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Dependencies:   TextLCD mbed

main.cpp@0:303fe443c3d4, 2015-10-21 (annotated)

Committer:
ibose3
Date:
Wed Oct 21 18:06:05 2015 +0000
Revision:
0:303fe443c3d4
Takes in light from a photocell and translates it to English characters on an LCD Screen

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ibose3 0:303fe443c3d4 1 #include "mbed.h"
ibose3 0:303fe443c3d4 2 #include "MorseCode.h"
ibose3 0:303fe443c3d4 3
ibose3 0:303fe443c3d4 4 DigitalOut LED(LED1); // LED that blinks every .5 seconds
ibose3 0:303fe443c3d4 5 PwmOut Speaker(p21); // Speaker
ibose3 0:303fe443c3d4 6 Timer Time;
ibose3 0:303fe443c3d4 7 AnalogIn photocell(p15); //CdS Powercell
ibose3 0:303fe443c3d4 8
ibose3 0:303fe443c3d4 9 int main() {
ibose3 0:303fe443c3d4 10 int up = 0;
ibose3 0:303fe443c3d4 11 int read = 0;
ibose3 0:303fe443c3d4 12 Speaker.period(1.0/800.0); //initializes speaker tone
ibose3 0:303fe443c3d4 13 Time.start(); //starts timer
ibose3 0:303fe443c3d4 14 int value = 0;
ibose3 0:303fe443c3d4 15
ibose3 0:303fe443c3d4 16 while(1) {
ibose3 0:303fe443c3d4 17
ibose3 0:303fe443c3d4 18 //Timer
ibose3 0:303fe443c3d4 19 if(Time.read_ms()%500<15) {
ibose3 0:303fe443c3d4 20 up = !up;
ibose3 0:303fe443c3d4 21 read = 0;
ibose3 0:303fe443c3d4 22 if((Time.read_ms() - 1740000) > 0) {
ibose3 0:303fe443c3d4 23 Time.reset();
ibose3 0:303fe443c3d4 24 }
ibose3 0:303fe443c3d4 25 wait_ms(15);
ibose3 0:303fe443c3d4 26 }
ibose3 0:303fe443c3d4 27
ibose3 0:303fe443c3d4 28 //LED
ibose3 0:303fe443c3d4 29 LED = (up)? 1 : 0; //LED blinks every other .5 second
ibose3 0:303fe443c3d4 30
ibose3 0:303fe443c3d4 31 //Reads in Morse Code
ibose3 0:303fe443c3d4 32 if(Time.read_ms()%500 > 250 && read == 0) { // .25 Second Has Passed
ibose3 0:303fe443c3d4 33 read = 1;
ibose3 0:303fe443c3d4 34 if (photocell.read() < 0.5) {
ibose3 0:303fe443c3d4 35 value = 0; //if the light is not on
ibose3 0:303fe443c3d4 36 } else {
ibose3 0:303fe443c3d4 37 value = 1; //if the light is on
ibose3 0:303fe443c3d4 38 }
ibose3 0:303fe443c3d4 39 MorseCode(value); //Translates the Morse code
ibose3 0:303fe443c3d4 40 }
ibose3 0:303fe443c3d4 41
ibose3 0:303fe443c3d4 42 //Speaker
ibose3 0:303fe443c3d4 43 if(value) {
ibose3 0:303fe443c3d4 44 Speaker = 0.1; //Plays tone if light is on
ibose3 0:303fe443c3d4 45 wait_ms(15);
ibose3 0:303fe443c3d4 46 }
ibose3 0:303fe443c3d4 47 else {
ibose3 0:303fe443c3d4 48 Speaker = 0.0; //Mutes tone if light is off
ibose3 0:303fe443c3d4 49 wait_ms(15);
ibose3 0:303fe443c3d4 50 }
ibose3 0:303fe443c3d4 51
ibose3 0:303fe443c3d4 52 }
ibose3 0:303fe443c3d4 53 }