Diff: main.cpp

Revision:

4:dfb672184380

Parent:

3:7188bd978801

Child:

5:03b7c237c4c4

--- a/main.cpp	Mon Apr 14 00:33:00 2014 +0000
+++ b/main.cpp	Mon Apr 14 00:45:29 2014 +0000
@@ -8,23 +8,35 @@
 
 void sendText(char *thisText)
 {
+    // this can send any text
     usbSerial.printf(thisText);
 }
 //-----------------------------------------------------------------------------
 
 void sendHelloWorld()
 {
+    // sends the first greeting
     sendText("** Hello World **\n\n> ");
 }
 //-----------------------------------------------------------------------------
 
 void scanUSBSerialRx()
 {
+    // check if there is something to read
     if(usbSerial.readable()) {
+        
+        // if so ...
         char character = usbSerial.getc();
-        if((character == ';') || (character == 13)) usbSerial.printf("\n> ");
+        
+        // see if this is a semi colon or a carriage return
+        // if so, give a new line cursor
+        if((character == ';') || (charac ter == 13)) usbSerial.printf("\n> ");
+        
+        // if not, just print the character
         else usbSerial.printf("%c", character);        
     }
+    
+    // reset the flag
     scanUSBSerialRxFlag = false;
 }
 //-----------------------------------------------------------------------------
@@ -37,10 +49,13 @@
 
 void initMain()
 {
+    // increase the baud rate for the USB serial port
     usbSerial.baud(115200);
     
+    // send greeting with first cursor
     sendHelloWorld();
     
+    // start polling for characters
     scanTicker.attach(&setScanUSBSerialRxFlag, 0.01);
     scanUSBSerialRxFlag = false;
 }
@@ -49,8 +64,12 @@
 int main() {
     initMain();
     
-    while(true) { 
+    while(true) {
+        
+        // check the flag 
         if(scanUSBSerialRxFlag) scanUSBSerialRx();
+        
+        // give the main loop some time
         wait(0.02);
     }
 }