dsp: testbenches for dsp blocks

1 files changed, 45 insertions, 0 deletions

diff --git a/usrp2/sdr_lib/rx_frontend_tb.v b/usrp2/sdr_lib/rx_frontend_tb.v
new file mode 100644
index 000000000..487b72687
--- /dev/null
+++ b/usrp2/sdr_lib/rx_frontend_tb.v
@@ -0,0 +1,45 @@
+
+`timescale 1ns/1ns
+module rx_frontend_tb();
+   
+   reg clk, rst;
+
+   initial rst = 1;
+   initial #1000 rst = 0;
+   initial clk = 0;
+   always #5 clk = ~clk;
+   
+   initial $dumpfile("rx_frontend_tb.vcd");
+   initial $dumpvars(0,rx_frontend_tb);
+
+   reg [15:0] adc_in;
+   wire [17:0] adc_out;
+
+   always @(posedge clk)
+     begin
+	if(adc_in[13])
+	  $write("-%d,",-adc_in);
+	else
+	  $write("%d,",adc_in);
+	if(adc_out[13])
+	  $write("-%d\n",-adc_out);
+	else
+	  $write("%d\n",adc_out);
+     end	
+   
+   rx_frontend #(.BASE(0)) rx_frontend
+     (.clk(clk),.rst(rst),
+      .set_stb(0),.set_addr(0),.set_data(0),
+      .adc_a(adc_in), .adc_ovf_a(0),
+      .adc_b(0), .adc_ovf_b(0),
+      .i_out(adc_out),.q_out(),
+      .run(), .debug());
+
+   always @(posedge clk)
+     if(rst)
+       adc_in <= 0;
+     else
+       adc_in <= adc_in + 4;
+   //adc_in <= (($random % 473) + 23)/4;
+   
+endmodule // rx_frontend_tb