From f63a9ac77d542ec7f630526934ce05d0e527de7a Mon Sep 17 00:00:00 2001
From: David Hebbeker <david@hebbeker.info>
Date: Thu, 27 Apr 2023 19:14:17 +0200
Subject: [PATCH 1/2] Print detected event.

---
 src/main.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/main.cpp b/src/main.cpp
index 0f60f1d75..a438c24e7 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -64,6 +64,7 @@ void loop()
     const auto event = getEvent();
     if (event)
     {
+        Serial.printf("Process event '%u'.\n", event);
         constexpr std::uint16_t notes[] = {note::c3, note::d3, note::e3, note::f3, note::g3, note::a3, note::b3, note::c4};
         const std::uint8_t newRegisterValue = 1 << (8 - event);
         outputShiftRegister.setAll(&newRegisterValue);

From 1b07d38fe0add7e16fe484888b5c64685fb9dde5 Mon Sep 17 00:00:00 2001
From: David Hebbeker <david@hebbeker.info>
Date: Thu, 27 Apr 2023 20:12:51 +0200
Subject: [PATCH 2/2] Miscellaneous cleanup.

---
 src/main.cpp | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index a438c24e7..f5706d7b4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,11 +2,9 @@
 #include "board_pins.hpp"
 #include "display.h"
 #include "pitches.hpp"
-//#include <ESP32Tone.h>
 #include <Arduino.h>
 #include <RoxMux.h>
 #include <ShiftRegister74HC595.h>
-#include <cmath>
 #include <cstdint>
 
 /**
@@ -14,11 +12,13 @@
  */
 ShiftRegister74HC595<1U> outputShiftRegister(board::osr::pin::data, board::osr::pin::clock, board::osr::pin::latch);
 
+/**
+ * Input shift register.
+ */
 Rox74HC165<1U> inputShiftRegister;
 
 /**
- *
- * @return 1-8 or 0 in case of no event
+ * @returns 1-8 or 0 in case of no event
  */
 static std::uint8_t getEvent()
 {
@@ -49,7 +49,6 @@ namespace main
 {
 void setup(char const *programIdentificationString)
 {
-    // put your setup code here, to run once:
     pinMode(board::buzzer::pin::on_off, OUTPUT);
     inputShiftRegister.begin(board::isr::pin::data, board::isr::pin::latch, board::isr::pin::clock);
     setup_display();