File content as of revision 0:7ac8f5f3e58b:

#include "mbed.h"
#include "DebouncedIn.h"
#include "TextLCD.h"

AnalogIn Vin(PTC2);
TextLCD lcd(PTB10, PTB11, PTE2, PTE3, PTE4, PTE5); // rs, e, d4-d7
DigitalOut l1(LED1);
DigitalOut l2(LED2);
DebouncedIn b1(PTC12);
DebouncedIn b2(PTC13);
DebouncedIn b3(PTA1);
int c1=0x0E,i,k=1;

int main()
{
    while(k==1) {
        lcd.cls();
        lcd.writeCommand(c1);
        lcd.locate(0,0);
        lcd.printf("SP= %d",i);
        lcd.locate(11,0);
        lcd.printf("KP= %d",i);
        lcd.locate(0,1);
        lcd.printf("Ki= %d",i);
        lcd.locate(11,1);
        lcd.printf("Kd= %d",i);

        while(k==1) {

            if(b1.falling()) {
                l1 = !l1;
                ++i;
                lcd.locate(3,0);
                lcd.printf("%d",i);
            }
            if (b2.falling() && i>=1) {
                l2 = !l2;
                --i;
                lcd.locate(3,0);
                lcd.printf("%d",i);
            }
            if (b3.falling()) {
                k+=1;
                i=0;
            }

        }


        while(k==2) {

            if(b1.falling()) {
                l1 = !l1;
                ++i;
                lcd.locate(14,0);
                lcd.printf("%d",i);
            }
            if (b2.falling() && i>=1) {
                l2 = !l2;
                --i;
                lcd.locate(14,0);
                lcd.printf("%d",i);
            }
            if (b3.falling()) {
                k+=1;
                i=0;
            }

        }


        while(k==3) {

            if(b1.falling()) {
                l1 = !l1;
                ++i;
                lcd.locate(3,1);
                lcd.printf("%d",i);
            }
            if (b2.falling() && i>=1) {
                l2 = !l2;
                --i;
                lcd.locate(3,1);
                lcd.printf("%d",i);
            }
            if (b3.falling()) {
                k+=1;
                i=0;
            }

        }


        while(k==4) {

            if(b1.falling()) {
                l1 = !l1;
                ++i;
                lcd.locate(14,1);
                lcd.printf("%d",i);
            }
            if (b2.falling() && i>=1) {
                l2 = !l2;
                --i;
                lcd.locate(14,1);
                lcd.printf("%d",i);
            }
            if (b3.falling()) {
                k=1;
                i=0;
            }
            continue;
        }

    }

}