File content as of revision 2:478274cba6c3:

#include "mbed.h"
#include "SPI_TFT_ILI9341.h"
#include "Arial12x12.h"
#include "Arial28x28.h"
#include "touch_tft.h"
#include "USBMIDI.h"


// the TFT is connected to SPI pin 5-7
// the touch is connected to 19,20,16,17

touch_tft tft(p20,p19,p18,p17,p5, p6, p7, p14, p15, p21, "TFT"); // x+,x-,y+,y-,mosi, miso, sclk, cs, reset, dc


void buttons(int b, unsigned short color) {            //button field
        
        if (b == 1) { 
            tft.fillrect(3,88,78,158,color); 
        }
        if (b == 2) {
            tft.fillrect(83,88,158,158,color);            
        }
        if (b == 3) {
            tft.fillrect(163,88,238,158,color); 
        }
                           
        if (b == 4) {
            tft.fillrect(3,163,78,238,color);
        }
        if (b == 5) {       
            tft.fillrect(83,163,158,238,color); 
        }            
        if (b == 6) {     
            tft.fillrect(163,163,238,238,color);
        }   
             
        if (b == 7) {
            tft.fillrect(3,243,78,318,color);
        }     
        if (b == 8) {
            tft.fillrect(83,243,158,318,color); 
        }
        if (b == 9) {
            tft.fillrect(163,243,238,318,color);
        }
        
}

void draw_buttons(unsigned short color) {
                
                unsigned int i = 1;
                
                for (i = 1; i<10; i++){                                         //draw buttons
                buttons(i, color);
                }
                
}

void light_pressed(unsigned short color, point p)
{
    
    if (p.y > 88 && p.y < 158) {            //ROW A
        if (p.x > 3 && p.x < 78) {          //button 1
            buttons(1, color);
        }
        if (p.x > 83 && p.x < 158) {        //button 2
            buttons(2, color);
        }
        if (p.x > 163 && p.x < 238) {       //button 3
            buttons(3, color);
        }
    }

    if (p.y > 163 && p.y < 238) {           //ROW B
        if (p.x > 3 && p.x < 78) {          //button 4
            buttons(4, color);
        }
        if (p.x > 83 && p.x < 158) {        //button 5
            buttons(5, color);
        }
        if (p.x > 163 && p.x < 238) {       //button 6
            buttons(6, color);
        }
    }

    if (p.y > 243 && p.y < 318) {           //ROW C
        if (p.x > 3 && p.x < 78) {          //button 7
            buttons(7, color);
        }
        if (p.x > 83 && p.x < 158) {        //button 8
            buttons(8, color);
        }
        if (p.x > 163 && p.x < 238) {       //button 9
            buttons(9, color);
        }
    }
}

int main() {    
    
    // PERUSPOHJA, ÄLÄ MUOKKAA!
    
    point p;
    unsigned short color = White;

    tft.claim(stdout);        // send stdout to the TFT display
    tft.background(Black);    // set background to black
    tft.foreground(White);    // set chars to white
    tft.cls();                // clear the screen
    tft.set_font((unsigned char*) Arial12x12);  // select the font
    
    tft.set_orientation(0);
    tft.calibrate();
    
    
    tft.locate(180,0);          //show coordinates
    printf(" x = ");
    tft.locate(180,12);
    printf(" y = ");  
    
    tft.locate(0,0);
    printf(" MIDIMAN! "); 
    tft.line(0,83,239,83,White);   
    
    while (1) {
        
        color = White;
        draw_buttons(color);        
        
        while (tft.is_touched(tft.get_touch())) {                       // touch
            p = tft.get_touch();        
            p = tft.to_pixel(p);                                       // convert to pixel position
            
            light_pressed(Red,p);                                         // light pressed button
            
            tft.locate(216,0);
            printf("%3d",p.x);
            tft.locate(216,12);
            printf("%3d",p.y);    

        }         
    }  
    
              
}