Pushing the bulk of UHD-3.7.0 code.

Original-commit: ff1546f8137f7f92bb250f685561b0c34cc0e053

lib/dsp/ddc_chain_x300_tb.v

@@ -0,0 +1,58 @@
+`timescale 1ns/1ps
+
+module ddc_chain_x300_tb();
+   
+`ifdef ISIM
+`else //iverilog implied.
+//   xlnx_glbl glbl (.GSR(),.GTS());
+`endif
+   
+   localparam SR_TX_DSP        = 8;
+
+   reg clk    = 0;
+   reg reset  = 1;
+   
+   always #10 clk = ~clk;
+   
+   initial $dumpfile("ddc_chain_x300_tb.vcd");
+   initial $dumpvars(0,ddc_chain_x300_tb);
+   reg run = 0;
+   wire strobe;
+   
+   initial
+     begin
+	#1000 reset = 0;
+	@(posedge clk);
+	set_addr <= 0; set_data <= 32'd8434349; set_stb <= 1; @(posedge clk); // CORDIC
+	set_addr <= 1; set_data <= 18'd19800; set_stb <= 1; @(posedge clk); // Scale factor
+	set_addr <= 2; set_data <= 10'h003; set_stb <= 1; @(posedge clk); // Decim control
+	set_addr <= 3; set_data <= 0; set_stb <= 1; @(posedge clk); // Swap iq
+	set_addr <= 4; set_data <= 0; set_stb <= 1; @(posedge clk); // filter taps
+	set_stb <= 0;
+		
+	repeat(10)
+	  @(posedge clk);
+	run <= 1'b1;
+	#30000;
+	$finish;
+     end
+   
+   reg [7:0]   set_addr;
+   reg [31:0]  set_data;
+   reg 	       set_stb = 1'b0;
+
+   wire [15:0] i_out, q_out;
+   wire [23:0] rx_fe_i, rx_fe_q;
+
+   assign rx_fe_i = 24'd8388607;
+   assign rx_fe_q = 24'd8388607;
+   //assign rx_fe_q = 0;
+   
+   ddc_chain_x300 #(.BASE(0), .DSPNO(0), .WIDTH(24)) ddc_chain
+     (.clk(clk), .rst(reset), .clr(1'b0),
+      .set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
+      .rx_fe_i(rx_fe_i),.rx_fe_q(rx_fe_q),
+      .sample({i_out,q_out}), .run(run), .strobe(strobe),
+      .debug() );
+   
+endmodule // new_tx_tb