File content as of revision 0:6c9cb98ad497:

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

TextLCD lcd(PTB10, PTB11, PTE2, PTE3, PTE4, PTE5); // rs, e, d4-d7
int i,Sp=0,Kp,Ki,Kd;
DigitalOut l1(LED1);
DigitalOut l2(LED2);
int main()
{
    DebouncedIn button1(PTC12);
    DebouncedIn button2(PTC13);
    DebouncedIn button3(PTC16);
    lcd.writeCommand(0x0E);
    lcd.printf("Sp=     Kp=");
    lcd.locate(0,1);
    lcd.printf("Ki=     Kd=");
    lcd.locate(2,0);
    lcd.printf("=");

    while(1) {
    
        if(button1.falling()) {
                                        
            switch(i) {
                case 0:
                    lcd.locate(2,0);
                    lcd.printf("=     ");
                    lcd.locate(3,0);
                    lcd.printf("%d",++Sp);
                    
                    break;
                case 1:
                    lcd.locate(10,0);
                    lcd.printf("=     ");
                    lcd.locate(11,0);
                    lcd.printf("%d",++Kp);
                    break;
                case 2:
                    
                    lcd.locate(2,1);
                    lcd.printf("=     ");
                    lcd.locate(3,1);
                    lcd.printf("%d",++Ki);
                    break;
                case 3:
                    lcd.locate(10,1);
                    lcd.printf("=     ");
                    lcd.locate(11,1);
                    lcd.printf("%d",++Kd);
                    break;
            }
        }
        if(button2.falling()) {
            switch(i) {
                case 0:
                    if(Sp<0) {
                        Sp=0;
                    }
                    lcd.locate(2,0);
                    lcd.printf("=     ");
                    lcd.locate(3,0);
                    lcd.printf("%d",Sp--);
                    break;
                case 1:
                    if(Kp<0) {
                        Kp=0;
                    }
                    lcd.locate(10,0);
                    lcd.printf("=     ");
                    lcd.locate(11,0);
                    lcd.printf("%d",Kp--);
                    break;
                case 2:
                   
                    if(Ki<0) {
                        Ki=0;
                    }
                    lcd.locate(2,1);
                    lcd.printf("=     ");
                    lcd.locate(3,1);
                    lcd.printf("%d",Ki--);
                    break;
                case 3:
                   
                    if(Kd<0) {
                        Kd=0;
                    }
                    lcd.locate(10,1);
                    lcd.printf("=     ");
                    lcd.locate(11,1);
                    lcd.printf("%d",Kd--);
                    break;
            }
        }
        if(button3.falling()) {
            i++;
            if(i>3) {
                i=0;
            }
            switch (i) {
                case 0:
                    lcd.locate(2,0);
                    lcd.printf("=");
                    break;
                case 1:
                    lcd.locate(10,0);
                    lcd.printf("=");
                    break;
                case 2:
                    lcd.locate(2,1);
                    lcd.printf("=");
                    break;
                case 3:
                    lcd.locate(10,1);
                    lcd.printf("=");
                    break;
            }
        }       
    }
}