Marlin firmware for Creality Ender-2

This builds Marlin firmware for Creality Ender-2 on Travis CI. The resulting firmware can be downloaded from here.

Changes

• Stock Marlin boot logo
• LIN_ADVANCE enabled
• S-curve acceleration enabled
• Filament change in the menu enabled
• Compiler optimizations for size enabled
• Optional part cooling fan runs at reduced speed to improve layer adhesion (I am using a Petsfang)

I use this with CreawsomeMod settings for Cura, but 130 mm/s printing speed (more may be possible).

Let me know if you would like to see additional changes.

Flashing with USBASP

• Connect USBASP to 6-pin header, DO NOT connect VCC from the USBASP to the printer. Have the printer powered by its PSU
• Backup the original firmware with sudo avrdude -p atmega1284p -c usbasp -F -U flash:r:factory.hex:i.
• Flash this firmware with sudo avrdude -p m1284p -c usbasp -F -U flash:w:'/home/me/Downloads/Marlin.ino.hex':i. A bootloader is not needed!