clock-try-debounce.ino

#include <Time.h>
#include <TimeLib.h>

#define DISPLAY_BRIGHTNESS 	500

#define DIGIT_ON	HIGH
#define DIGIT_OFF	LOW

#define SEGMENT_ON  LOW
#define SEGMENT_OFF HIGH

/*
 * display_1 = hour 10s place
 * display_2 = hour 1s place
 * display_3 = minute 10s place
 * display_4 = minute 1s place
 * 
 * switch_1 = push button for hour up
 * switch_2 = push button for hour down
 * switch_3 = push button for minute up
 * switch_4 = push button for minute down
 */

// Power for the displays
int display_1 = 10;
int display_2 = 11;
int display_3 = 12;
int display_4 = 13;

// Defining pins for the segments
int segment_a = 2;
int segment_b = 3;
int segment_c = 4;
int segment_d = 5;
int segment_e = 6;
int segment_f = 7;
int segment_g = 8;
int segment_dot = 9;

// Input pins for the push buttons
byte switch_1 = A0;
byte switch_2 = A1;
byte switch_3 = A2;
byte switch_4 = A3;

void setup()
{
	pinMode(segment_a, OUTPUT);
	pinMode(segment_b, OUTPUT);
	pinMode(segment_c, OUTPUT);
	pinMode(segment_d, OUTPUT);
	pinMode(segment_e, OUTPUT);
	pinMode(segment_f, OUTPUT);
	pinMode(segment_g, OUTPUT);
	pinMode(segment_dot, OUTPUT);

	pinMode(display_1, OUTPUT);
	pinMode(display_2, OUTPUT);
	pinMode(display_3, OUTPUT);
	pinMode(display_4, OUTPUT);

	Serial.begin(9600);

	pinMode(switch_1, INPUT);
	pinMode(switch_2, INPUT);
	pinMode(switch_3, INPUT);
	pinMode(switch_4, INPUT);

	digitalWrite(switch_1, LOW);
	digitalWrite(switch_2, LOW);
	digitalWrite(switch_3, LOW);
	digitalWrite(switch_4, LOW);
}

void loop()
{
	digitalWrite(segment_dot, HIGH);

	int hr = hour();
  	int mn = minute();

  	if (hr > 12)
  		hr %= 12;

  	if (mn > 60)
  		mn %= 60;

 	int time = hr*100 + mn;

	Serial.println(time);

	for (int i = 250; i > 0; i--)
	{
		if (time >= 1000)
		{
			displayNumber1(time);
		}
		else
		{
			displayNumber2(time);
		}
	}

	for (int i = 250; i > 0; i--)
	{
		if (time >= 1000)
		{
			displayNumber3(time);
		}
		else
		{
			displayNumber4(time);
		}
	}

	if (digitalRead(switch_1) == HIGH || digitalRead(switch_2) == HIGH)
		set_time_hour();

	if (digitalRead(switch_3) == HIGH || digitalRead(switch_4) == HIGH)
		set_time_minute();
}

void set_time_hour()
{
  	int hours = hour();
  	int minutes = minute();

  	while (digitalRead(switch_1) == HIGH)
  	{
  		hours--;

  		if (hours < 1)
  		{
  			hours = 12;
  		}

  		for (int i = 20; i > 0; i--)
	  	{
	  		int time = hours*100 + minutes;

	  		if (time >= 1000)
	  			displayNumber1(time);
	  		else
	  			displayNumber2(time);
	  	}

	  	delay(200);
  	}

  	while (digitalRead(switch_2))
  	{
  		hours++;

  		if (hours > 12)
  		{
  			hours = 1;
  		}

  		for (int i = 20; i > 0; i--)
	  	{
	  		int time = hours*100 + minutes;

	  		if (time >= 1000)
	  			displayNumber1(time);
	  		else
	  			displayNumber2(time);
	  	}

	  	delay(200);
  	}

  	setTime(hours,minutes,0,0,0,0);
}

void set_time_minute()
{
	int hours = hour();
  	int minutes = minute();

  	while (digitalRead(switch_3))
  	{
  		minutes--;

  		if (minutes < 0)
  		{
  			minutes = 59;
  		}

  		for (int i = 20; i > 0; i--)
	  	{
	  		int time = hours*100 + minutes;

	  		if (time > 1000)
	  			displayNumber1(time);
	  		else
	  			displayNumber2(time);
	  	}

	  	delay(200);
  	}

  	while (digitalRead(switch_4))
  	{
  		minutes++;

  		if (minutes > 59)
  		{
  			minutes = 0;
  		}

  		for (int i = 20; i > 0; i--)
	  	{
	  		int time = hours*100 + minutes;

	  		if (time > 1000)
	  			displayNumber1(time);
	  		else
	  			displayNumber2(time);
	  	}

	  	delay(200);
  	}

  	setTime(hours,minutes,0,0,0,0);
}

void displayNumber1(int number)
{
	// Flash displays for a short amount of time
	for (int digit = 4; digit > 0; digit--)
	{
		switch (digit)
		{
			case 1:
				digitalWrite(display_1, DIGIT_ON);
				digitalWrite(segment_dot, LOW);
				break;

			case 2:
				digitalWrite(display_2, DIGIT_ON);
				digitalWrite(segment_dot, LOW);
				break;

			case 3:
				digitalWrite(display_3, DIGIT_ON);
				digitalWrite(segment_dot, LOW);
				break;

			case 4:
				digitalWrite(display_4, DIGIT_ON);
				digitalWrite(segment_dot, LOW);
				break;

