arduino-usb-host-barcode-scanner

#include <usbhid.h>
#include <hiduniversal.h>
#include <Usb.h>
#include <usbhub.h>
#include <hidboot.h>
USB Usb;
USBHub Hub(&Usb);
HIDUniversal Hid(&Usb);

class KbdRptParser : public KeyboardReportParser {
    void PrintKey(uint8_t mod, uint8_t key);
  protected:
    virtual void OnKeyDown  (uint8_t mod, uint8_t key);
    virtual void OnKeyPressed(uint8_t key);
};

void KbdRptParser::OnKeyDown(uint8_t mod, uint8_t key)
{
  uint8_t c = OemToAscii(mod, key);

  if (c)
    OnKeyPressed(c);
}

void KbdRptParser::OnKeyPressed(uint8_t key)
{
  Serial.print((char) key );
};

KbdRptParser Prs;

void setup()
{
  Serial.begin( 115200 );
  Serial.println("Start");

  if (Usb.Init() == -1) {
    Serial.println("OSC did not start.");
  }

  delay( 200 );

  Hid.SetReportParser(0, (HIDReportParser*)&Prs);
}

void loop()
{
  Usb.Task();
}