/*

Pins:
######

PB1		SCK Programmer
PB2		MOSI Programmer
PB3		MISO Programmer

PC0		LCD D0
PC1		LCD D1
PC2		LCD D2
PC3		LCD D3
PC4		LCD D4
PC5		LCD D5
PC6		LCD D6
PC7		LCD D7

PF0		NumpadLeftCol
PF1		NumpadMiddleCol
PF2		NumpadRightCol
PF3		NumpadTopRow
PF4		NumpadUpperMiddleRow
PF5		NumpadLowerMiddleRow
PF6		NumpadBottomRow
PF7

PG0		LCD E2
PG1		LCD E1
PG2		LCD RS

*/

//Ignoring all the #includes, they are not relevant for this


#define DEBOUNCETIME 10


// Global variables for button debouncing

bool Numpad0Old = false;
bool Numpad1Old = false;
bool Numpad2Old = false;
bool Numpad3Old = false;
bool Numpad4Old = false;
bool Numpad5Old = false;
bool Numpad6Old = false;
bool Numpad7Old = false;
bool Numpad8Old = false;
bool Numpad9Old = false;
bool NumpadMinusOld = false;
bool NumpadPointOld = false;

bool Numpad0New = false;
bool Numpad1New = false;
bool Numpad2New = false;
bool Numpad3New = false;
bool Numpad4New = false;
bool Numpad5New = false;
bool Numpad6New = false;
bool Numpad7New = false;
bool Numpad8New = false;
bool Numpad9New = false;
bool NumpadMinusNew = false;
bool NumpadPointNew = false;

//Ignoring all the LCD functions, they are not relevant for this, but they would be here


void Init()
	{
		//set up the outputs for the LCD
		DDRC = 0xFF;				//PORT C is all outputs for the LCD
		DDRG = DDRG | 0b00000111;	//PORT G pins 0, 1 and 2 are used as outputs for the LCD
		
		//PF6,PF5,PF4,PF3 are always inputs with pull-up
		DDRF = DDRF & 0b10000111;	//PF6,PF5,PF4,PF3 are inputs
		PORTF = PORTF | 0b01111000;	//PF6,PF5,PF4,PF3 have pullups
		
		//init the LCD
		LCD_init();
		
	}

int main(void)
{
	Init();
	
	while (true)
	{
		//Store the previous button states
		Numpad0Old = Numpad0New;
		Numpad1Old = Numpad1New;
		Numpad2Old = Numpad2New;
		Numpad3Old = Numpad3New;
		Numpad4Old = Numpad4New;
		Numpad5Old = Numpad5New;
		Numpad6Old = Numpad6New;
		Numpad7Old = Numpad7New;
		Numpad8Old = Numpad8New;
		Numpad9Old = Numpad9New;
		NumpadMinusOld = NumpadMinusNew;
		NumpadPointOld = NumpadPointNew;
		
		//Set all the "NumpadxNew" variables to false, if a button is pushed it will get overwritten to true
		//This is done to avoid writing lots of "if else"s
		Numpad0New = false;
		Numpad1New = false;
		Numpad2New = false;
		Numpad3New = false;
		Numpad4New = false;
		Numpad5New = false;
		Numpad6New = false;
		Numpad7New = false;
		Numpad8New = false;
		Numpad9New = false;
		NumpadMinusNew = false;
		NumpadPointNew = false;
		
		//set PF0 low to check the left col, PF1 and PF2 are high impedance
		DDRF = DDRF | 0b00000001;
		DDRF = DDRF & 0b11111001;
		
		PORTF = PORTF & 0b11111110;
		PORTF = PORTF | 0b00000110;
		
		
		if((PINF & 0b01000000) == false)
		{
			//Button 7 was pushed
			Numpad7New = true;
		}
		
		if((PINF & 0b00100000) == false)
		{
			//Button 4 was pushed
			Numpad4New = true;
		}
		
		if((PINF & 0b00010000) == false)
		{
			//Button 1 was pushed
			Numpad1New = true;
		}
		
		if((PINF & 0b00001000) == false)
		{
			//Button - was pushed
			NumpadMinusNew = true;
		}
		
