Alarm.cpp

00001 #include "mbed.h"
00002 PwmOut buzzer1(p21);
00003 PwmOut buzzer2(p22);
00004 DigitalOut led1(LED1);
00005 DigitalOut led3(LED3);
00006 bool go = true;  // variable to control if the alarm sounds
00007 Timeout reset;  // resets the alarm so that it will not sound in an endless loop
00008 
00009 float frequency[] = {262,0,262,0,262,0,349,0,523,0,466,0,440,0,392,0,698,0,523,0,466,0,440,0,392,0,698,0,523,0,466,0,440,0,466,0,392,0,/**/};
00010 float beat[] = {.3,0,.3,0,.3,0,2,0,2,0,.3,0,.3,0,.3,0,2,0,1,0,.3,0,.3,0,.3,0,2,0,1,0,.3,0,.3,0,.3,0,2,0/**/};
00011 float frequency2[] = {262,0,262,0,294,0,294,0,466,0,440,0,392,0,349,0,349,0,392,0,440,0,392,0,294,0,330,0,523,0,523,0,698,0,622,0,554,0,523,0,466,0,415,0,392,0,349,0,523,0};
00012 float beat2[] = {.75,0,.25,0,1.5,0,.5,0,.5,0,.5,0,.5,0,.5,0,.3,0,.3,0,.3,0,1,0,.5,0,1,0,.75,0,.25,0,1,0,.5,0,1,0,.5,0,1,0,.5,0,1,0,.5,0,4,0};
00013 
00014 void turn_on(void);  // Makes the alarm able to sound
00015 void turn_off(void); // Turns of the alarm sound
00016 
00017 void Sound_Alarm()
00018 {
00019     while(go)  // Plays Star Wars
00020     {
00021         led1 = !led1;
00022         wait(.5);
00023         
00024         for(int i=0; i<= 37;i++)
00025         {
00026             buzzer1.period(2/(frequency[i]));
00027             buzzer2.period(2/(frequency[i]));
00028             buzzer1 = 0.5;
00029             buzzer2 = 0.5;
00030             if(!go)
00031             {
00032                 buzzer1 = 0;
00033                 buzzer2 = 0;
00034                 reset.attach(&turn_on,60.0);   // Exit then Re-enable the alarm system after 60 seconds
00035                 break;
00036             }
00037             
00038             wait(0.4*beat[i]); 
00039             if(beat[i]==0)
00040             {wait(.05);}
00041           
00042         }
00043         
00044         for(int i=0; i<= 49;i++)
00045         {
00046             buzzer1.period(2/(frequency2[i]));
00047             buzzer2.period(2/(frequency2[i]));
00048             buzzer1 = 0.5;
00049             buzzer2 = 0.5;
00050             
00051             if(!go)
00052             {
00053                 buzzer1 = 0;
00054                 buzzer2 = 0;
00055                 reset.attach(&turn_on,60.0);  // Exit then Re-enable the alarm system after 60 seconds
00056                 break;
00057             }
00058             
00059             wait(0.4*beat2[i]); 
00060             if(beat2[i]==0)
00061             {wait(.05);}
00062           
00063         }
00064         
00065     }
00066         
00067 }    
00068 
00069 void turn_off()
00070 {
00071     go = false;
00072     led1 =0;
00073     led3 =0;    
00074 }
00075 
00076 void turn_on()
00077 {
00078     go = true; 
00079     led3 =1;     
00080 }
00081