frontend
    setting_reg #(.my_addr(BASE+2),.width(18)) sr_2
      (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
       .in(set_data),.out(phase_corr),.changed());
-   
-   rx_dcoffset #(.WIDTH(18),.ADDR(BASE+3)) rx_dcoffset_i
-     (.clk(clk),.rst(rst),.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
-      .in({adc_i,2'b00}),.out(adc_i_ofs));
-   
-   rx_dcoffset #(.WIDTH(18),.ADDR(BASE+4)) rx_dcoffset_q
-     (.clk(clk),.rst(rst),.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
-      .in({adc_q,2'b00}),.out(adc_q_ofs));
-   
-   MULT18X18S mult_mag_corr
-     (.P(corr_i), .A(adc_i_ofs), .B(mag_corr), .C(clk), .CE(1), .R(rst) ); 
 
-   MULT18X18S mult_phase_corr
-     (.P(corr_q), .A(adc_i_ofs), .B(phase_corr), .C(clk), .CE(1), .R(rst) );
-   
-   add2_and_clip_reg #(.WIDTH(24)) add_clip_i
-     (.clk(clk), .rst(rst), 
-      .in1({adc_i_ofs,6'd0}), .in2({{4{corr_i[35]}},corr_i[35:16]}), .strobe_in(1'b1), 
-      .sum(i_final), .strobe_out());
-   
-   add2_and_clip_reg #(.WIDTH(24)) add_clip_q
-     (.clk(clk), .rst(rst), 
-      .in1({adc_q_ofs,6'd0}), .in2({{4{corr_q[35]}},corr_q[35:16]}), .strobe_in(1'b1),
-      .sum(q_final), .strobe_out());
-
-   assign i_out = i_final;
-   assign q_out = q_final;
-   
-   /*
-   round_sd #(.WIDTH_IN(24),.WIDTH_OUT(18)) round_i
-     (.clk(clk), .reset(rst), .in(i_final), .strobe_in(1'b1), .out(i_out), .strobe_out());
+   generate
+      if(IQCOMP_EN == 1)
+	begin
+	   rx_dcoffset #(.WIDTH(18),.ADDR(BASE+3)) rx_dcoffset_i
+	     (.clk(clk),.rst(rst),.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
+	      .in({adc_i,2'b00}),.out(adc_i_ofs));
+	   
+	   rx_dcoffset #(.WIDTH(18),.ADDR(BASE+4)) rx_dcoffset_q
+	     (.clk(clk),.rst(rst),.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
+	      .in({adc_q,2'b00}),.out(adc_q_ofs));
+	   
+	   MULT18X18S mult_mag_corr
+	     (.P(corr_i), .A(adc_i_ofs), .B(mag_corr), .C(clk), .CE(1), .R(rst) ); 
+	   
+	   MULT18X18S mult_phase_corr
+	     (.P(corr_q), .A(adc_i_ofs), .B(phase_corr), .C(clk), .CE(1), .R(rst) );
+	   
+	   add2_and_clip_reg #(.WIDTH(24)) add_clip_i
+	     (.clk(clk), .rst(rst), 
+	      .in1({adc_i_ofs,6'd0}), .in2({{4{corr_i[35]}},corr_i[35:16]}), .strobe_in(1'b1), 
+	      .sum(i_out), .strobe_out());
+	   
+	   add2_and_clip_reg #(.WIDTH(24)) add_clip_q
+	     (.clk(clk), .rst(rst), 
+	      .in1({adc_q_ofs,6'd0}), .in2({{4{corr_q[35]}},corr_q[35:16]}), .strobe_in(1'b1),
+	      .sum(q_out), .strobe_out());
+	end // if (IQCOMP_EN == 1)
+      else
+	begin
+	   rx_dcoffset #(.WIDTH(24),.ADDR(BASE+3)) rx_dcoffset_i
+	     (.clk(clk),.rst(rst),.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
+	      .in({adc_i,8'b00}),.out(i_out));
+	   
+	   rx_dcoffset #(.WIDTH(24),.ADDR(BASE+4)) rx_dcoffset_q
+	     (.clk(clk),.rst(rst),.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
+	      .in({adc_q,8'b00}),.out(q_out));
+	end // else: !if(IQCOMP_EN == 1)
+      endgenerate
    
-   round_sd #(.WIDTH_IN(24),.WIDTH_OUT(18)) round_q
-     (.clk(clk), .reset(rst), .in(q_final), .strobe_in(1'b1), .out(q_out), .strobe_out());
-   */
 endmodule // rx_frontend