		}

		lightNumber(number % 10);
		number /= 10;
		delayMicroseconds(DISPLAY_BRIGHTNESS);

		// Turn off all segments
		lightNumber(10);

		// Turn of all displays
		digitalWrite(display_1, DIGIT_OFF);
		digitalWrite(display_2, DIGIT_OFF);
		digitalWrite(display_3, DIGIT_OFF);
		digitalWrite(display_4, DIGIT_OFF);
	}
}

void displayNumber2(int number)
{
	// Flash displays for a short amount of time
	for (int digit = 4; digit > 0; digit--)
	{
		switch (digit)
		{
			case 1:
				lightNumber(10);
				digitalWrite(segment_dot, LOW);
				break;

			case 2:
				digitalWrite(display_2, DIGIT_ON);
				digitalWrite(segment_dot, LOW);
				break;

			case 3:
				digitalWrite(display_3, DIGIT_ON);
				digitalWrite(segment_dot, LOW);
				break;

			case 4:
				digitalWrite(display_4, DIGIT_ON);
				digitalWrite(segment_dot, LOW);
				break;

		}

		lightNumber(number % 10);
		number /= 10;
		delayMicroseconds(DISPLAY_BRIGHTNESS);

		// Turn off all segments
		lightNumber(10);

		// Turn of all displays
		digitalWrite(display_1, DIGIT_OFF);
		digitalWrite(display_2, DIGIT_OFF);
		digitalWrite(display_3, DIGIT_OFF);
		digitalWrite(display_4, DIGIT_OFF);
	}
}

void displayNumber3(int number)
{
	// Flash displays for a short amount of time
	for (int digit = 4; digit > 0; digit--)
	{
		switch (digit)
		{
			case 1:
				digitalWrite(display_1, DIGIT_ON);
				digitalWrite(segment_dot, HIGH);
				break;

			case 2:
				digitalWrite(display_2, DIGIT_ON);
				digitalWrite(segment_dot, HIGH);
				break;

			case 3:
				digitalWrite(display_3, DIGIT_ON);
				digitalWrite(segment_dot, HIGH);
				break;

			case 4:
				digitalWrite(display_4, DIGIT_ON);
				digitalWrite(segment_dot, HIGH);
				break;

		}

		lightNumber(number % 10);
		number /= 10;
		delayMicroseconds(DISPLAY_BRIGHTNESS);

		// Turn off all segments
		lightNumber(10);

		// Turn of all displays
		digitalWrite(display_1, DIGIT_OFF);
		digitalWrite(display_2, DIGIT_OFF);
		digitalWrite(display_3, DIGIT_OFF);
		digitalWrite(display_4, DIGIT_OFF);
	}
}

void displayNumber4(int number)
{
	// Flash displays for a short amount of time
	for (int digit = 4; digit > 0; digit--)
	{
		switch (digit)
		{
			case 1:
				lightNumber(10);
				digitalWrite(segment_dot, HIGH);
				break;

			case 2:
				digitalWrite(display_2, DIGIT_ON);
				digitalWrite(segment_dot, HIGH);
				break;

			case 3:
				digitalWrite(display_3, DIGIT_ON);
				digitalWrite(segment_dot, HIGH);
				break;

			case 4:
				digitalWrite(display_4, DIGIT_ON);
				digitalWrite(segment_dot, HIGH);
				break;

		}

		lightNumber(number % 10);
		number /= 10;
		delayMicroseconds(DISPLAY_BRIGHTNESS);

		// Turn off all segments
		lightNumber(10);

