File content as of revision 2:d3a3a15016f3:

#include "mbed.h"
#include "TextLCD.h"
#include "Rtc_Ds1307.h"
#include "MaxSonar.h"

Rtc_Ds1307 rtc(PTE0, PTE1);
DigitalOut red(LED1);
TextLCD lcd(PTE5, PTE4, PTE3, PTE2, PTB11, PTB10); // rs, e, d4-d7
DigitalIn pin(PTE29); //button
Serial pc(USBTX, USBRX);
Rtc_Ds1307::Time_rtc tim = {};
Timer t;

void displayTime();

int main() {
    
    Ticker cloo; //declare a ticker to update clock every sec
    cloo.attach(&displayTime, 1); //the ticker runs the function that wipes the screen and displays the updated time
    
    rtc.startClock(); 
    
    MaxSonar *range;
    float r;
      
    range = new MaxSonar(MS_LV, MS_ANALOG, PTE23, PTC2);
    range->setVoltage(5);
    range->setUnits(MS_CM);
    
    range->triggerRead();
    wait_ms(49);
    r = range->read();
    
    while(1){
        
        wait_ms(50); //wait so button states do not overlap
        
        if(pin.read()){                     //once it's 1 start the detection loop to decide whether this is a hold or a double click
            
            cloo.detach();                  //stop the ticker while performing button operations
            
            t.reset();                     
            t.start();                      //start timer
            
            while(t.read() < 1){            //if it's not unpressed in a second - HOLD case
                                    
                if(!pin.read()){            //if it goes low, check for double click
                
                    t.reset();
               
                    while(t.read() < 1){      //listen for 1 sec for a second click
                    
                        if(pin.read()){          //if x = 1 execute DOUBLE CLICK - set alarm
                            lcd.cls();
                            lcd.printf("settin' alarm!");
                            wait(2);
                            break;
                        }
                    }
                break;
            }
        }
        
        
        
        while(pin.read()){                  //still pressed? Execute Button HOLD case, exit hold when no longer held
            
            rtc.getTime(tim);
            
            lcd.cls();
            lcd.printf("Today is the :\n%02d/%02d/%02d", tim.date, tim.mon, tim.year); //display date 
            wait(1);
            
        }
            
         cloo.attach(&displayTime, 1);      //re-enable ticker after date release   
         
    }
        
    t.stop();
    
    }
    
}

void displayTime(){ //get the time from the rtc chip and display it on the LCD
    
    Rtc_Ds1307::Time_rtc tm = tim;
    
    if (rtc.getTime(tm) ) {
        lcd.cls();
        lcd.printf("The time is :\n%02d:%02d:%02d", tm.hour, tm.min, tm.sec);
        }
     red = !red;   
    }