main.cpp

00001 #include "mbed.h"
00002 #include "MorseCode.h"
00003 
00004 DigitalOut LED(LED1); // LED that blinks every .5 seconds
00005 PwmOut Speaker(p21); // Speaker
00006 Timer Time;
00007 AnalogIn photocell(p15); //CdS Powercell
00008 
00009 int main() {
00010     int up = 0;
00011     int read = 0;
00012     Speaker.period(1.0/800.0);  //initializes speaker tone
00013     Time.start();   //starts timer
00014     int value = 0;
00015     
00016     while(1) {
00017     
00018         //Timer
00019         if(Time.read_ms()%500<15) { 
00020             up = !up;
00021             read = 0;
00022             if((Time.read_ms() - 1740000) > 0) {
00023                 Time.reset();
00024             }
00025             wait_ms(15);
00026         }
00027         
00028         //LED
00029         LED = (up)? 1 : 0;  //LED blinks every other .5 second
00030         
00031         //Reads in Morse Code  
00032         if(Time.read_ms()%500 > 250 && read == 0) { // .25 Second Has Passed
00033             read = 1;
00034             if (photocell.read() < 0.5) {  
00035                 value = 0;      //if the light is not on
00036             } else {
00037                 value = 1;      //if the light is on
00038             }
00039             MorseCode(value); //Translates the Morse code
00040         }
00041         
00042         //Speaker
00043         if(value) {
00044             Speaker = 0.1;  //Plays tone if light is on
00045             wait_ms(15);
00046         }
00047         else {
00048             Speaker = 0.0; //Mutes tone if light is off
00049             wait_ms(15);
00050         }
00051         
00052     }
00053 }