Merged r9433:9527 from features/gr-usrp2 into trunk. Adds usrp2 and gr-usrp2 top-level components. Trunk passes distcheck with mb-gcc installed, but currently not without them. The key issue is that when mb-gcc is not installed, the build system skips over the usrp2/firmware directory, and the firmware include files don't get put into the dist tarball. But we can't do the usual DIST_SUBDIRS method as the firmware is a subpackage.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9528 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 146 insertions, 0 deletions

diff --git a/sdr_lib/dsp_core_rx.v b/sdr_lib/dsp_core_rx.v
new file mode 100644
index 000000000..a2569a1dc
--- /dev/null
+++ b/sdr_lib/dsp_core_rx.v
@@ -0,0 +1,146 @@
+
+`define DSP_CORE_RX_BASE 160
+module dsp_core_rx
+  (input clk, input rst,
+   input set_stb, input [7:0] set_addr, input [31:0] set_data,
+
+   input [13:0] adc_a, input adc_ovf_a,
+   input [13:0] adc_b, input adc_ovf_b,
+   
+   output [31:0] sample,
+   input run,
+   output strobe,
+   output [31:0] debug
+   );
+
+   wire [15:0] scale_i, scale_q;
+   wire [13:0] adc_a_ofs, adc_b_ofs;
+   reg [13:0] adc_i, adc_q;
+   wire [31:0] phase_inc;
+   reg [31:0]  phase;
+
+   wire [35:0] prod_i, prod_q;
+   wire [23:0] i_cordic, q_cordic;
+   wire [23:0] i_cic, q_cic;
+   wire [17:0] i_cic_scaled, q_cic_scaled;
+   wire [17:0] i_hb1, q_hb1;
+   wire [17:0] i_hb2, q_hb2;
+   wire [15:0] i_out, q_out;
+
+   wire        strobe_cic, strobe_hb1, strobe_hb2;
+   wire        enable_hb1, enable_hb2;
+   wire [7:0]  cic_decim_rate;
+   
+   setting_reg #(.my_addr(`DSP_CORE_RX_BASE+0)) sr_0
+     (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
+      .in(set_data),.out(phase_inc),.changed());
+   
+   setting_reg #(.my_addr(`DSP_CORE_RX_BASE+1)) sr_1
+     (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
+      .in(set_data),.out({scale_i,scale_q}),.changed());
+   
+   setting_reg #(.my_addr(`DSP_CORE_RX_BASE+2)) sr_2
+     (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
+      .in(set_data),.out({enable_hb1, enable_hb2, cic_decim_rate}),.changed());
+
+   rx_dcoffset #(.WIDTH(14),.ADDR(`DSP_CORE_RX_BASE+6)) rx_dcoffset_a
+     (.clk(clk),.rst(rst),.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
+      .adc_in(adc_a),.adc_out(adc_a_ofs));
+   
+   rx_dcoffset #(.WIDTH(14),.ADDR(`DSP_CORE_RX_BASE+7)) rx_dcoffset_b
+     (.clk(clk),.rst(rst),.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
+      .adc_in(adc_b),.adc_out(adc_b_ofs));
+
+   wire [3:0]  muxctrl;
+   setting_reg #(.my_addr(`DSP_CORE_RX_BASE+8)) sr_8
+     (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
+      .in(set_data),.out(muxctrl),.changed());
+
+   always @(posedge clk)
+     case(muxctrl[1:0])
+       0: adc_i <= adc_a_ofs;
+       1: adc_i <= adc_b_ofs;
+       2: adc_i <= 0;
+       default: adc_i <= 0;
+     endcase // case(muxctrl[1:0])
+          
+   always @(posedge clk)
+     case(muxctrl[3:2])
+       0: adc_q <= adc_b_ofs;
+       1: adc_q <= adc_a_ofs;
+       2: adc_q <= 0;
+       default: adc_q <= 0;
