This project is an effort to try to adapt the Anet ET4 motherboard and display for use with Marlin. Anyone can contribute to completing this project. Feedback is also welcome.
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DISCLAIMER: Not for production use. This is an unfinished project and under development. I am not responsible for what may happen to the motherboard or printer. Use only at your own risk.
Currently you can only flash this firmware using a flasher (stlink, jlink, bmp etc).
I recommend making a backup of your firmware. At least your bootlaoder (addresses from 0x08000000 to 0x08010000). This way, you can always recover/return to stock firmware by:
If you don’t perform this step, and, just in case of brick, there are copies of stock firmware ET4 releases and bootloader below on resources section.
This firmware lacks of bootloader, so you have to flash it from address 0x8000000.
You can connect with pronterface to corresponding com port @115200bps.
MCU: STM32F407VGT6 ARM CORTEX M4 => https://www.st.com/resource/en/datasheet/dm00037051.pdf
DRIVERS: TMC2208 (silent) / A4988 (noisy)
USB TO SERIAL CONVERTER: CH340G => https://www.mpja.com/download/35227cpdata.pdf
FLASH: WINBOND W25Q128JVSQ (128M-bit) Serial Flash memory => https://www.winbond.com/resource-files/w25q128jv%20revf%2003272018%20plus.pdf
EEPROM: AT24C04C (ATMLH744 04CM) 4 Kb =>https://datasheet.lcsc.com/szlcsc/1809192313_Microchip-Tech-AT24C04C-SSHM-T_C6205.pdf
LCD: ST7789V | STP320240_0280E2T (40P/1,5): ST7789 (YT280S008) => https://a.aliexpress.com/_dV4Bghv | https://www.crystalfontz.com/controllers/Sitronix/ST7789V/470/
TOUCH: XPT2046 => https://ldm-systems.ru/f/doc/catalog/HY-TFT-2,8/XPT2046.pdf
MOSFETS (BED/HOTEND): G90N04
CLK: JF8.000 (8MHZ MCU EXT CLK)
CLK: JF12.000 (12 MHZ USB-UART CLK)
SS56: SCHOTTKY DIODE
AMS1117 3.3 DN811: REGULATOR
XL2596S -5.0E1 83296: STEP DOWN DC CONVERTER 3A/150KHZ
293 STG9834 / LM293DT: 2x Voltage comparators => https://www.st.com/resource/en/datasheet/lm193.pdf
E-STEP => PB9
E-DIR => PB8
E-ENABLE => PE0
X-STEP => PB6
X-DIR => PB5
X-ENABLE => PB7
Y-STEP => PB3
Y-DIR => PD6
Y-ENABLE => PB4
Z-STEP => PA12
Z-DIR => PA11
Z-ENABLE => PA15
Y-LIMIT => PE12
X-LIMIT => PC13
Z-LIMIT => PE11
TEMP_BED => PA4
TEMP_EXB1 => PA1
END_FAN => PE1
LAY_FAN => PE3
END_CONTROL => PA0
BED_CONTROL => PE2
LV_DET => PC3
MAT_DET1 => PA2
POWER_LOSS_DET => PA8 (provided by ANET)
SDIO_D2 => PC10
SDIO_D3 => PC11
SDIO_CMD => PD2
SDIO_CLK => PC12
SDIO_D0 => PC8
SDIO_D1 => PC9
TF_DET => PD3
USB_USART1_TX => PA9
USB_USART1_RX => PA10
RESET_BTN => NRST (14)
LED_D2 => PD12
WINBOND_CS => PB12
WINBOND_DO => PB14
WINBOND_DI => PB15
WINBOND_CLK => PB13
EEPROM_A1 => GND
EEPROM_A2 => GND
EEPROM_SDA => PB11
EEPROM_SCL => PB10
P1_1_LCD_9_CSX => PD7
P1_2_LCD_11_WRX => PD5
P1_3_TOUCH_15_/CS => PB2
P1_4_TOUCH_14_DIN => PE5
P1_5_TOUCH_12_DOUT => PE4
P1_6_TOUCH_16_DCLK => PB0
P1_7_TOUCH_11_/PENIRQ => PB1
P1_8_LCD_12_RDX => PD4
P1_9 => GND
P1_10 => 3.3V
P2_1_LCD_15_RESX => PE6
P2_2_LCD_10_DCX => PD13
P2_3_LCD_26_DB9 => PD15
P2_4_LCD_25_DB8 => PD14
P2_5_LCD_28_DB11 => PD1
P2_6_LCD_27_DB10 => PD0
P2_7_LCD_30_DB13 => PE8
P2_8_LCD_29_DB12 => PE7
P2_9_LCD_32_DB15 => PE10
P2_10_LCD_31_DB14 => PE9
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!
Not for production use. Use with caution!
Marlin 2.0 takes this popular RepRap firmware to the next level by adding support for much faster 32-bit and ARM-based boards while improving support for 8-bit AVR boards. Read about Marlin’s decision to use a “Hardware Abstraction Layer” below.
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.
To build Marlin 2.0 you’ll need Arduino IDE 1.8.8 or newer or PlatformIO. We’ve posted detailed instructions on Building Marlin with Arduino and Building Marlin with PlatformIO for ReArm (which applies well to other 32-bit boards).
Marlin 2.0 introduces a layer of abstraction so that all the existing high-level code can be built for 32-bit platforms while still retaining full 8-bit AVR compatibility. Retaining AVR compatibility and a single code-base is important to us, because we want to make sure that features and patches get as much testing and attention as possible, and that all platforms always benefit from the latest improvements.
|Arduino AVR||ATmega, ATTiny, etc.||16-20MHz||64-256k||2-16k||5V||no|
|Arduino Due, RAMPS-FD, etc.||SAM3X8E ARM-Cortex M3||84MHz||512k||64+32k||3.3V||no|
|ESP32||Tensilica Xtensa LX6||240MHz||—||—||3.3V||—|
|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|
|Selena Compact||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|
|Smoothieboard||LPC1769 ARM-Cortex M3||120MHz||512k||64k||3.3-5V||no|
|Adafruit Grand Central M4||SAMD51P20A ARM-Cortex M4||120MHz||1M||256k||3.3V||yes|
|Arduino STM32||STM32F1 ARM-Cortex M3||72MHz||256-512k||48-64k||3.3V||no|
|Geeetech3D GTM32||STM32F1 ARM-Cortex M3||72MHz||256-512k||48-64k||3.3V||no|
|STEVAL-3DP001V1||STM32F401VE Arm-Cortex M4||84MHz||512k||64+32k||3.3-5V||yes|
|Teensy 3.5||MK64FX512VMD12 ARM-Cortex M4||120MHz||512k||192k||3.3-5V||yes|
|Teensy 3.6||MK66FX1M0VMD18 ARM-Cortex M4||180MHz||1M||256k||3.3V||yes|
Proposed patches should be submitted as a Pull Request against the (bugfix-2.0.x) branch.
The current Marlin dev team consists of:
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.