Revision 0:303fe443c3d4, committed 2015-10-21

Comitter:

ibose3

Date:

Wed Oct 21 18:06:05 2015 +0000

Commit message:

Takes in light from a photocell and translates it to English characters on an LCD Screen

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MorseCode.cpp	Wed Oct 21 18:06:05 2015 +0000
@@ -0,0 +1,128 @@
+#include "mbed.h"
+#include "TextLCD.h"
+
+TextLCD lcd(p14, p16, p17, p18, p19, p20); 
+
+int Value = 0;
+int First = 1;
+int printSignal = 0;
+int clearSignal = 0;
+
+void printChar(int val) {
+    switch(val) {
+    case 0:
+        break;
+    case 184:
+        lcd.putc('a');
+        break;
+    case 3752:
+        lcd.putc('b');
+        break;
+    case 15080:
+        lcd.putc('c');
+        break;
+    case 936:
+        lcd.putc('d');
+        break;
+    case 8:
+        lcd.putc('e');
+        break;
+    case 2792:
+        lcd.putc('f');
+        break;
+    case 3816:
+        lcd.putc('g');
+        break;
+    case 680:
+        lcd.putc('h');
+        break;
+    case 40:
+        lcd.putc('i');
+        break;
+    case 48056:
+        lcd.putc('j');
+        break;
+    case 3768:
+        lcd.putc('k');
+        break;
+    case 2984:
+        lcd.putc('l');
+        break;
+    case 952:
+        lcd.putc('m');
+        break;
+    case 232:
+        lcd.putc('n');
+        break;
+    case 15288:
+        lcd.putc('o');
+        break;
+    case 12008:
+        lcd.putc('p');
+        break;
+    case 61112:
+        lcd.putc('q');
+        break;
+    case 744:
+        lcd.putc('r');
+        break;
+    case 168:
+        lcd.putc('s');
+        break;
+    case 56:
+        lcd.putc('t');
+        break;
+    case 696:
+        lcd.putc('u');
+        break;
+    case 2744:
+        lcd.putc('v');
+        break;
+    case 3000:
+        lcd.putc('w');
+        break;
+    case 15032:
+        lcd.putc('x');
+        break;
+    case 60344:
+        lcd.putc('y');
+        break;
+    case 15272:
+        lcd.putc('z');
+        break;
+    }
+}
+
+void MorseCode(int tick) {
+    if(tick) {
+        printSignal = 0;
+        clearSignal = 0;
+        
+        Value = Value << 1;
+        Value += 1;
+    }
+    else {
+        printSignal += 1;
+        clearSignal += 1;
+        
+        Value = Value << 1;
+    }
+    
+    if(First) {
+        lcd.cls();
+        First = 0;
+    }
+    
+    //Prints character after 3 ticks
+    if(printSignal == 3) {
+        printChar(Value);
+        printSignal = 0;
+        Value = 0;
+    }
+    
+    //Clears screen after 20 ticks
+    if(clearSignal == 20) {
+        lcd.cls();
+        clearSignal = 0;
+    }
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MorseCode.h	Wed Oct 21 18:06:05 2015 +0000
@@ -0,0 +1,1 @@
+void MorseCode(int tick);
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TextLCD.lib	Wed Oct 21 18:06:05 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/simon/code/TextLCD/#e4cb7ddee0d3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Oct 21 18:06:05 2015 +0000
@@ -0,0 +1,53 @@
+#include "mbed.h"
+#include "MorseCode.h"
+
+DigitalOut LED(LED1); // LED that blinks every .5 seconds
+PwmOut Speaker(p21); // Speaker
+Timer Time;
+AnalogIn photocell(p15); //CdS Powercell
+
+int main() {
+    int up = 0;
+    int read = 0;
+    Speaker.period(1.0/800.0);  //initializes speaker tone
+    Time.start();   //starts timer
+    int value = 0;
+    
+    while(1) {
+    
+        //Timer
+        if(Time.read_ms()%500<15) { 
+            up = !up;
+            read = 0;
+            if((Time.read_ms() - 1740000) > 0) {
+                Time.reset();
+            }
+            wait_ms(15);
+        }
+        
+        //LED
+        LED = (up)? 1 : 0;  //LED blinks every other .5 second
+        
+        //Reads in Morse Code  
+        if(Time.read_ms()%500 > 250 && read == 0) { // .25 Second Has Passed
+            read = 1;
+            if (photocell.read() < 0.5) {  
+                value = 0;      //if the light is not on
+            } else {
+                value = 1;      //if the light is on
+            }
+            MorseCode(value); //Translates the Morse code
+        }
+        
+        //Speaker
+        if(value) {
+            Speaker = 0.1;  //Plays tone if light is on
+            wait_ms(15);
+        }
+        else {
+            Speaker = 0.0; //Mutes tone if light is off
+            wait_ms(15);
+        }
+        
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Oct 21 18:06:05 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/34e6b704fe68
\ No newline at end of file