USB device stack; Added getter method for terminal_connected;

Fork of USBDevice by mbed official

Example of use:

#include "mbed.h"
#include "USBSerial.h"

USBSerial  pc;
DigitalOut blue_led(P0_20);

int main() {
    blue_led = 1;
    while(!pc.getTerminal_connected()); //Wait for serial terminal to connect...
    while(1) {
        blue_led = 0;
        wait(0.2);
        blue_led = 1;
        wait(0.2);
    }
}
Revision:
25:7c72828865f3
Parent:
1:80ab0d068708
--- a/USBDevice/USBDescriptor.h	Fri May 16 09:00:39 2014 +0100
+++ b/USBDevice/USBDescriptor.h	Tue Jun 03 11:30:32 2014 +0100
@@ -32,7 +32,7 @@
 
 
 /*string offset*/
-#define STRING_OFFSET_LANGID            (0) 
+#define STRING_OFFSET_LANGID            (0)
 #define STRING_OFFSET_IMANUFACTURER     (1)
 #define STRING_OFFSET_IPRODUCT          (2)
 #define STRING_OFFSET_ISERIAL           (3)