From 229d52dc2bab6bf723e6ceb08a4ba86b96f019e4 Mon Sep 17 00:00:00 2001
From: Johnathon Slightham <slighthamj@gmail.com>
Date: Wed, 26 Jun 2024 11:36:49 -0400
Subject: [PATCH] Add project 1

---
 Project1/hamming.v   | 31 ++++++++++++++++++++++++++++
 Project1/hammingtb.v | 48 ++++++++++++++++++++++++++++++++++++++++++++
 README.md            |  5 ++++-
 3 files changed, 83 insertions(+), 1 deletion(-)
 create mode 100644 Project1/hamming.v
 create mode 100644 Project1/hammingtb.v

diff --git a/Project1/hamming.v b/Project1/hamming.v
new file mode 100644
index 0000000..d7f924f
--- /dev/null
+++ b/Project1/hamming.v
@@ -0,0 +1,31 @@
+`timescale 1ns / 1ps
+
+module hamming(
+    input [11:0] code,
+    output [7:0] data,
+    output [3:0] syndrome
+);
+    reg [3:0] rec_check, calc_check;
+    reg [11:0] corrected_code;
+
+    always @* begin
+        rec_check = { code[7], code[3], code[1], code[0] };
+
+        calc_check[0] = code[2] ^ code[4] ^ code[6] ^ code[8] ^ code[10];
+        calc_check[1] = code[2] ^ code[5] ^ code[6] ^ code[9] ^ code[10];
+        calc_check[2] = code[4] ^ code[5] ^ code[6] ^ code[11];
+        calc_check[3] = code[8] ^ code[9] ^ code[10] ^ code[11];
+    end
+
+    always@* begin
+        corrected_code = code;
+        if (syndrome > 0)
+            corrected_code[syndrome - 1] = ~corrected_code[syndrome - 1];
+
+    end
+
+    assign syndrome = calc_check ^ rec_check;
+    assign data = { corrected_code[11], corrected_code[10], corrected_code[9], corrected_code[8],
+        corrected_code[6], corrected_code[5], corrected_code[4], corrected_code[2] };
+
+endmodule
diff --git a/Project1/hammingtb.v b/Project1/hammingtb.v
new file mode 100644
index 0000000..7d71552
--- /dev/null
+++ b/Project1/hammingtb.v
@@ -0,0 +1,48 @@
+`timescale 1ns / 1ps
+
+module hammingtb(
+    );
+
+    reg [11:0] code;
+    wire [7:0] data;
+    wire [3:0] syndrome;
+
+    hamming h1 (.code(code), .data(data), .syndrome(syndrome));
+
+    initial
+    begin
+        $monitor ($time, " ns code=%b, data=%b, syndrome=%b", code, data, syndrome);
+            code = 12'b0011_0100_1111;
+        #10 code = 12'b1011_0100_1111;
+        #10 code = 12'b0111_0100_1111;
+        #10 code = 12'b0001_0100_1111;
+        #10 code = 12'b0010_0100_1111;
+        #10 code = 12'b0011_1100_1111;
+        #10 code = 12'b0011_0000_1111;
+        #10 code = 12'b0011_0110_1111;
+        #10 code = 12'b0011_0101_1111;
+        #10 code = 12'b0011_0100_0111;
+        #10 code = 12'b0011_0100_1011;
+        #10 code = 12'b0011_0100_1101;
+        #10 code = 12'b0011_0100_1110;
+
+        #10 code = 12'b1111_0111_0111;
+        #10 code = 12'b1111_0111_0110;
+        #10 code = 12'b1111_0111_0101;
+        #10 code = 12'b1111_0111_0011;
+        #10 code = 12'b1111_0111_1111;
+        #10 code = 12'b1111_0110_0111;
+        #10 code = 12'b1111_0101_0111;
+        #10 code = 12'b1111_0011_0111;
+        #10 code = 12'b1111_1111_0111;
+        #10 code = 12'b1110_0111_0111;
+        #10 code = 12'b1101_0111_0111;
+        #10 code = 12'b1011_0111_0111;
+        #10 code = 12'b0111_0111_0111;
+
+        #10 code = 12'b0000_0000_0000;
+        #10 $finish;
+    end
+
+
+endmodule
diff --git a/README.md b/README.md
index 1beca86..f4f02e9 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,4 @@
-# ece-327
\ No newline at end of file
+# ece-327
+My solutions to projects in my Digital Hardware Systems course.
+
+1. Project 1: Hamming Decoder
\ No newline at end of file