feat(top): new (de)scrambler, crc16

hdl/extract_mac_frame.v

@@ -0,0 +1,82 @@
+module extract_mac_frame (
+    input              clk,
+    input              rst,
+    // ldpc out
+    input              ldpc_dec_out_start,
+    input              ldpc_dec_out_valid,
+    input              ldpc_dec_out_data,
+    // axis
+    output wire        m_axis_mac_frame_tvalid,
+    output wire [31:0] m_axis_mac_frame_tdata,
+    input              m_axis_mac_frame_tready,
+    output reg         m_axis_mac_frame_tlast
+
+);
+    // NOTE: module 1bit --> 32bit
+    // transfer 1bit serial to 32bit and sent to axis fifo
+    // 
+
+    localparam MAC_FRAME_LEN_BIT = 107520;
+    localparam MAC_FRAME_LEN_BYTE = 13440;
+    localparam MAC_FRAME_LEN_QUAD_BYTE = 3360;
+
+
+    // ******** Wire & Reg  ********
+
+    reg  [15:0] cnt_axis_out;
+    wire        flag_handshake;
+    // serial input 
+    wire        ser;
+    wire        ser_valid;
+    wire [31:0] par;
+    wire        par_valid;
+
+
+    // ******** Assingment  ********
+
+    assign ser                     = ldpc_dec_out_data;
+    assign ser_valid               = ldpc_dec_out_valid;
+    assign m_axis_mac_frame_tvalid = par_valid;
+    assign m_axis_mac_frame_tdata  = par;
+
+    assign flag_handshake          = m_axis_mac_frame_tvalid & m_axis_mac_frame_tready;
+
+    // ******** Logic Block ********
+
+    always @(posedge clk) begin
+        if (rst) begin
+            cnt_axis_out <= 0;
+        end
+        else if (flag_handshake) begin
+            cnt_axis_out <= cnt_axis_out + 1;
+        end
+    end
+
+    always @(*) begin
+        if (cnt_axis_out == MAC_FRAME_LEN_QUAD_BYTE - 1 && flag_handshake) begin
+            m_axis_mac_frame_tlast = 1;
+        end
+        else begin
+            m_axis_mac_frame_tlast = 0;
+        end
+    end
+
+    // ********    Inst     ********
+
+    // serial 1bit --> 32bit
+    ser2par u_ser2par (
+        .clk      (clk),
+        .rst      (rst),
+        .ser      (ser),
+        .ser_valid(ser_valid),
+        .par      (par),
+        .par_valid(par_valid)
+    );
+
+
+
+    // ********    Debug    ********
+
+
+
+endmodule