Very weird LCD problem...


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phil99

Guru

Joined: 11/02/2018
Location: Australia
Posts: 1853
Posted: 03:40am 19 Apr 2024      

Setup an ILI9341 on a breadboard following your PCB tracks.
> Micromite MKII MMBasic Ver 5.05.05
Copyright 2011-2022 Geoff Graham

> GUI TEST LCDPANEL
> OPTION LIST
OPTION BAUDRATE 115200
OPTION LCDPANEL ILI9341, RLANDSCAPE, 26, 24, 0
>

And it works. Tried to make it fail by wiggling the jumpers. The only one that was touchy was Reset. Seems quite sensitive to noise so make sure you have 3.3V on the LCD panel Reset pin.
Maybe worth soldering a 10nF cap from Reset to Gnd. on top of the panel pins to ensure it has a clean 3.3V.