Remove buzzer state variable

buzzer.ino

@@ -1,17 +1,13 @@
-#include <Arduino.h>
-
 SAMDTimer BuzzerTimer(TIMER_TC5);
+
 bool attached = false;
 
 void initBuzzer() {
   pinMode(BUZZER_PIN, OUTPUT);
 }
 
-volatile bool buzzing = false;
 void buzzerISR() {
-  digitalWrite(BUZZER_PIN, buzzing ? LOW : HIGH);
-  buzzing = !buzzing;
-  //digitalToggle(BUZZER_PIN);
+  digitalWrite(BUZZER_PIN, !digitalRead(BUZZER_PIN));
 }
 
 void buzz() {
@@ -24,23 +20,3 @@ void buzz() {
 void noBuzz() {
   BuzzerTimer.disableTimer();
 }
-
-/*
-// https://forum.arduino.cc/t/adding-a-toggle-function-to-wiring-digital-c/975608
-void digitalToggle(uint8_t pin) {
-  uint8_t timer = digitalPinToTimer(pin);
-  uint8_t bit = digitalPinToBitMask(pin);
-  uint8_t port = digitalPinToPort(pin);
-  volatile uint8_t *out;
-  
-  if (port == NOT_A_PIN) return;
-  if (timer != NOT_ON_TIMER) turnOffPWM(timer);
-  
-  out = portOutputRegister(port);
-  
-  uint8_t oldSREG = SREG;
-  cli();
-  *out ^= bit;
-  SREG = oldSREG;
-}
-*/

metronom.ino

@@ -32,7 +32,7 @@ void setup() {
   TaskTimer.attachInterruptInterval_MS(20, TasksHandler);
   TasksISRs.setInterval(PERIOD_MS, runMetronome);
   TasksISRs.setInterval(PERIOD_MS, readTemperature);
-  TasksISRs.setInterval(PERIOD_MS, updateTube);
+  TasksISRs.setInterval(200, updateTube);
 }
 
 void runMetronome() {