corrupted characters on LCD screen

[phongshader]

Issue description

characters on LCD screen are corrupted MKS Rumba32, REPRAP_DISCOUNT_SMART_CONTROLLER

Compile errors

none. I compiled several times to make sure this was not a one off.

Firmware version

MK4duo 4.4.0

My setup

The Beast V2, cartesian, MKS Rumba32, tmc5160, dual extruder, single nozzle, BLTouch clone Configuration_Overall.txt Configuration_Pins.txt

[phongshader]

There are plenty of other issues as well, BLTouch is not functioning as expected, heaters throwing errors and turning off, but I thought I would start with the lcd screen 1st so I can at least see what's going on. I replaced the clone with a genuine bltouch .

[MagoKimbra]

You must setting delay for you lcd and board. // // Display Full Graphics delay // //#define ST7920_DELAY_1 DELAY_NS(0) //#define ST7920_DELAY_2 DELAY_NS(0) //#define ST7920_DELAY_3 DELAY_NS(64)

Search online the valor for your display and board.

[phongshader]

I tried these settings 0,63,125 0,125,0 125,125,125 0,188,0 0,250,0 0,250,250 250,250,250 96,48,600 96,48,715 313,313,313 0,400,0 none fixed the screen, these are values found in Marlin and searches. Any other ideas?

[Kremptor]

Hi, I had the same problem with the Rumba32. Change the file 4203.h. in src / bords. At the end of the file you can set the delay values, it should look like this: // ### IF_BLOCKS

define ST7920_DELAY_1 DELAY_NS (350)

define ST7920_DELAY_2 DELAY_NS (350)

define ST7920_DELAY_3 DELAY_NS (350)

With this change, it worked for me. I tested six Display RepRapDiscount Full Graphic Smart Controllers with three Rumba32 boards, with two displays it worked without this change, with the others I had graphic problems.

[phongshader]

still corrupted when I made the changes in Configuration_Overall.h but was not corrupted when I made the changes in 4204.h Thank you!