040000 tree e541409e85c8c66d1d77b7b692894f20c075a0ca	libboard_sam3s-ek
040000 tree 473d0de73f2dce521641a212a54adb195841a6ab	libchip_sam3s
040000 tree a659a658e74ecbb26f0f2db32d35731901b27ab3	usb