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Scott Lahteine
2017-09-06 06:28:32 -05:00
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@@ -12,18 +12,38 @@ Please test this firmware and let us know if it misbehaves in any way. Volunteer
__Not for production use. Use with caution!__
This branch is used to accumulate patches to the latest 2.0.x release version. Periodically this branch will form the basis for the next minor 2.0.x release.
Marlin 2.0 is bringing open source RepRap firmware to the next level with support of 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](https://github.com/MarlinFirmware/Marlin/releases).
## Recent Changes
- Add a Hardware Abstraction Layer (HAL) supporting current AVR platforms
- Planning a HAL for Re:Arm
- Planning a HAL for STM32
## 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 the ability to build and run on 8-bit AVR. In this way, new features can be enhanced for more powerful platforms while still supporting AVR, whereas splitting up the code makes it hard to follow these changes and keep them in sync.
### Current HALs
name|processor|speed|flash|sram|logic|fpu
----|---------|-----|-----|----|-----|---
[Arduino AVR](https://www.arduino.cc/)|ATmega, ATTiny, etc.|16,20MHz|64-256k|2-8k|5V|no
[Teensy++ 2.0](http://www.microchip.com/wwwproducts/en/AT90USB1286)|[AT90USB1286](http://www.microchip.com/wwwproducts/en/AT90USB1286)|16MHz|128k|8k|5V|no
[Due](https://www.arduino.cc/en/Guide/ArduinoDue), [RAMPS-FD](http://www.reprap.org/wiki/RAMPS-FD), etc.|[SAM3X8E ARM-Cortex M3](http://www.microchip.com/wwwproducts/en/ATsam3x8e)|84MHz|512k|64+32k|3.3V|no
[Re-ARM](https://www.kickstarter.com/projects/1245051645/re-arm-for-ramps-simple-32-bit-upgrade)|[LPC1768 ARM-Cortex M3](http://www.nxp.com/products/microcontrollers-and-processors/arm-based-processors-and-mcus/lpc-cortex-m-mcus/lpc1700-cortex-m3/512kb-flash-64kb-sram-ethernet-usb-lqfp100-package:LPC1768FBD100)|100MHz|512k|32+16+16k|3.3-5V|no
[Teensy 3.5](https://www.pjrc.com/store/teensy35.html)|ARM-Cortex M4|120MHz|512k|192k|3.3-5V|yes
[Teensy 3.6](https://www.pjrc.com/store/teensy36.html)|ARM-Cortex M4|180MHz|1M|256k|3.3V|yes
### HALs in Development
name|processor|speed|flash|sram|logic|fpu
----|---------|-----|-----|----|-----|---
[STEVAL-3DP001V1](http://www.st.com/en/evaluation-tools/steval-3dp001v1.html)|[STM32F401VE Arm-Cortex M4](http://www.st.com/en/microcontrollers/stm32f401ve.html)|84MHz|512k|64+32k|3.3-5V|yes
[Smoothieboard](http://reprap.org/wiki/Smoothieboard)|LPC1769 ARM-Cortex M3|120MHz|512k|64k|3.3-5V|no
[MKS SBASE](http://forums.reprap.org/read.php?13,499322)|LPC1768 ARM-Cortex M3|100MHz|512k|32+16+16k|3.3-5V|no
## Submitting Patches
Proposed patches should be submitted as a Pull Request against this branch ([bugfix-2.0.x](https://github.com/MarlinFirmware/Marlin/tree/bugfix-2.0.x)).
Proposed patches should be submitted as a Pull Request against the ([bugfix-2.0.x](https://github.com/MarlinFirmware/Marlin/tree/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](http://marlinfw.org/docs/development/coding_standards.html) to gain points with the maintainers.