From 92420e248d4449a2aa61e92f05c0867912d48d56 Mon Sep 17 00:00:00 2001
From: Julian Blake Kongslie
Date: Wed, 16 Feb 2022 14:44:01 -0800
Subject: Split into multiple files.

---
 hdl/result_printer.sv | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 hdl/result_printer.sv

(limited to 'hdl/result_printer.sv')

diff --git a/hdl/result_printer.sv b/hdl/result_printer.sv
new file mode 100644
index 0000000..7bcaf31
--- /dev/null
+++ b/hdl/result_printer.sv
@@ -0,0 +1,55 @@
+module result_printer
+    (   input   bit         clock
+    ,   input   bit         resetn
+
+    ,   output  bit         result_ready
+    ,   input   bit         result_valid
+    ,   input   bit [15:0]  result_data
+
+    ,   input   bit         echo_ready
+    ,   output  bit         echo_valid
+    ,   output  bit [7:0]   echo_data
+    );
+
+    bit         hold_valid;
+    bit [15:0]  hold;
+
+    enum
+        {   DIGIT_1
+        ,   DIGIT_2
+        ,   DIGIT_3
+        ,   DIGIT_4
+        } state;
+
+    always @(posedge clock) begin
+        if (!resetn) begin
+            result_ready = 0;
+            echo_valid = 0;
+            echo_data = 0;
+            hold_valid = 0;
+            hold = 0;
+            state = state.first;
+        end else begin
+            if (echo_ready) echo_valid = 0;
+            if (result_ready && result_valid) begin
+                hold_valid = 1;
+                hold = result_data;
+            end
+
+            if (hold_valid && !echo_valid) begin
+                echo_valid = 1;
+                echo_data = hold[15:12];
+                hold = hold << 4;
+                if (echo_data < 10)
+                    echo_data = echo_data + "0";
+                else
+                    echo_data = echo_data + "A" - 10;
+                state = state.next;
+                if (state == state.first) hold_valid = 0;
+            end
+
+            result_ready = !hold_valid;
+        end
+    end
+
+endmodule
-- 
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