Any quick way to invert the lcd screen graphics?

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WorldScott
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31 Jan 2020 19:07 - 31 Jan 2020 19:10 #75864 by WorldScott

Any quick way to invert the lcd screen graphics? was created by WorldScott

I purchased this replacement lcd panel for my T8SG v1: www.aliexpress.com/item/33039792594.html (image attached). It produces graphics with a default black background thus producing white text. Is there any way to inverse Deviation's display to have it be the standard white background with black text?

Thank you,

-Scott

Last edit: 31 Jan 2020 19:10 by WorldScott.

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vlad_vy
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01 Feb 2020 06:28 - 01 Feb 2020 06:29 #75867 by vlad_vy

Replied by vlad_vy on topic Any quick way to invert the lcd screen graphics?

Display reverse is not supported by any way. You can build firmware by self with changed line of display code.

LCD_Cmd(0xA6); // Normal display
to
LCD_Cmd(0xA7); // Reverse display

for nightly builds it's
src\target\drivers\display\spi\128x64x1_nt7538.h

...
inline static void _lcd_init()
{
    volatile int i;
    LCD_Cmd(0xA6);      // Normal display
...

Last edit: 01 Feb 2020 06:29 by vlad_vy.

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WorldScott
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01 Feb 2020 13:54 - 01 Feb 2020 13:56 #75869 by WorldScott

Replied by WorldScott on topic Any quick way to invert the lcd screen graphics?

vlad_vy, thank you for your quick and helpful response. That seems fairly straightforward to do. I will see about pursuing that. For others wondering about this question I've also found that one can change from a positive to a negative image by changing the orientation of the polarizer on the lcd screen similar to this: