Marco Antonini

Control your RepRap 3D printer with a touch

Another LCD for Marlin firmware?
Yes, my Melzi board is equipped with a atmega1284P, the only free pins (with 2 extruders) are TX1 and RX1.
This is perfect for a serial LCD like 4D-Systems uLCD-32PT. or uLCD-32PTU

Features:

• Work in standalone mode, no PC is required
• Intuitive Touch Interface, no external button is required
• Graphical interface “Pronterface” style
• Show SD card file content, print the selected file,Pause/Resume.
• Move X,Y,Z axis with a touch
• Show Temperature and Target Temp up to two Extruder
• Extrude/Reverse Filament functionality (Settings mm and mm/min)
• Set HotEnd Target Temp
• Set Bed Target Temp
• Zprobe and Z offset functionality
• Wav Sound to notify the end of print with a built-in speaker
• Only two pin for communication (TX1,RX1) ,perfect for Melzi/Sanguino board
• Works with a few changes to the Marlin firmware

Through a Slider, or two incremental buttons can be set :

• Teperature of the two extruders
• Bed temperature
• Length of filament to Extrude/Reverse
• Extruder Feedrate

Through the SD-card menu you can select a file to be printed, stop or resume printing.

The Z-menu allows you to enter an offset to calibrate the Z-home.
A button Z-Probe was inserted to allow you to probing the bed where the firmware allows it.

Preview	File STL
	4D LCD Cover front
	4D LCD Cover back

This case is only compatible with the uLCD-32PT

many users have adapted for the uLCD-32PTU models:

RepRapPro version:

• Alzibiff remix
• geezer2101 remix
• MrJohn remix
• henriksson19 remix

Prusa i3 version:

• litris remix

MendelMax version:

• Knimrod remix
• echenelly remix

This LCD works in standalone mode, it has an internal PICASO microcontroller.
The entire Graphics interface is not managed by Marlin Firmware but the PICASO micro.
My PICASO firmware send commands through the GCODE protocol to RepRap main board.
The communication is done by a second serial port.

A few changes are necessary for the Marlin firmware.
I added the LCD support code to my reprappro Marlin branch:

git clone git://github.com/MarcoAntonini/Marlin.git

Support for LCD can be extended to any branch Marlin.

The firmware to upload into the PICASO microcontroller is located in my github repo:

git clone git://github.com/MarcoAntonini/ReprRapLcd4D.git

This procedure shows how to compile and upload firmware on Picaso uLCD-32PT or uLCD-32PTU
Unfortunately, the 4D-Systems development environment only Windows supports. :(

• a 4D-Systems Display uLCD-32PT or uLCD-32PTU
• a microSD card for display formatted with FAT16 (256Mb is fine)
• a FTDI usb to serial converter (or equivalent)
• a 4D Workshop4 IDE Tool

1. Download and install the 4D Workshop4 IDE Tool.
   
2. Connect your LCD using the FTDI cable to the PC.
   
3. Clone my RepRapLCD4D Project
4. Copy the entire contents of the directory CopyToSD in the microSD.
   This is a precompiled image control database, if there are no changes to the graphical interface you can use these precompiled files.
5. Plug the microSD in the Display.
6. Open the 4D Workshop software and set the Display Serial port.
7. In the option tab, select FLASH destination ( otherwise the displays return error 8)
8. In the workshop open the file Main.4dg located in the root directory of my project, press the Compile & Download button.

At the end of the upload the mini pronterface graphical interface appears in the display.
The display is ready to work!

if the Graphical interface does not appear correctly, the problem can be caused by microSD.
Try to reformat or use the 4D-Systems Removable Media Partition Edit Tool

• uLCD-32PT product
• uLCD-32PT Datasheet
• PICASO GFX2 Datasheet
• PICASO GFX2 4DGL Internal Functions
• 4DGL Programmers Reference Manual
• 4D Workshop4 IDE Tool
• 4D WORKSHOP User Guide