title: How to transmit data via USB HID(/dev/hidg0)?
body: <p>I'm using Atmel sama5d3x serials. I implement device to USB HID device (as keyboard). Already try the configuration of kernel for both USB HID to g_hid.o(built-in_ or g_hid.ko module), then Windows can identify as keyboard, event device has interface (<code>/dev/hidg0</code>) there.</p>
  
  <p>How can I transmit data via this interface?</p>
  
  <p>Kernel version : 3.14</p>