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ebbandflow
Regular Member

Joined: 31/08/2023
Location: United States
Posts: 46

Posted: 08:40pm 05 May 2026

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Hi all,

I am hitting a roadblock and thought I'd ask here because I must be doing something wrong. I'm setting up one of these newer waveshare RP2350-Touch-LCD-3.5 boards, and am having an odd issue with the BG color. I noticed it when trying to list the pins. The BG color of the display goes white after the initial print fills the screen, and then each new line is correct (white text on black BG) but turns white on white as soon as it scrolls up. This happens even on a fresh boot with no program loaded.

(edit: updated to add a gif)

> option list
PicoMite MMBasic RP2350B V6.02.00
OPTION SYSTEM SPI GP18,GP19,GP16
OPTION SYSTEM I2C GP34,GP35
OPTION FLASH SIZE 16777216
OPTION COLOURCODE ON
OPTION PICO OFF
OPTION CPUSPEED (KHz) 200000
OPTION LCDPANEL CONSOLE ,,,, 60
OPTION DISPLAY 26, 60
OPTION LCDPANEL ST7796S, RLANDSCAPE,GP20,GP23,GP21,GP22,INVERT
OPTION LCD BACKLIGHT 60
OPTION TOUCH FT6336 GP25,GP24,,50

Edited 2026-05-06 06:51 by ebbandflow

JohnS
Guru

Joined: 18/11/2011
Location: United Kingdom
Posts: 4313

Posted: 09:15pm 05 May 2026

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ebbandflow said (edit: updated to add a gif)

Just so you know, imgur is blocked in some countries, such as UK

John

ebbandflow
Regular Member

Joined: 31/08/2023
Location: United States
Posts: 46

Posted: 09:20pm 05 May 2026

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JohnS said

ebbandflow said (edit: updated to add a gif)

Just so you know, imgur is blocked in some countries, such as UK

John

Thank you for the heads-up John, I did not realize that! I tried to upload here but it rendered as a still image. Do you recommend any specific services that are more accessible?

Thanks,
James
Edited 2026-05-06 07:22 by ebbandflow

ebbandflow
Regular Member

Joined: 31/08/2023
Location: United States
Posts: 46

Posted: 09:28pm 05 May 2026

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This may be a workaround for those at their computers. Here is the .gif file, zipped up for uploading.
white-out.zip

mozzie
Senior Member

Joined: 15/06/2020
Location: Australia
Posts: 291

Posted: 05:43am 06 May 2026

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G'day James,
Been caught out by this one before, try:

OPTION LCDPANEL CONSOLE 1,,,60,NOSCROLL

If I have that correct it is:

OPTION LCDPANEL CONSOLE Font,F-colour,B-colour,B-light,NOSCROLL

NOSCROLL works for slower serial LCD's or for those that cannot be read from (ILI9488 etc). The other option is to use one of the buffered drivers.

Regards,
Lyle.
Edited 2026-05-06 15:49 by mozzie

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