From 55adbcf90a4c53563c368250a12577a78f4fb012 Mon Sep 17 00:00:00 2001
From: Nicholas Orlowsky <nickorlow@nickorlow.com>
Date: Sat, 13 Apr 2024 22:18:43 -0500
Subject: [PATCH] keypad demo

---
 keypad.sv | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 keypad.sv

diff --git a/keypad.sv b/keypad.sv
new file mode 100644
index 0000000..97a125a
--- /dev/null
+++ b/keypad.sv
@@ -0,0 +1,29 @@
+module keypad(
+    input clk_in,
+    input wire [3:0] row,
+    output logic [3:0] col,
+    output [5:0] cur_press
+);
+
+    logic [1:0] col_idx;
+    logic [15:0] keymap;
+
+    assign cur_press = {clk_in, 1'b0, keymap[3:0]};
+
+    initial begin 
+        col_idx = 0;
+        col = 0;
+        keymap = 0;
+    end
+
+    always_ff @(posedge clk_in) begin
+        for(logic [2:0] i = 0; i < 4; i++) begin
+            keymap[(i*4)+col_idx] <= row[i[1:0]];
+        end 
+
+        col[col_idx] <= 1;
+        col[col_idx+1] <= 0;
+        col_idx <= col_idx + 1;
+    end
+
+endmodule