Simplifyinf bin2gray interface

- Using gray/bin as inputs was cute, but not useful when actually instantiating and reading the code. in/out works better.

src/common/hdl/oh_bin2gray.v

@@ -8,12 +8,17 @@
 module oh_bin2gray #(parameter DW = 32 // width of data inputs
 		     ) 
    (
-    input [DW-1:0]  bin, //binary encoded input
+    input [DW-1:0]  in, //binary encoded input
-    output [DW-1:0] gray //gray encoded output
+    output [DW-1:0] out //gray encoded output
     );
    
-   reg [DW-1:0]    gray;
+   reg [DW-1:0]    gray; 
+   wire [DW-1:0]   bin;
+
    integer 	   i;   
+
+   assign bin[DW-1:0]  = in[DW-1:0];
+   assign out[DW-1:0]  = gray[DW-1:0];
   
    always @*
      begin

src/common/hdl/oh_gray2bin.v

@@ -7,13 +7,18 @@
 
 module oh_gray2bin #(parameter DW = 32) // width of data inputs
    (
-    input [DW-1:0]  gray,//gray encoded input
+    input [DW-1:0]  in,  //gray encoded input
-    output [DW-1:0] bin  //binary encoded output
+    output [DW-1:0] out  //binary encoded output
     );
    
-   reg [DW-1:0]     bin;   
+   reg [DW-1:0]     bin;
+   wire [DW-1:0]    gray;
+   
    integer 	   i,j;
 
+   assign gray[DW-1:0] = in[DW-1:0];
+   assign out[DW-1:0]  = bin[DW-1:0];
+
    always @*
      begin
 	bin[DW-1] = gray[DW-1];   
@@ -24,7 +29,7 @@ module oh_gray2bin #(parameter DW = 32) // width of data inputs
 	       bin[i] = bin[i] ^ gray [j];
 	  end
      end
-   
+
 endmodule // oh_gray2bin