source: rtos_arduino/trunk/arduino_lib/hardware/arduino/samd/cores/validation/validation_usb_host/test_usb_host.cpp@ 136

#include "variant.h"
#include <stdio.h>
#include <adk.h>

// Accessory descriptor. It's how Arduino identifies itself to Android.
char applicationName[] = "Arduino_Terminal"; // the app on your phone
char accessoryName[] = "Arduino Due X"; // your Arduino board
char companyName[] = "Arduino SA";

// Make up anything you want for these
char versionNumber[] = "1.0";
char serialNumber[] = "1";
char url[] = "http://labs.arduino.cc/uploads/ADK/ArduinoTerminal/ThibaultTerminal_ICS_0001.apk";

USBHost Usb;
ADK adk(&Usb, companyName, applicationName, accessoryName,versionNumber,url,serialNumber);

void setup()
{
        cpu_irq_enable();
        printf("\r\nADK demo start\r\n");
        delay(200);
}

#define RCVSIZE 128

void loop()
{
        uint8_t buf[RCVSIZE];
        uint32_t nbread = 0;
        char helloworld[] = "Hello World!\r\n";

        Usb.Task();

        if (adk.isReady())
        {
                /* Write hello string to ADK */
                adk.write(strlen(helloworld), (uint8_t *)helloworld);

                delay(1000);

                /* Read data from ADK and print to UART */
                adk.read(&nbread, RCVSIZE, buf);
                if (nbread > 0)
                {
                        printf("RCV: ");
                        for (uint32_t i = 0; i < nbread; ++i)
                        {
                                printf("%c", (char)buf[i]);
                        }
                        printf("\r\n");
                }
        }
}