[Commit-gnuradio] r8423 - usrp2/trunk/fpga/sdr_lib

[matt]

Author: matt
Date: 2008-05-13 20:48:28 -0600 (Tue, 13 May 2008)
New Revision: 8423

Added:
   usrp2/trunk/fpga/sdr_lib/add2.v
   usrp2/trunk/fpga/sdr_lib/add2_reg.v
Log:
small blocks for addingin dsp functions


Added: usrp2/trunk/fpga/sdr_lib/add2.v
===================================================================
--- usrp2/trunk/fpga/sdr_lib/add2.v                             (rev 0)
+++ usrp2/trunk/fpga/sdr_lib/add2.v     2008-05-14 02:48:28 UTC (rev 8423)
@@ -0,0 +1,11 @@
+
+module add2
+  #(parameter WIDTH=16)
+    (input [WIDTH-1:0] in1,
+     input [WIDTH-1:0] in2,
+     output [WIDTH-1:0] sum);
+
+   wire [WIDTH:0]      sum_int = {in1[WIDTH-1],in1} + {in2[WIDTH-1],in2};
+   assign              sum = sum_int[WIDTH:1];  // Note -- will have some bias
+   
+endmodule // add2

Added: usrp2/trunk/fpga/sdr_lib/add2_reg.v
===================================================================
--- usrp2/trunk/fpga/sdr_lib/add2_reg.v                         (rev 0)
+++ usrp2/trunk/fpga/sdr_lib/add2_reg.v 2008-05-14 02:48:28 UTC (rev 8423)
@@ -0,0 +1,17 @@
+
+module add2_reg
+  #(parameter WIDTH=16)
+    (input clk,
+     input [WIDTH-1:0] in1,
+     input [WIDTH-1:0] in2,
+     output reg [WIDTH-1:0] sum);
+
+   wire [WIDTH-1:0] sum_int;
+   
+   add2 #(.WIDTH(WIDTH)) add2 (.in1(in1),.in2(in2),.sum(sum_int));
+
+   always @(posedge clk)
+     sum <= sum_int;
+   
+endmodule // add2_reg
+