File content as of revision 49:243b5e826228:

#include "stdio.h"
#define PinXm A1
#define PinXp A0
#define PinYm A3
#define PinYp A2

#include "SPI_TFT_ILI9341.h"






// example to test the TFT Display from Mikroelectronika



// the display has a backlight switch on board
//DigitalOut LCD_LED(PTA4);   // may not be needed on mikroelectronika board
//DigitalOut pwr(PTD7); // ditto

// the TFT is connected to SPI pin 5-7
//SPI_TFT_ILI9341 TFT(p5, p6, p7, p8, p9, p10,"TFT"); // mosi, miso, sclk, cs, reset, dc for lpc1768
SPI_TFT_ILI9341 TFT(PTA16, PTA17, PTA15, PTD2, PTD4, PTA13, "TFT"); // mosi, miso, sclk, cs, reset, dc for frdmkl25z
//NB better combination to use a coherent 2x4 block for lcd
//   SPI_TFT_ILI9341 TFT(PTD2, PTD3, PTD1, PTA16, PTA17, PTC16,"TFT"); // mosi, miso, sclk, cs, reset, dc for frdmkl25z
//   DigitalOut LCD_LED(PTC17);
int touching = 0;

// Subroutine to read the x location of the touch point
// need to set x+ to 3V and ground x- then read analogue voltage on ym
//nb need to add a check for actual touch as opposed to random crap





int readY()
{
    int delta = 0, xv1 = 0, xv2 = 0, k = 0;
    int temp1 = 0, temp2 = 0;

    AnalogIn yp(PinYp);
    AnalogIn ym(PinYm);
    DigitalOut xp(PinXp);
    DigitalOut xm(PinXm);

    xp = 1; // set positive side of x high
    xm = 0;
    // dont need to do anyhting to set low side as it should be fine.
    // but do need to disconnect yp
    //yp.PinMode(PullNone)
    delta = 0;
    for(k = 0; k < 10; k++) { // make 10 readings to average
        temp1 = (int)ym.read_u16();
        temp2 = (int)yp.read_u16();
        xv1 += temp1;  // get value
        xv2 += temp2; // get other value
        delta += abs(temp1 - temp2) / 10; //gets individual differences
        // pc.printf("val1 = %d - val2 = %d-diff = %d\n\r",temp1,temp2,temp1-temp2);
        //observing behaviour when touching / nt touching

    }
    //delta=abs(xv2-xv1)/10;
    if(delta < 300) touching = 1;
    else touching = 0;
    //pc.printf("delta=%d \t %d\n\r",delta,touching);
    xp = 0;
    xm = 0;
    return (240 - (240 * ((xv2) / 1 / 10 - 5800)) / 51200); //returns the average of both
    //return(xv2/10); //maybe better to return the average of both....
}
// subroutine to read y values - has different pin functions ..
int readX()
{
    DigitalOut yp(PinYp);
    DigitalOut ym(PinYm);
    AnalogIn xp(PinXp);
    AnalogIn xm(PinXm);
    int delta = 0, yv1 = 0, yv2 = 0, k = 0;
    int temp1 = 0, temp2 = 0;
    yp = 1; // set positive sdie of x high
    ym = 0;
    // dont need to do anyhting to set low side as it should be fine.
    // but do need to disconnect yp
    //yp.PinMode(PullNone)
    delta = 0;
    for(k = 0; k < 10; k++) { // make 10 readings to average
        temp1 = (int)xm.read_u16();
        temp2 = (int)xp.read_u16();
        yv1 += temp1;  // get value
        yv2 += temp2; // get other value
        delta += abs(temp1 - temp2) / 10;
        //pc.printf("val1 = %d - val2 = %d-diff = %d\n\r",temp1,temp2,temp1-temp2);
    }
    //int yval=(int)xm.read_u16();  // get value
    //pc.printf("yval=%d",yval);
    yp = 0;
    ym = 0;
    return ((320 * ((yv2) / 1 / 10 - 3000)) / 58300);   // returns X
//    return(yval);

}