Add BME280 temperature display on timer ISR

metronom.ino

@@ -1,3 +1,15 @@
+#include "SAMDTimerInterrupt.h"
+#include "SAMD_ISR_Timer.h"
+
+#define HW_TIMER_INTERVAL_MS 10
+SAMDTimer ITimer(TIMER_TC3);
+SAMD_ISR_Timer ISR_Timer;
+
+void TimerHandler(void) {
+  ISR_Timer.run();
+}
+
+
 const uint BUZZER_PIN = 0;
 
 const uint BUTTON_LED_PIN = 5;
@@ -14,6 +26,10 @@ void setup() {
   // Order of ISRs matter: RISING should be invoked first
   attachInterrupt(digitalPinToInterrupt(BUTTON_PIN), buttonISRtime, CHANGE);
   attachInterrupt(digitalPinToInterrupt(BUTTON_PIN), buttonISRstate, RISING);
+
+  initTemperature();
+  ITimer.attachInterruptInterval_MS(10, TimerHandler);
+  ISR_Timer.setInterval(1000, readTemperature);
 }
 
 void loop() {