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#include "mbed.h" #include "USBSerial.h" //Virtual serial port over USB USBSerial serial; DigitalOut l1(LED1); int main(void) { int i = 0; while(1) { l1 = !l1; printf("Hello\r\n"); serial.printf("I am a virtual serial port: %d\r\n", i++); wait(0.1); } }