MM-control-01

MMU 3-axis stepper control

Building

Arduino

Recomended version is arduino 1.8.5.

Adding MMUv2 board

In Arduino IDE open File / Settings
Set Additional boards manager URL to:
https://raw.githubusercontent.com/prusa3d/Arduino_Boards/master/IDE_Board_Manager/package_prusa3d_index.json
Open Tools / Board: / Boards manager... Install Prusa Research AVR Boards by Prusa Research
which contains only one board:
Original Prusa i3 MK3 Multi Material 2.0

Select board Original Prusa i3 MK3 Multi Material 2.0

Bootloader binary is shipped with the board, source is located at https://github.com/prusa3d/caterina

Build

click verify to build

PlatformIO

PlatformIO build is not supported by Prusa Research, please report any PlatformIO related issues at https://github.com/awigen/MM-control-01/issues

Flashing

Windows

Arduino

click Upload

Slic3er

Hex file needs to be edited to be recognized as for MMUv2, to be specified later (in several years)

Avrdude

Board needs to be reset to bootloader. Bootloader has 5 seconds timeout and then returns to the application.

This can be accomplished manually by clicking reset button on MMU, or programmatically by opening and closing its virtual serial line at baudrate 1500.

Than flash it using following command, replace <virtual serial port> with CDC device created by MMU usually com<nr.> under Windows and /dev/ttyACM<nr.> under Linux. -b baud rate is don't care value, probably doesn't have to be specified at all, as there is no physical uart.

avrdude -v -p atmega32u4 -c avr109 -P <virtual serial port> -b 57600 -D -U flash:w:MM-control-01.ino.hex:i

Linux

Same as Windows, but there is known issue with ModemManager:

If you have the modemmanager installed, you either need to deinstall it, or blacklist the Prusa Research USB devices:

/etc/udev/rules.d/99-mm.rules

# Original Prusa i3 MK3 Multi Material 2.0 upgrade
ATTRS{idVendor}=="2c99", ATTRS{idProduct}=="0003", ENV{ID_MM_DEVICE_IGNORE}="1"
ATTRS{idVendor}=="2c99", ATTRS{idProduct}=="0004", ENV{ID_MM_DEVICE_IGNORE}="1"

$ sudo udevadm control --reload-rules

A request has been sent to Ubuntu, Debian and ModemManager to blacklist the whole Prusa Research VID space.

https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1781975

https://bugs.debian.org/cgi-bin/pkgreport.cgi?dist=unstable;package=modemmanager

and reported to https://lists.freedesktop.org/archives/modemmanager-devel/2018-July/006471.html

Building documentation

Run doxygen in MM-control-01 folder. Documentation is generated in Doc subfolder.