From 43f417db555a948771f8fe5f32c6051ba3cff1d5 Mon Sep 17 00:00:00 2001
From: Paul Gardner-Stephen <paul@m-e-g-a.org>
Date: Fri, 5 Apr 2024 01:08:18 +1030
Subject: [PATCH] add extra debug register to confirm mapping #798

---
 src/vhdl/keypad_i2c.vhdl | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/vhdl/keypad_i2c.vhdl b/src/vhdl/keypad_i2c.vhdl
index 6bbd7fe72..55dfc0542 100644
--- a/src/vhdl/keypad_i2c.vhdl
+++ b/src/vhdl/keypad_i2c.vhdl
@@ -159,6 +159,8 @@ begin
         -- Show error status from I2C
         fastio_rdata(7 downto 6) <= "10";
         fastio_rdata(5 downto 0) <= debug_status;
+      elsif fastio_addr(7 downto 0) = "11111100" then
+        fastio_rdata <= x"42";
       else
         -- Else for debug show busy count
         fastio_rdata <= to_unsigned(busy_count,8);