1 files changed, 84 insertions, 0 deletions
diff --git a/atk16_fpga/bram_fsm_tb.v b/atk16_fpga/bram_fsm_tb.v
new file mode 100644
index 0000000..1ec5a88
--- /dev/null
+++ b/atk16_fpga/bram_fsm_tb.v
@@ -0,0 +1,84 @@
+`default_nettype none
+`define DUMPSTR(x) `"x.vcd`"
+`timescale 10 ns / 100 ps
+
+module bram_fsm_tb();
+
+    reg clk, rst, read_en, write_en;
+    reg [15:0] addr, data_in;
+    wire done;
+    wire [15:0] data_out;
+
+    bram_fsm dut(
+        .clk(clk),
+        .addr(addr),
+        .data_in(data_in),
+        .read_en(read_en),
+        .write_en(write_en),
+        .data_out(data_out),
+        .done(done)
+    );
+
+    // Clock generation
+    always #5 clk = ~clk;  // 100 MHz clock
+
+    reg failed;
+    initial begin
+        failed = 0;
+        $dumpfile(`DUMPSTR(`VCD_OUTPUT));
+        $dumpvars(0, bram_fsm_tb);
+
+        clk = 0;
+        rst = 0;
+        read_en = 0;
+        write_en = 0;
+        #10
+
+        // test read
+        dut.bram_inst.mem[0] = 16'hffff;
+        addr = 16'd0;
+        read_en = 1;
+        write_en = 0;
+
+        while (!done) #10;
+
+        if (data_out == 16'hffff && done == 1) begin
+            $display("\033[0;32m[PASS]\033[0m Read: data is available and done is 1 as expected");
+        end else begin
+            $display("\033[0;31m[FAIL]\033[0m Read: done is %d (expected 1), data is %04h (expected ffff)", done, data_out);
+            failed = 1;
+        end
+
+        read_en = 0;
+        write_en = 0;
+        #10
+
+        // test write
+        addr = 16'd1;
+        data_in = 16'hffff;
+        read_en = 0;
+        write_en = 1;
+
+        while (!done) #10;
+
+        if (dut.bram_inst.mem[1] == 16'hffff && done == 1) begin
+            $display("\033[0;32m[PASS]\033[0m Write: data is available and done is 1 as expected");
+        end else begin
+            $display("\033[0;31m[FAIL]\033[0m Write: done is %d (expected 0), data is %04h (expected FFFF)", done, data_out);
+            failed = 1;
+        end
+
+        read_en = 0;
+        write_en = 0;
+
+        #5
+        if (failed) begin
+            $display("🛑 \033[0;31mTest suite failed\033[0m");
+            $fatal(1);
+        end else
+            $display("✅ \033[0;32mTest suite passed\033[0m");
+
+        $finish;
+    end
+
+endmodule