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README.md

Marlin 3D Printer Firmware

Build Status Coverity Scan Build Status

Additional documentation can be found at the Marlin Home Page. Please test this firmware and let us know if it misbehaves in any way. Volunteers are standing by!

Marlin 2.0 Bugfix Branch

Not for production use. Use with caution!

Marlin 2.0 takes this popular RepRap firmware to the next level with support for much faster 32-bit processor boards.

This branch is for patches to the latest 2.0.x release version. Periodically this branch will form the basis for the next minor 2.0.x release.

Download earlier versions of Marlin on the Releases page.

Building Marlin 2.0

To build Marlin 2.0 you’ll need Arduino IDE 1.9 or PlatformIO. We’ve posted detailed instructions on how to build Marlin 2.0 for ARM.

Hardware Abstraction Layer (HAL)

Marlin 2.0 adds a new abstraction layer so that Marlin can build and run on 32-bit boards while still retaining full 8-bit AVR compatibility. In this way, features can be enhanced for more powerful platforms while still supporting AVR, whereas splitting up the code would make it harder to maintain and keep everything in sync.

Current HALs

name processor speed flash sram logic fpu
Arduino AVR ATmega, ATTiny, etc. 16-20MHz 64-256k 2-8k 5V no
Teensy++ 2.0 AT90USB1286 16MHz 128k 8k 5V no
Due, RAMPS-FD, etc. SAM3X8E ARM-Cortex M3 84MHz 512k 64+32k 3.3V no
Re-ARM LPC1768 ARM-Cortex M3 100MHz 512k 32+16+16k 3.3-5V no
MKS SBASE LPC1768 ARM-Cortex M3 100MHz 512k 32+16+16k 3.3-5V no
Azteeg X5 GT LPC1769 ARM-Cortex M3 120MHz 512k 32+16+16k 3.3-5V no
Selena Compact LPC1768 ARM-Cortex M3 100MHz 512k 32+16+16k 3.3-5V no
Teensy 3.5 ARM-Cortex M4 120MHz 512k 192k 3.3-5V yes
Teensy 3.6 ARM-Cortex M4 180MHz 1M 256k 3.3V yes

HALs in Development

name processor speed flash sram logic fpu
STEVAL-3DP001V1 STM32F401VE Arm-Cortex M4 84MHz 512k 64+32k 3.3-5V yes
Smoothieboard LPC1769 ARM-Cortex M3 120MHz 512k 64k 3.3-5V no

Submitting Patches

Proposed patches should be submitted as a Pull Request against the (bugfix-2.0.x) branch.

  • This branch is for fixing bugs and integrating any new features for the duration of the Marlin 2.0.x life-cycle.
  • Follow the Coding Standards to gain points with the maintainers.
  • Please submit your questions and concerns to the Issue Queue.

RepRap.org Wiki Page

Credits

The current Marlin dev team consists of:

License

Marlin is published under the GPL license because we believe in open development. The GPL comes with both rights and obligations. Whether you use Marlin firmware as the driver for your open or closed-source product, you must keep Marlin open, and you must provide your compatible Marlin source code to end users upon request. The most straightforward way to comply with the Marlin license is to make a fork of Marlin on Github, perform your modifications, and direct users to your modified fork.

While we can’t prevent the use of this code in products (3D printers, CNC, etc.) that are closed source or crippled by a patent, we would prefer that you choose another firmware or, better yet, make your own.