tpCalibrate

extern void writePoint3x3 (byte x, byte y, byte color);
extern void writeString(byte x, byte y, char string[]);

void tpCalibrate(byte *cal_x_min,  byte *cal_y_min, byte *cal_x_max,  byte *cal_y_max)
{
    static const char inf_esq[] = "Extrem inferior esquerra";
    static const char sup_dre[] = "Extrem superior dret";

    while (!tpPressDetect()) {
        clearGLCD(7, 7, 0, 127);
        writeString(3, 0, (char *)inf_esq);
        writePoint3x3(64, 0, 1);
        __delay_ms(10);
    }

    *cal_x_min = tpGetX();
    __delay_ms(1);
    *cal_y_min = tpGetY();

    while (tpPressDetect()) {
        __delay_ms(10);
    }


    while (!tpPressDetect()) {
        clearGLCD(7, 7, 0, 127);
        writeString(3, 0, (char *)sup_dre);
        writePoint3x3(0, 125, 1);
        __delay_ms(10);
    }

    *cal_x_max = tpGetX();
    __delay_ms(1);
    *cal_y_max = tpGetY();
};