added fifo.v

Author: Alex Yazdani

fifo.v

@@ -0,0 +1,50 @@
+/*
+Alexander Yazdani
+2 December 2024
+Synchronous and Asynchronous FIFO Implementations
+*/
+
+module fifo_synch #(
+    parameter DATA_WIDTH = 8,
+    parameter DEPTH = 16
+)(
+    input clk,
+    input reset,
+    input write_en,
+    input read_en,
+    input [DATA_WIDTH-1:0] d_in,
+    output reg [DATA_WIDTH-1:0] d_out,
+    output full,
+    output empty
+);
+
+reg [DATA_WIDTH-1:0] memory [0:DEPTH-1];
+reg [$clog2(DEPTH)-1:0] write_ptr;
+reg [$clog2(DEPTH)-1:0] read_ptr;
+reg [$clog2(DEPTH):0] count;
+
+
+always @(posedge clk) begin
+    if (reset) begin
+        write_ptr <= 0;
+        read_ptr <= 0;
+        d_out <= 0;
+        count <= 0;
+    end else begin
+        if (write_en && !full) begin
+            memory[write_ptr] <= d_in;
+            write_ptr <= (write_ptr + 1) % DEPTH;
+            count <= count + 1;
+        end 
+        if (read_en && !empty) begin
+            d_out <= memory[read_ptr];
+            read_ptr <= (read_ptr + 1) % DEPTH;
+            count <= count - 1;
+        end
+    end
+end
+
+assign full = (count == DEPTH);
+assign empty = (count == 0);
+
+endmodule