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:
32:37f14e05bfd7
Parent:
11:eeb3cbbaa996
Child:
47:a0cd9646ecd1
--- a/USBSerial/USBSerial.cpp	Thu Aug 21 15:00:37 2014 +0100
+++ b/USBSerial/USBSerial.cpp	Mon Oct 06 11:00:28 2014 +0100
@@ -59,8 +59,6 @@
     //call a potential handler
     rx.call();
 
-    // We reactivate the endpoint to receive next characters
-    readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
     return true;
 }