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#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()
{
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);
TP_X=tx/PREC_TOUCH_CONST;
TP_Y=ty/PREC_TOUCH_CONST;
}
bool available()
{
return digitalRead(T_IRQ) == 0;
}
int getX()
{
int value;
value = ((TP_X-PixOffsX)/PixSizeX);
if (value < 0)
value = 0;
return value;
}
int getY()
{
int value;
value = ((TP_Y-PixOffsY)/PixSizeY);
if (value < 0)
value = 0;
return value;
}
private:
int TP_X,TP_Y;
};
CTouch touch;
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