Time adjust algo changed

+ Added 600ms pause before spin numbers if button pressed
* Changed increment delay 500ms -> 200ms
* Button bounce compensation code

simpleclock.ino

@@ -41,14 +41,24 @@
 DS1307 clock;
 SevSeg Display;
 
+/* push button stuff */
+const long initial_delay = 600;   // wait a bit before spin numbers
+const long adjust_interval = 200; // delay between consecutive number increnents
+const long bounce_delay = 20;     // contact bounce compensation
+const int hrs_btn = A0;           // put hour adjusting button on A0 lane
+const int min_btn = A1;           // put minute adjusting button on A1 lane
+bool btn_pushed = false;          // is button pushed?
+unsigned long currentPushTimer;
+unsigned long previousPushTimer = 0;
+uint8_t minutes;
+uint8_t hours;
+
+/* dot blinking stuff */
 unsigned long currentMillis;
 unsigned long previousMillis = 0;
 const long interval = 500;
-const int hrs_btn = A0;
-const int min_btn = A1;
 bool dot = true;
-uint8_t minutes;
-uint8_t hours;
+
 /* time inaccuracy compensation flag */
 uint8_t compflag = 0;
 
@@ -67,8 +77,8 @@ void setup()
 	bool leadingZeros = false;
 
 	Display.begin(hardwareConfig, numDigits, digitPins, segmentPins,
-	              resistorsOnSegments, updateWithDelays, leadingZeros);
-	Display.setBrightness(90);
+                      resistorsOnSegments, updateWithDelays, leadingZeros);
+	Display.setBrightness(100);
 
 	// setup clock
 	clock.begin();
@@ -90,18 +100,35 @@ void setup()
 
 void loop()
 {
-	unsigned long currentMillis = millis();
+	currentMillis = millis();
+	currentPushTimer = currentMillis;
 	char str[4];
 	float d;
 
-	if (currentMillis - previousMillis >= interval) {
-		previousMillis = currentMillis;
+	clock.getTime();
 
-		if (dot == false) {
-			dot = true;
+	// push button magic
+	if ((!btn_pushed) and
+            ((digitalRead(hrs_btn) == LOW) or (digitalRead(min_btn) == LOW))) {
+		if (currentPushTimer - previousPushTimer >= initial_delay) {
+			previousPushTimer = currentPushTimer;
+			btn_pushed = true;
+		}
+	}
+
+	if (btn_pushed and
+            (digitalRead(hrs_btn) != LOW) and (digitalRead(min_btn) != LOW)) {
+		// compensate possible contact bounce with delay
+		if (currentPushTimer - previousPushTimer >= bounce_delay) {
+			btn_pushed = false;
+		}
+	}
+
+	if (btn_pushed) {
+		if (currentPushTimer - previousPushTimer >= adjust_interval) {
+			previousPushTimer = currentPushTimer;
 
 			if (digitalRead(hrs_btn) == LOW) {
-				clock.getTime();
 				hours = clock.hour + 1;
 				(hours > 23) ? hours = 0 : hours;
 				clock.fillByHMS(hours, clock.minute, 0);
@@ -109,18 +136,23 @@ void loop()
 			}
 
 			if (digitalRead(min_btn) == LOW) {
-				clock.getTime();
 				minutes = clock.minute + 1;
 				(minutes > 59) ? minutes = 0 : minutes;
 				clock.fillByHMS(clock.hour, minutes, 0);
 				clock.setTime();
 			}
-		} else {
-			dot = false;
 		}
 	}
 
-	clock.getTime();
+	if (currentMillis - previousMillis >= interval) {
+		previousMillis = currentMillis;
+
+		if (dot)
+			dot = false;
+		else
+			dot = true;
+	}
+
 	/*
 	 * Let's implement time compenstion for individual rtc module time
 	 * charachteristics. In in my case quartz resonator as inaccurate as
@@ -129,20 +161,20 @@ void loop()
 	 */
 
 	if ((clock.hour == 21) and (clock.minute == 21) and
-	    (clock.second == 21) and (compflag == 0)) {
+            (clock.second == 21) and (compflag == 0)) {
 		clock.fillByHMS(clock.hour, clock.minute, 14);
 		clock.setTime();
 		compflag = 1;
 	}
 
 	if ((clock.hour == 21) and (clock.minute == 21) and
-	    (clock.second == 23) and (compflag == 1)) {
+            (clock.second == 23) and (compflag == 1)) {
 		compflag = 0;
 	}
 
 	// make blinking dot
 	if (clock.hour > 0) {
-		if (dot == true) {
+		if (dot) {
 			Display.setNumber((clock.hour * 100 + clock.minute), 2);
 		} else {
 			Display.setNumber((clock.hour * 100 + clock.minute));
@@ -150,7 +182,7 @@ void loop()
 	} else {
 		/* 0 o'clock is an exception, we don't want to see "00.00", we
 		   want see "0.00" or "0 00", so we have to use this "hack" */
-		if (dot == true) {
+		if (dot) {
 			d = float(clock.minute) / 100;
 			Display.setNumber(d, 2);
 		} else {