Firstly: Very nice work man :)Quote
enif
This describes a little DIY project I did for building a I2C based tiny full graphic controller using the SSD1306 128x64 OLED display.
This OLED display comes in two sizes, 0.96" and 1.3", and can be ordered on eBay for a few dollars. So far I only have the 0.96" version, but I have now ordered the 1.3" version. Fortunately, the SSD1306 interface is already supported in U8GLIB, so no programming is needed, just some configuation changes. Since the OLED display uses the I2C, only 4 wires (VCC, GND, SCL, SDA) are needed for the display itself. Add to that the 3 signals for the rotary encoder plus one signal for an (optional!) piezo buzzer, to a total need for only 8 wires. I found this especially useful for the Sanguinololu, where not so many additional pins are available.
Other advantages of the OLED display are that is really bright, does not need any fiddling with the contrast, only draws a total current of about 8mA and, last but not least, works with either 5V or 3.3V supply and signals - the latter being particularly interesting for ARM based controller boards.
For building the controller you need the following:
- an SSD1306 I2C 128x64 OLED display (available as 0.96" or 1.3" versions)
- a rotary encoder with integrated click switch
- a piezo buzzer (optional, just for audible feedback of click)
- a piece of prototype PCB board (about 1.5"x2.5" is enough)
- some wires and pin headers
Here first the schematic how I wired the components and connected them to either RAMPS or Sanguinololu..
The modifications to Marlin are only minimal changes in the files Configuration.h, Conditionals.h, dogm_lcd_implementation.h, pins_SANGUINOLOLU_11.h and pins_RAMPS_13.h. The attached patch file contains all the changes needed to the current version 1.0.3 of Marlin.
For those wanting printing from an SD-card (I don't), it is easy to add one of these cheap SPI based micro-SD modules that can be ordered on eBay for less than 2$, since the standards SPI pins used for the SD-cards are left untouched by the OLED display. Here pictures of my test using the tiny OLED controller together with an micro-SDcard module, on both RAMPS and Sanguinololu:
I know, buying a ready made 2004 or full graphic LCD controller is so cheap today, that you won't save any money by building things yourself. But that was not my aim for this project, rather my goal was (other than the fact that I really like tinkering) to have something really small, need only a minimum of cabling, draws only little current and is also working on 3.3V...
Anyone got it to Work with the new Marlin firmware, where the "Conditionals.h" file no longer exists?
I got it to Work successfully with previous versions of Marlin, but I can't seem to get it to work with the new layout.. anyone had any luck at this?
