aboutsummaryrefslogtreecommitdiffstats
path: root/tests/arch/common/blockram.v
blob: 5ed0736d01b71444d47aedb3d23f638cfd545cea (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
`default_nettype none
module sync_ram_sp #(parameter DATA_WIDTH=8, ADDRESS_WIDTH=10)
   (input  wire                      write_enable, clk,
    input  wire  [DATA_WIDTH-1:0]    data_in,
    input  wire  [ADDRESS_WIDTH-1:0] address_in,
    output wire  [DATA_WIDTH-1:0]    data_out);

  localparam WORD  = (DATA_WIDTH-1);
  localparam DEPTH = (2**ADDRESS_WIDTH-1);

  reg [WORD:0] data_out_r;
  reg [WORD:0] memory [0:DEPTH];

  always @(posedge clk) begin
    if (write_enable)
      memory[address_in] <= data_in;
    data_out_r <= memory[address_in];
  end

  assign data_out = data_out_r;

endmodule // sync_ram_sp


`default_nettype none
module sync_ram_sdp #(parameter DATA_WIDTH=8, ADDRESS_WIDTH=10)
   (input  wire                      clk, write_enable,
    input  wire  [DATA_WIDTH-1:0]    data_in,
    input  wire  [ADDRESS_WIDTH-1:0] address_in_r, address_in_w,
    output wire  [DATA_WIDTH-1:0]    data_out);

  localparam WORD  = (DATA_WIDTH-1);
  localparam DEPTH = (2**ADDRESS_WIDTH-1);

  reg [WORD:0] data_out_r;
  reg [WORD:0] memory [0:DEPTH];

  always @(posedge clk) begin
    if (write_enable)
      memory[address_in_w] <= data_in;
    data_out_r <= memory[address_in_r];
  end

  assign data_out = data_out_r;

endmodule // sync_ram_sdp