/**********************************************
*									Binary Watch
*								 by Mastro Gippo
*
*										(c) 2008
**********************************************/

#include "main.h"


#define RowH PIN_A1
#define RowM PIN_A2

#define PwmDel delay_us(0)

int1 OnLed;
int8 Seconds = 0;
int8 Hours = 0, Minutes = 0;

void PrintRows(int8 R1, int8 R2);
   
#int_RTCC
void  RTCC_isr(void) 
{
  Seconds++;  //   Increment number of seconds

  if(Seconds == 60) {Minutes++; Seconds = 0;
    if(Minutes == 60) {Hours++; Minutes = 0;
      if(Hours == 24) {Days++; Hours = 0;
  }}} 
}

void main()
{
	int8 Pse;
	int8 Cnt;
	
	//Setup...
	setup_timer_0(RTCC_INTERNAL|RTCC_DIV_32);
	setup_timer_1(T1_DISABLED);
	setup_comparator(NC_NC_NC_NC);
	setup_vref(FALSE);
	enable_interrupts(INT_RTCC);
	enable_interrupts(GLOBAL);
	
	port_a_pullups(FALSE);
	
	output_low(RowH);
	output_low(RowM);
	output_low(PIN_C0);
	output_low(PIN_C1);
	output_low(PIN_C2);
	output_low(PIN_C3);
	output_low(PIN_C4);
	output_low(PIN_C5);
	
	#use fast_io(A)
	set_tris_a(0xF9);
	#use fast_io(C)
	set_tris_c(0x00);
	
	Hours = 13;
	Minutes = 1;

  while(1)
  {
	  if(input(PIN_A0)) //Button pressed; Show time
	  {
			Pse = Seconds;
			Cnt = 5;	//Show time for 5 seconds
			while(Cnt > 0)
			{
				if(Seconds != Pse)
				{
					Pse = Seconds;
					Cnt--;
				}
				PrintRows(Minutes, Hours);
			}
			
			//If button is still pressed after 5 seconds, set up
			if(input(PIN_A0))
			{
				output_high(RowM);
				output_c(0x20);
				
				delay_ms(2000);
				
				output_c(0x00);
				output_low(RowM);
			
				Pse = Seconds;
				Cnt = 4;
				while(Cnt > 0)
				{
					if(input(PIN_A0)) //Increase minutes every button press
					{
					   Cnt = 4;
					   delay_ms(10); //Simple debounce
					   Minutes++;
					   if(Minutes == 60)
					      Minutes = 0;
					   
					   //Shows current setting, while waiting
					   //for the user to release the button
					   while(input(PIN_A0)){PrintRows(Minutes, 0);};
					}
					//If the user doesn't press the button for 4sec,
					//switch to Hour setting
					if(Seconds != Pse)  
					{
					  Pse = Seconds;
					  Cnt--;
					}
					PrintRows(Minutes, 0);
				}
			    
				Pse = Seconds;
				Cnt = 4;
				while(Cnt > 0)
		    {
					if(input(PIN_A0))
					{
						Cnt = 4;
						delay_ms(10);
						Hours++;
						if(Hours == 24)
							Hours = 0;
							
						while(input(PIN_A0)){PrintRows(0, Hours);};
					}
					if(Seconds != Pse)
					{
						Pse = Seconds;
						Cnt--;
					}
					PrintRows(0, Hours);
		    }
			    
				Pse = Seconds;
				Cnt = 5;
				while(Cnt > 0)
				{
					if(Seconds != Pse)
					{
						Pse = Seconds;
						Cnt--;
					}
					PrintRows(Minutes, Hours);
				}
			}
		}
  }
}

void PrintRows(int8 R1, int8 R2)
{
	static int8 i;
	
	output_low(RowH);
	output_high(RowM);

	//I have only one resistor, so I must
	//turn on only one led at a time	
	#use fast_io(C)
	output_c(R1 & 0x01);
	output_c(R1 & 0x02);
	output_c(R1 & 0x04);
	output_c(R1 & 0x08);
	output_c(R1 & 0x10);
	output_c(R1 & 0x20);
	
	output_low(RowM);
	output_high(RowH);
	
	output_c(R2 & 0x01);
	output_c(R2 & 0x02);
	output_c(R2 & 0x04);
	output_c(R2 & 0x08);
	output_c(R2 & 0x10);
	output_c(0);
	
	output_low(RowM);
	output_low(RowH);
}