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Thread: Garbled LCD screens
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11-08-2014, 05:21 PM #1
I've used the trick maybe twice to recover from a garbled screen since I made the firmware change. Although the screen isn't readable when it occurs, I just hit the button on the smart panel and let Marlin time out and return to the main menu to reinitialize the display interface. I haven't described it in my MakerFarm i3v build thread yet, but I've also added a bezel over the LCD. I learned in other projects a long time ago that having these type of LCDs behind a bezel can do wonders in protecting them from going nuts after inadvertent static discharge.
As I update other projects using the LCDs in 4-bit transfer mode, I'll be looking for ways that I can automatically do the interface reinitialization periodically now that I understand how the data nibbles can get out of sync.
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