Diff: main.cpp

Revision:

2:255d7e71c69b

Parent:

1:93eb2c653c86

Child:

3:664e38d7ae34

--- a/main.cpp	Thu Feb 12 21:11:49 2015 +0000
+++ b/main.cpp	Fri Feb 13 17:57:57 2015 +0000
@@ -1,5 +1,5 @@
 #include "mbed.h"
-
+//Right now this is only working for inputs length 3
 
 //Initialize PWM
 PwmOut PWM1(p21);
@@ -8,13 +8,15 @@
 
 
 //Initialize Input that is 8 character
-char input[8];
+char input[10];
 
   
  int main()
 {
+    //define input variables
     float freq;
     int dur;
+    //Check if input is valid
     int isint;
     while(1){
          
@@ -23,21 +25,25 @@
             {
                 //Input Desired Tone
                 printf("Input Desired Tone: Frequency (Hz) Duration (ms) followed by enter\r");
-                fgets(input, sizeof input, stdin);
-                isint = sscanf(input, "%3f %3d",&freq,&dur);
-                printf("isint = %d\r",isint);
+                fgets(input, sizeof input, stdin);  //input size length 9 followed by enter (xxxx xxxx/r)
+                isint = sscanf(input, "%f %d",&freq,&dur);      //assign input variables
+                printf("isint = %d\r",isint); //debug check if input is correct
+                //if input is incorrect this will be displayed
                 if(isint!= 2)
                 printf("You did not enter a number.Please enter an argument's number\r");
             
             }
         
           if(pc.readable()) {
-              //if enter is pressed continue 
+              //if enter is pressed continue to output tone
               if(pc.getc() == '\r')
              {
+                //show user what value was input
                 printf("Valid Input Frequency = %3.0f, Duration  = %d\r", freq, dur);
                 isint = 0;  //reset input
                 
+                //Play tone with correct freq and durration
+                //Timer used for duration
                 t1.reset();
                 t1.start();
                 PWM1.period(1/freq);               // set PWM period to 10 ms