+     endcase // case(muxctrl[3:2])
+       
+   always @(posedge clk)
+     if(rst)
+       phase <= 0;
+     else if(run)
+       phase <= phase + phase_inc;
+
+   MULT18X18S mult_i
+     (.P(prod_i),    // 36-bit multiplier output
+      .A({{4{adc_i[13]}},adc_i} ),    // 18-bit multiplier input
+      .B({{2{scale_i[15]}},scale_i}),    // 18-bit multiplier input
+      .C(clk),    // Clock input
+      .CE(1),  // Clock enable input
+      .R(rst)     // Synchronous reset input
+      );
+
+   MULT18X18S mult_q
+     (.P(prod_q),    // 36-bit multiplier output
+      .A({{4{adc_q[13]}},adc_q} ),    // 18-bit multiplier input
+      .B({{2{scale_q[15]}},scale_q}),    // 18-bit multiplier input
+      .C(clk),    // Clock input
+      .CE(1),  // Clock enable input
+      .R(rst)     // Synchronous reset input
+      ); 
+
+   cordic #(.bitwidth(24))
+     cordic(.clock(clk), .reset(rst), .enable(run),
+	    .xi(prod_i[23:0]),. yi(prod_q[23:0]), .zi(phase[31:16]),
+	    .xo(i_cordic),.yo(q_cordic),.zo() );
+
+   cic_strober cic_strober(.clock(clk),.reset(rst),.enable(run),.rate(cic_decim_rate),
+			   .strobe_fast(1),.strobe_slow(strobe_cic) );
+
+   cic_decim #(.bw(24))
+     decim_i (.clock(clk),.reset(rst),.enable(run),
+	      .rate(cic_decim_rate),.strobe_in(1'b1),.strobe_out(strobe_cic),
+	      .signal_in(i_cordic),.signal_out(i_cic));
+   
+   cic_decim #(.bw(24))
+     decim_q (.clock(clk),.reset(rst),.enable(run),
+	      .rate(cic_decim_rate),.strobe_in(1'b1),.strobe_out(strobe_cic),
+	      .signal_in(q_cordic),.signal_out(q_cic));
+
+   round_reg #(.bits_in(24),.bits_out(18)) round_icic (.clk(clk),.in(i_cic),.out(i_cic_scaled));
+   round_reg #(.bits_in(24),.bits_out(18)) round_qcic (.clk(clk),.in(q_cic),.out(q_cic_scaled));
+   reg 	       strobe_cic_d1;
+   always @(posedge clk) strobe_cic_d1 <= strobe_cic;
+   
+   small_hb_dec #(.WIDTH(18)) small_hb_i
+     (.clk(clk),.rst(rst),.bypass(~enable_hb1),
+      .stb_in(strobe_cic_d1),.data_in(i_cic_scaled),.stb_out(strobe_hb1),.data_out(i_hb1));
+   
+   small_hb_dec #(.WIDTH(18)) small_hb_q
+     (.clk(clk),.rst(rst),.bypass(~enable_hb1),
+      .stb_in(strobe_cic_d1),.data_in(q_cic_scaled),.stb_out(),.data_out(q_hb1));
+
+   wire [8:0]  cpi_hb = enable_hb1 ? {cic_decim_rate,1'b0} : {1'b0,cic_decim_rate};
+   hb_dec #(.IWIDTH(18), .OWIDTH(18), .CWIDTH(18), .ACCWIDTH(24)) hb_i
+     (.clk(clk),.rst(rst),.bypass(~enable_hb2),.cpi(cpi_hb),
+      .stb_in(strobe_hb1),.data_in(i_hb1),.stb_out(strobe_hb2),.data_out(i_hb2));
+
+   hb_dec #(.IWIDTH(18), .OWIDTH(18), .CWIDTH(18), .ACCWIDTH(24)) hb_q
+     (.clk(clk),.rst(rst),.bypass(~enable_hb2),.cpi(cpi_hb),
+      .stb_in(strobe_hb1),.data_in(q_hb1),.stb_out(),.data_out(q_hb2));
+
+   round #(.bits_in(18),.bits_out(16)) round_iout (.in(i_hb2),.out(i_out));
+   round #(.bits_in(18),.bits_out(16)) round_qout (.in(q_hb2),.out(q_out));
+
+   assign      sample = {i_out,q_out};
+   assign      strobe = strobe_hb2;
+   assign      debug = {enable_hb1, enable_hb2, run, strobe, strobe_cic, strobe_cic_d1, strobe_hb1, strobe_hb2};
+   
+endmodule // dsp_core_rx