		// Turn of all displays
		digitalWrite(display_1, DIGIT_OFF);
		digitalWrite(display_2, DIGIT_OFF);
		digitalWrite(display_3, DIGIT_OFF);
		digitalWrite(display_4, DIGIT_OFF);
	}
}

void lightNumber(int number)
{
	switch (number)
	{
		case 0:
		    digitalWrite(segment_a, SEGMENT_ON);
		    digitalWrite(segment_b, SEGMENT_ON);
		    digitalWrite(segment_c, SEGMENT_ON);
		    digitalWrite(segment_d, SEGMENT_ON);
		    digitalWrite(segment_e, SEGMENT_ON);
		    digitalWrite(segment_f, SEGMENT_ON);
		    digitalWrite(segment_g, SEGMENT_OFF);
		    break;

	    case 1:
		    digitalWrite(segment_a, SEGMENT_OFF);
		    digitalWrite(segment_b, SEGMENT_ON);
		    digitalWrite(segment_c, SEGMENT_ON);
		    digitalWrite(segment_d, SEGMENT_OFF);
		    digitalWrite(segment_e, SEGMENT_OFF);
		    digitalWrite(segment_f, SEGMENT_OFF);
		    digitalWrite(segment_g, SEGMENT_OFF);
		    break;

	    case 2:
		    digitalWrite(segment_a, SEGMENT_ON);
		    digitalWrite(segment_b, SEGMENT_ON);
		    digitalWrite(segment_c, SEGMENT_OFF);
		    digitalWrite(segment_d, SEGMENT_ON);
		    digitalWrite(segment_e, SEGMENT_ON);
		    digitalWrite(segment_f, SEGMENT_OFF);
		    digitalWrite(segment_g, SEGMENT_ON);
		    break;

	    case 3:
		    digitalWrite(segment_a, SEGMENT_ON);
		    digitalWrite(segment_b, SEGMENT_ON);
		    digitalWrite(segment_c, SEGMENT_ON);
		    digitalWrite(segment_d, SEGMENT_ON);
		    digitalWrite(segment_e, SEGMENT_OFF);
		    digitalWrite(segment_f, SEGMENT_OFF);
		    digitalWrite(segment_g, SEGMENT_ON);
		    break;

	    case 4:
		    digitalWrite(segment_a, SEGMENT_OFF);
		    digitalWrite(segment_b, SEGMENT_ON);
		    digitalWrite(segment_c, SEGMENT_ON);
		    digitalWrite(segment_d, SEGMENT_OFF);
		    digitalWrite(segment_e, SEGMENT_OFF);
		    digitalWrite(segment_f, SEGMENT_ON);
		    digitalWrite(segment_g, SEGMENT_ON);
		    break;

	    case 5:
		    digitalWrite(segment_a, SEGMENT_ON);
		    digitalWrite(segment_b, SEGMENT_OFF);
		    digitalWrite(segment_c, SEGMENT_ON);
		    digitalWrite(segment_d, SEGMENT_ON);
		    digitalWrite(segment_e, SEGMENT_OFF);
		    digitalWrite(segment_f, SEGMENT_ON);
		    digitalWrite(segment_g, SEGMENT_ON);
		    break;

	    case 6:
		    digitalWrite(segment_a, SEGMENT_ON);
		    digitalWrite(segment_b, SEGMENT_OFF);
		    digitalWrite(segment_c, SEGMENT_ON);
		    digitalWrite(segment_d, SEGMENT_ON);
		    digitalWrite(segment_e, SEGMENT_ON);
		    digitalWrite(segment_f, SEGMENT_ON);
		    digitalWrite(segment_g, SEGMENT_ON);
		    break;

	    case 7:
		    digitalWrite(segment_a, SEGMENT_ON);
		    digitalWrite(segment_b, SEGMENT_ON);
		    digitalWrite(segment_c, SEGMENT_ON);
		    digitalWrite(segment_d, SEGMENT_OFF);
		    digitalWrite(segment_e, SEGMENT_OFF);
		    digitalWrite(segment_f, SEGMENT_OFF);
		    digitalWrite(segment_g, SEGMENT_OFF);
		    break;

	    case 8:
		    digitalWrite(segment_a, SEGMENT_ON);
		    digitalWrite(segment_b, SEGMENT_ON);
		    digitalWrite(segment_c, SEGMENT_ON);
		    digitalWrite(segment_d, SEGMENT_ON);
		    digitalWrite(segment_e, SEGMENT_ON);
		    digitalWrite(segment_f, SEGMENT_ON);
		    digitalWrite(segment_g, SEGMENT_ON);
		    break;

	    case 9:
		    digitalWrite(segment_a, SEGMENT_ON);
		    digitalWrite(segment_b, SEGMENT_ON);
		    digitalWrite(segment_c, SEGMENT_ON);
		    digitalWrite(segment_d, SEGMENT_ON);
		    digitalWrite(segment_e, SEGMENT_OFF);
		    digitalWrite(segment_f, SEGMENT_ON);
		    digitalWrite(segment_g, SEGMENT_ON);
		    break;

	  	// all segment are ON
	    case 10:
		    digitalWrite(segment_a, SEGMENT_OFF);
		    digitalWrite(segment_b, SEGMENT_OFF);
		    digitalWrite(segment_c, SEGMENT_OFF);
		    digitalWrite(segment_d, SEGMENT_OFF);
		    digitalWrite(segment_e, SEGMENT_OFF);
		    digitalWrite(segment_f, SEGMENT_OFF);
		    digitalWrite(segment_g, SEGMENT_OFF);
		    break;
	}
}