1 files changed, 81 insertions, 0 deletions
diff --git a/tests/ecp5/dpram_tb.v b/tests/ecp5/dpram_tb.v
new file mode 100644
index 000000000..dede64614
--- /dev/null
+++ b/tests/ecp5/dpram_tb.v
@@ -0,0 +1,81 @@
+module testbench;
+    reg clk;
+
+    initial begin
+       //  $dumpfile("testbench.vcd");
+       //  $dumpvars(0, testbench);
+
+        #5 clk = 0;
+        repeat (10000) begin
+            #5 clk = 1;
+            #5 clk = 0;
+        end
+    end
+
+
+    reg [7:0] data_a = 0;
+	reg [7:0] addr_a = 0;
+	reg [7:0] addr_b = 0;
+    reg we_a = 0;
+    reg re_a = 1;
+	wire [7:0] q_a;
+	reg mem_init = 0;
+
+	reg [7:0] pq_a;
+
+    always @(posedge clk) begin
+    #3;
+    data_a <= data_a + 17;
+
+    addr_a <= addr_a + 1;
+    addr_b <= addr_b + 1;
+    end
+
+    always @(posedge addr_a) begin
+    #10;
+        if(addr_a > 6'h3E)
+            mem_init <= 1;
+    end
+
+	always @(posedge clk) begin
+    //#3;
+    we_a <= !we_a;
+    end
+
+    reg [7:0] mem [(1<<8)-1:0];
+
+    always @(posedge clk) // Write memory.
+	begin
+	if (we_a)
+	mem[addr_a] <= data_a; // Using write address bus.
+	end
+	always @(posedge clk) // Read memory.
+	begin
+	pq_a <= mem[addr_b]; // Using read address bus.
+	end
+
+	top uut (
+		.din(data_a),
+		.write_en(we_a),
+		.waddr(addr_a),
+		.wclk(clk),
+		.raddr(addr_b),
+		.rclk(clk),
+		.dout(q_a)
+		);
+
+	uut_mem_checker port_a_test(.clk(clk), .init(mem_init), .en(!we_a), .A(q_a), .B(pq_a));
+
+endmodule
+
+module uut_mem_checker(input clk, input init, input en, input [7:0] A, input [7:0] B);
+    always @(posedge clk)
+    begin
+        #1;
+        if (en == 1 & init == 1 & A !== B)
+        begin
+            $display("ERROR: ASSERTION FAILED in %m:",$time," ",A," ",B);
+            $stop;
+        end
+    end
+endmodule