RTC: remove Serial.print()s from callback functions (#178)

Author: jacobhylen

libraries/RTC/examples/RTC_AutomaticExample/RTC_AutomaticExample.ino

@@ -17,6 +17,8 @@
 // Include the RTC library
 #include "RTC.h"
 
+bool alarmFlag = false;
+
 DayOfWeek convertDayOfWeek(String s)
 {
   if (s == String("Mon"))
@@ -139,20 +141,7 @@ RTCTime currentRTCTime()
 }
 
 void alarmCallback() {
-  Serial.println("An alarm was triggered at:");
-  RTCTime currentTime;
-  RTC.getTime(currentTime); 
-  Serial.print(currentTime.getYear());
-  Serial.print("-");
-  Serial.print(Month2int(currentTime.getMonth()));
-  Serial.print("-");
-  Serial.print(currentTime.getDayOfMonth());
-  Serial.print(" ");
-  Serial.print(currentTime.getHour());
-  Serial.print(":");
-  Serial.print(currentTime.getMinutes());
-  Serial.print(":");
-  Serial.println(currentTime.getSeconds());
+ alarmFlag = true;
 }
 
 void setup()
@@ -195,4 +184,21 @@ void setup()
 
 void loop()
 {
+  if(alarmFlag){
+  Serial.println("An alarm was triggered at:");
+  RTCTime currentTime;
+  RTC.getTime(currentTime); 
+  Serial.print(currentTime.getYear());
+  Serial.print("-");
+  Serial.print(Month2int(currentTime.getMonth()));
+  Serial.print("-");
+  Serial.print(currentTime.getDayOfMonth());
+  Serial.print(" ");
+  Serial.print(currentTime.getHour());
+  Serial.print(":");
+  Serial.print(currentTime.getMinutes());
+  Serial.print(":");
+  Serial.println(currentTime.getSeconds());
+  alarmFlag = false;
+  }
 }

libraries/RTC/examples/Test_RTC/Test_RTC.ino

@@ -14,29 +14,19 @@
 // Define the interrupt pin for LED control during interrupts
 const int LED_ON_INTERRUPT  = 22;
 
+bool periodicFlag = false;
+bool alarmFlag = false;
+
 // Callback function for periodic interrupt
 void periodic_cbk() {
-  static bool clb_st = false;
-
-  // Toggle the LED based on callback state
-  if (clb_st) {
-    digitalWrite(LED_ON_INTERRUPT, HIGH);
-  }
-  else {
-    digitalWrite(LED_ON_INTERRUPT, LOW);
-  }
-
-  clb_st = !clb_st;  // Toggle callback state
-
-  // Print message indicating periodic interrupt
-  Serial.println("PERIODIC INTERRUPT");
+  periodicFlag = true;
 }
 
+// Callback function for alarm interrupt
 void alarm_cbk() {
-  Serial.println("ALARM INTERRUPT");
+  alarmFlag = true;
 }
 
-// Callback function for alarm interrupt
 void setup() {
   // Initialize serial communication
   Serial.begin(9600);
@@ -91,6 +81,33 @@ void loop() {
 
   RTCTime currenttime;
 
+  if(periodicFlag){
+    // Print message indicating periodic interrupt
+    Serial.println("PERIODIC INTERRUPT");
+
+    static bool clb_st = false;
+
+    // Toggle the LED based on callback state
+    if (clb_st) {
+      digitalWrite(LED_ON_INTERRUPT, HIGH);
+    }
+    else {
+      digitalWrite(LED_ON_INTERRUPT, LOW);
+    }
+
+    clb_st = !clb_st;  // Toggle callback state
+
+    periodicFlag = false;
+  }
+
+  if(alarmFlag){
+    // Print message indicating alarm interrupt
+    Serial.println("ALARM INTERRUPT");
+
+    alarmFlag = false;
+  }
+
+
   // Check if RTC is running and print status
   if (status) {