#define T_CLK 6
#define T_CS 5
#define T_DIN 4
#define T_DOUT 3
#define T_IRQ 2

#define X_CONST 240
#define Y_CONST 320

#define PREC_TOUCH_CONST 10

#define PixSizeX	13.78
#define PixOffsX	411

#define PixSizeY	11.01
#define PixOffsY	378

class CTouch {
public:
	void init(void)
	{
		pinMode(T_CLK,  OUTPUT);
		pinMode(T_CS,   OUTPUT);
		pinMode(T_DIN,  OUTPUT);
		pinMode(T_DOUT, INPUT);
		pinMode(T_IRQ,  INPUT);

		digitalWrite(T_CS,  HIGH);
		digitalWrite(T_CLK, HIGH);
		digitalWrite(T_DIN, HIGH);
		digitalWrite(T_CLK, HIGH);
	}

	void writeData(unsigned char data)
	{
		unsigned char temp;
		unsigned char nop;
		unsigned char count;

		temp=data;
		digitalWrite(T_CLK,LOW);

		for(count=0; count<8; count++)
		{
			if(temp & 0x80)
				digitalWrite(T_DIN, HIGH);
			else
				digitalWrite(T_DIN, LOW);
			temp = temp << 1; 
			digitalWrite(T_CLK, LOW);                
			nop++;
			digitalWrite(T_CLK, HIGH);
			nop++;
		}
	}

	unsigned int readData()
	{
		unsigned char nop;
		unsigned int data = 0;
		unsigned char count;
		for(count=0; count<12; count++)
		{
			data <<= 1;
			digitalWrite(T_CLK, HIGH);               
			nop++;
			digitalWrite(T_CLK, LOW);
			nop++;
			if (digitalRead(T_DOUT))
				data++;
		}
		return(data);
	}

	void read(int& x, int& y)
	{
		unsigned long tx=0;
		unsigned long ty=0;

		digitalWrite(T_CS,LOW);                    

		for (int i=0; i<PREC_TOUCH_CONST; i++)
		{
			writeData(0x90);        
			digitalWrite(T_CLK,HIGH);
			digitalWrite(T_CLK,LOW); 
			ty+=readData();

			writeData(0xD0);      
			digitalWrite(T_CLK,HIGH);
			digitalWrite(T_CLK,LOW);
			tx+=readData();
		}

		digitalWrite(T_CS,HIGH);
                x = (tx / PREC_TOUCH_CONST - PixOffsX) / PixSizeX;
                y = (ty / PREC_TOUCH_CONST - PixOffsX) / PixSizeX;
	}

	bool available()
	{
		return digitalRead(T_IRQ) == 0;
	}
};

CTouch touch;