add a "complicated" Makefile for testing

Also the corresponding top-level module (for Xula2)

1 files changed, 71 insertions, 0 deletions

diff --git a/hdl/complicated.v b/hdl/complicated.v
new file mode 100644
index 0000000..4d31588
--- /dev/null
+++ b/hdl/complicated.v
@@ -0,0 +1,71 @@
+/*
+ * complicated.v
+ *
+ * Copyright: (C) 2013 LeafLabs, LLC
+ * License: MIT License (See LICENSE file)
+ * Author: Bryan Newbold <bnewbold@leaflabs.com>
+ * Date: November 2013
+ *
+ * This is an intentionally complicated top-level file.
+ *
+ * TODO if using this as a template for another design:
+ *  - use a clock buffer, even if sticking with 12mhz
+ */
+
+module complicated (
+    input wire clock_12mhz,
+    inout wire [31:0] chan,
+    inout wire chan_clk,
+
+    //// Flash and microSD I/O
+    output wire microsd_cs,
+    output wire flash_cs,
+    output wire flash_sclk,
+    output wire flash_mosi,
+    output wire flash_miso
+    );
+
+    parameter GIT_COMMIT = 0;
+    parameter BUILD_UNIX_TIME = 0;
+
+    wire reset = chan[0];
+
+    reg [22:0] throb_counter = 0;
+    reg throb_led = 0;
+    assign chan[10] = throb_led;
+
+    bram bram_inst (
+        .clka(clock_12mhz),
+        .ena(1'b0),
+        .wea(1'b1),
+        .addra(10),
+        .dina(11),
+        .clkb(clock_12mhz),
+        .rstb(reset),
+        .enb(1'b0),
+        .addrb(13),
+        .doutb()
+        );
+
+    always @(posedge clock_12mhz) begin
+        if (reset) begin
+            throb_counter <= 0;
+            throb_led <= 0;
+        end else begin
+            if (throb_counter >= 23'd06_000_000) begin
+                throb_led <= !throb_led;
+                throb_counter <= 23'd0;
+            end else begin
+                throb_counter <= throb_counter + 23'd1;
+            end
+        end
+    end
+
+    // Tie off unused outputs
+    assign microsd_cs = 1'bZ;
+    assign flash_cs = 1'bZ;
+    assign flash_sclk = 1'bZ;
+    assign flash_mosi = 1'bZ;
+    assign flash_miso = 1'bZ;
+
+endmodule