1//
2// Copyright 2011 Ettus Research LLC
3//
4// This program is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// This program is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13//
14// You should have received a copy of the GNU General Public License
15// along with this program.  If not, see <http://www.gnu.org/licenses/>.
16//
17
18
19
20module ram_2port
21  #(parameter DWIDTH=32,
22    parameter AWIDTH=9)
23    (input clka,
24     input ena,
25     input wea,
26     input [AWIDTH-1:0] addra,
27     input [DWIDTH-1:0] dia,
28     output reg [DWIDTH-1:0] doa,
29
30     input clkb,
31     input enb,
32     input web,
33     input [AWIDTH-1:0] addrb,
34     input [DWIDTH-1:0] dib,
35     output reg [DWIDTH-1:0] dob);
36
37   reg [DWIDTH-1:0] ram [(1<<AWIDTH)-1:0];
38   integer 	    i;
39   initial
40     for(i=0;i<(1<<AWIDTH);i=i+1)
41       ram[i] <= {DWIDTH{1'b0}};
42
43   always @(posedge clka) begin
44      if (ena)
45        begin
46           if (wea)
47             ram[addra] <= dia;
48           doa <= ram[addra];
49        end
50   end
51   always @(posedge clkb) begin
52      if (enb)
53        begin
54           if (web)
55             ram[addrb] <= dib;
56           dob <= ram[addrb];
57        end
58   end
59endmodule // ram_2port
60