Diff: main.cpp

Revision:

1:85c6db66cc93

Parent:

0:6058d93885b8

--- a/main.cpp	Thu Jan 29 22:41:43 2015 +0000
+++ b/main.cpp	Sun Feb 08 16:44:43 2015 +0000
@@ -1,22 +1,32 @@
+//Part 5
+//The code below uses all previous parts of the lab to read
+//in the appropriate dot/dash input from the user and record them
+//and based on the input reference a table that maps the input
+//to a specific alphanumeric character
+
 #include "mbed.h"
 #include <map>
 #include <string>
 
+//Initialize Inturrupt
 InterruptIn pound(p25);
+//Initialize Digatl I/O
 DigitalOut myled(LED1);
 DigitalOut dot(p20);
 DigitalOut dash(p19);
-
+//Initialize Timer
 Timer t1;
 Timer t2;
-
+//Initialize Map
 std::map<std::string, char> asciiMap;
+//Serial Connection to view output
+Serial pc(USBTX, USBRX);
 
-Serial pc(USBTX, USBRX);
+//variables
 std::string curStr;
-
 int state = 0;
 
+//Mores Code -> Character Map
 void init(){
         asciiMap[".-"]='a';
         asciiMap["-..."]='b';
@@ -56,60 +66,67 @@
         asciiMap["-----"]='0';
 }
 
+//Function when button pressed
 void pPress () {
         t2.stop();
-                   
+            //Space identification is moved to while loop    
         t1.start();
-        myled = 1;
-        
+        myled = 1;        
     }
+//Function when button is released
 void pRelease() {
-        t1.stop();
+        t1.stop();     //stop dot dash timer
         if(t1.read_ms() > 30 && t1.read_ms() <= 200){
             dot = 0;
-            curStr = curStr + ".";
-            //pc.printf(".");
+            curStr = curStr + ".";   //add dot to curstring
         }
         else if (t1.read_ms() > 200) {
-            //dash= 0;
-            curStr = curStr + "-";
-            //pc.printf("-");
+            curStr = curStr + "-";   //add dash to curstring
         }
-        wait(0.1);
+        
+        wait(0.1);   //added for stability
+        
+        //Reset timers
         t1.reset();
         t2.reset();
+        //state recognizes when there has been an input
         state = 1;
-        
+        //Clear Outputs
         dot = 1;
-        //dash = 1;
+        dash = 1;
         myled = 0;
-        
+        //start space timer
         t2.start();
     }
 int main() {
+    //Initialize outputs
     init();
     dot=1;
     dash=1;
     myled = 0;
+    //Initialize Inturrupts
     pound.rise(&pPress);
     pound.fall(&pRelease);
-    t2.start();
+    t2.start();  //start space timer
     while(1) {
+         //used to light dass based on input length
         if(t1.read_ms()> 200) {
-            dash = 0;
+            dash = 0;     
             wait(0.1);
             dash = 1;
             }
+        //alphanumberic charact to be displayed
         char c;
         if(t2.read_ms() > 400 && state ==1) {
-            dot = 1;
+            //clear seven segment display
+            dot = 1;       
             dash= 1;
+            //map char based on string of dots and dashes
             c = asciiMap[curStr];
-            pc.printf("%s : %c",curStr,c);
-            curStr.clear();
-            pc.printf(" ");
-            state =0;
-            //pc.printf("%s",curStr);
+            pc.printf("%s : %c",curStr,c);  //print input and char
+            curStr.clear();                 //clear input
+            pc.printf(" ");                 //print space
+            state =0;                       //clear input state
         }
     }
 }
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