File content as of revision 0:1e3da2405347:

#include "mbed.h"                   // include the MBED library
#include "DigitDisplay.h" 
#include "Grove_LCD_RGB_Backlight.h"

DigitDisplay display(D2,D3); 
Serial blue(D1,D0); 
Grove_LCD_RGB_Backlight LCD(D14,D15);     // flash represents the LCD connect
Grove_LCD_RGB_Backlight flash(D14,D15);  
InterruptIn PIR(D6); 
char buf[20];
short motion_detected=0;
void LOW(void);
char bnum; 
int main()
{
                   // set button # to zero and shut off RGB leds
        
    while(1) {                  // set up infinte loop
         //button number
                if ((bnum>='1')&&(bnum<='4')) //is a number button 1..4
                {
                    switch(bnum)
                    {
                        case '1':   
                        
                        LCD.clear();
                        LCD.setRGB(0x00,0x80,0x00); //green lcd
                        LCD.locate(0,1);         //position for writing
                        printf(buf,"ARM ALARM  2");
                        
                        LCD.locate(1,1);              //position next line
                        printf(buf,"ALARM OFF  4");
                        
                                    break;
                        case '2': 
                        LCD.clear();
                        LCD.setRGB(0xff,0x00,0x00); //lcd red
                        LCD.locate(0,1);
                        printf(buf,"ALARM is ARMING");
                        printf(buf,"please leave Now");
                        
                        display.setBrightness(3);   //brightness
                        for (int count=10;count >0;count-- ) // count for 10 sec
                        {
                         display.write(count);
                         wait(1000);
                         }
                         
                        LCD.setRGB(0x00,0x80,0x00);     //lcd green
                        PIR.fall(&LOW);                         // connect code at LOW to IRQ
         
        if(motion_detected == 1)            // if motion detected
        {
            motion_detected=0;       // set variable to 0
            for(int Flash =0 ;Flash >5;Flash++){
            flash.setRGB(0xff,0xff,0xff);  // set LCD to white
             wait_ms(500);
            flash.setRGB(0xff,0x00,0x00); 
            }                               // set lcd to red // hold red colour for 0.5 seconds
              LCD.setRGB(0x80,0x00,0x80);
            printf(buf,"Alarm Sounding ");
            LCD.locate(1,1);
            printf(buf,"3 Disable ALarm");
            
        }
                          
                         break;
                         
                          
                        
                        case '3': 
                        LCD.clear();
                        LCD.setRGB(0x00,0x80,0x00);
                        LCD.locate(0,1);
                        printf(buf," ALARM DISARMED");
                        LCD.locate(1,1);
                        printf(buf,"2- ARM,   4- OFF");
                       // DigitDisplay::off();
                        
                          
                        case '4':  
                        LCD.setRGB(0x80,0x00,0x80);
                        LCD.locate(0,1);
                        printf(buf," ALARM IS about ");
                        LCD.locate(1,1);
                        printf(buf,"to Turn OFF ");
                         wait_ms(2000);
                         void displayOff();
                                    break;
                        
                        default:    
                                    
                                    break;
                                    
                    }
                }
            }
        }


void LOW(void)
{
   motion_detected=1;                       // motion_detected ==1 motion
}