The original zip file from Makeblock didn't work for me. (http://www.makeblock.cc/melephant-3d-printer/#comment-2264715033) This is a version with minor changes to make it compile using the Arduino IDE.
Install Arduino IDE (tested with version 1.6.7) Copy U8lib directory to Arduino/libraries folder Open Marlin/Marlin.ino using the Marlin IDE and compile/upload to mElephant 3D using USB cable
Reprap firmware based on Sprinter and grbl.
Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/. */
/* This firmware is a mashup between Sprinter and grbl. (https://github.com/kliment/Sprinter) (https://github.com/simen/grbl/tree)
It has preliminary support for Matthew Roberts advance algorithm http://reprap.org/pipermail/reprap-dev/2011-May/003323.html