Just note to help anyone trying to find out if a RepRap Discount Full Graphic LCD ( [reprap.org] ) can definitely be used on a Melzi 2.0 running Marlin.
I had success today using a DIY adapter board found here on Thingiverse and credit should go to Dave for posting up his work there.
[www.thingiverse.com]
For whatever reason the information was hard to come by about any possible compatibility between this display and Melzi boards, in fact some sites or vendors say it's not compatible.
Doubts come about I think because the Melzi has less I/O lines extended to the external header sockets than RAMPS or Sanguinololu.
My display is actually a clone made by Geeetech, bought from Ebay for $15.
One comment of note is that the complied code with graphic LCD support was much larger than without and won't fit on the Atmega644 chip on original Melzi's, in fact it only fit on my Atmega1284P after I recommented out one of the SD card functions to save a few bytes.
Hope somebody finds this useful and saves some time for them.
Martin
[attachment 50475 GeeetechGLCDonMelzi.JPG]
I had success today using a DIY adapter board found here on Thingiverse and credit should go to Dave for posting up his work there.
[www.thingiverse.com]
For whatever reason the information was hard to come by about any possible compatibility between this display and Melzi boards, in fact some sites or vendors say it's not compatible.
Doubts come about I think because the Melzi has less I/O lines extended to the external header sockets than RAMPS or Sanguinololu.
My display is actually a clone made by Geeetech, bought from Ebay for $15.
One comment of note is that the complied code with graphic LCD support was much larger than without and won't fit on the Atmega644 chip on original Melzi's, in fact it only fit on my Atmega1284P after I recommented out one of the SD card functions to save a few bytes.
Hope somebody finds this useful and saves some time for them.
Martin
[attachment 50475 GeeetechGLCDonMelzi.JPG]