		
		//set PF1 low to check the middle col, PF0 and PF2 are high impedance
		DDRF = DDRF & 0b11111010;
		DDRF = DDRF | 0b00000010;
		
		PORTF = PORTF & 0b11111101;
		
		
		
		
		if((PINF & 0b01000000) == false)
		{
			//Button 8 was pushed
			Numpad8New = true;
		}
		
		if((PINF & 0b00100000) == false)
		{
			//Button 5 was pushed
			Numpad5New = true;
		}
		
		if((PINF & 0b00010000) == false)
		{
			//Button 2 was pushed
			Numpad2New = true;;
		}
		
		if((PINF & 0b00001000) == false)
		{
			//Button 0 was pushed
			Numpad0New = true;
		}
		
		
		//set PF2 low to check the right col, PF0 and PF1 are high impedance
		DDRF = DDRF & 0b11111100;
		DDRF = DDRF | 0b00000100;
		
		PORTF = PORTF & 0b11111011;
		PORTF = PORTF | 0b00000011;
		
		
		if((PINF & 0b01000000) == false)
		{
			//Button 9 was pushed
			Numpad9New = true;
		}
		
		if((PINF & 0b00100000) == false)
		{
			//Button 6 was pushed
			Numpad6New = true;
		}
		
		if((PINF & 0b00010000) == false)
		{
			//Button 3 was pushed
			Numpad3New = true;
		}
		
		if((PINF & 0b00001000) == false)
		{
			//Button . was pushed
			NumpadPointNew = true;
		}
		
		//Detect rising edges
		if(Numpad0Old < Numpad0New)
		{
			//´Rising edge at button Numpad 0
			LCD_WriteString(0,0,"Button 0 was pushed");
		}
		if(Numpad1Old < Numpad1New)
		{
			//´Rising edge at button Numpad 1
			LCD_WriteString(0,0,"Button 1 was pushed");
		}
		if(Numpad2Old < Numpad2New)
		{
			//´Rising edge at button Numpad 2
			LCD_WriteString(0,0,"Button 2 was pushed");
		}
		if(Numpad3Old < Numpad3New)
		{
			//´Rising edge at button Numpad 3
			LCD_WriteString(0,0,"Button 3 was pushed");
		}
		if(Numpad4Old < Numpad4New)
		{
			//´Rising edge at button Numpad 4
			LCD_WriteString(0,0,"Button 4 was pushed");
		}
		if(Numpad5Old < Numpad5New)
		{
			//´Rising edge at button Numpad 5
			LCD_WriteString(0,0,"Button 5 was pushed");
		}
		if(Numpad6Old < Numpad6New)
		{
			//´Rising edge at button Numpad 6
			LCD_WriteString(0,0,"Button 6 was pushed");
		}
		if(Numpad7Old < Numpad7New)
		{
			//´Rising edge at button Numpad 7
			LCD_WriteString(0,0,"Button 7 was pushed");
		}
		if(Numpad8Old < Numpad8New)
		{
			//´Rising edge at button Numpad 8
			LCD_WriteString(0,0,"Button 8 was pushed");
		}
		if(Numpad9Old < Numpad9New)
		{
			//´Rising edge at button Numpad 9
			LCD_WriteString(0,0,"Button 9 was pushed");
		}
		if(NumpadMinusOld < NumpadMinusNew)
		{
			//´Rising edge at button Numpad -
			LCD_WriteString(0,0,"Button - was pushed");
		}
		if(NumpadPointOld < NumpadPointNew)
		{
			//´Rising edge at button Numpad .
			LCD_WriteString(0,0,"Button . was pushed");
		}
		
		//wait some time for the button to stop oscillating
		_delay_ms(DEBOUNCETIME);
	}
}