Weird colors with esp32-8048S070C about esp32-smartdisplay HOT 15 CLOSED

Tried LVGL examples with the changes and it works.
Except for slight flickers...

Thanks to @rzeldent !

So guys, let's support or buy this guy a beer, without his efforts these boards will be
useless or extremely difficult to use. Looking at you Sunton.

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Hi Andre,

Looks like the LV_COLOR16_SWAP is incorrect.

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Yeah that's what i thought too but i already tried with swap enabled and get the same result.

I will try it again tomorrow and give you feedback.

Thanks for your help!

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It can be that you need to rebuild the library. The define is only taken into account when compiling thew library (that is cached).
Retry it but delete the .pio directory first. It is also possible that you need to change the settings in Squareline to be able to compile...
This should have been solved in the 2.0.x versions?!

from esp32-smartdisplay.

It can be that you need to rebuild the library. The define is only taken into account when compiling thew library (that is cached). Retry it but delete the .pio directory first. It is also possible that you need to change the settings in Squareline to be able to compile... This should have been solved in the 2.0.x versions?!

Ok i have tried with LV_COLOR_16_SWAP 1 but i get the same result. (i also have deleted the .pio folder before compiling)

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I have the same issue as this. Edited lv_conf.h and changed

#define LV_COLOR_16_SWAP 0

Did a PIO: Clean by clicking the trash can before uploading. Got the correct photo color,
but text are garbled and the colors for widgets are off.
eg. green border, greenish background, avocado button

esp32-8048S070C

Tried it on another device and it appears correct (set the swap var to 1 since SPI).

esp32-3248S035C

Not sure if related, but the downloaded library does not contain ST7701 files.

Thanks for the help and the great library!

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Hi IanSC,

Maybe the 16 bits color array is swapped, that's what I suspect. You can try to swap it by manually by setting in lvgl_rgb_panel.c the color 16 swap, just for testing:

// Create direct_io panel handle
#if LV_COLOR_16_SWAP != 0

Ordered the 8048S070C and will hopefully be able to reproduce it and correct it.

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Hi rzeldent,

A: lv_conf.h #define LV_COLOR_16_SWAP <value>
B: lvgl_rgb_panel.c, line 28 #if LV_COLOR_16_SWAP <operator> 0

Thanks for checking this out.

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Hi LanC,

Thanks for testing this. I was hoping it was just a typo... So basically the text is always garbled....
Have you tried inverting the image? esp_lcd_panel_invert_color(handle, true);

Hopefully will receive the board this week!

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Hi rzeldent,

Took me a while to figure out where to the add the line of code.

I also tried the other cases from your previous suggestion.
I doubted there would be any difference since it's a text issue not color,
but surprisingly it got much better.

Thanks again!

in lvgl_rgb_panel.c, added:
ESP_ERROR_CHECK(esp_lcd_panel_invert_color(panel_handle, true));
      at the end of the function lvgl_lcd_init()

A: lv_conf.h #define LV_COLOR_16_SWAP <value>
B: lvgl_rgb_panel.c, line 28 #if LV_COLOR_16_SWAP <operator> 0

CASE 1

CASE 2

CASE 3

CASE 4

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Additional Test:
Just reporting here to help solve any potential issues.
I don't remember the colors being so far off with the built in app
that came with the device.

TIP:
Don't use the included cable!
USB-C to USB-C does not work for me.
Use C to A, A to C cable. (Port is old USB in C form factor.)

These are not bug reports, just observations.
Big screen is yellowish and less brighter.
Added:

void setup() {
    ...
    smartdisplay_init();
    // smartdisplay_lcd_set_backlight(1.0f); // screen flickers
    // smartdisplay_lcd_set_backlight(0.9f); // screen flickers
    smartdisplay_lcd_set_backlight(0.5f);    // screen flickers
    ...
    tutorialCode();
}
void loop() {
    lv_timer_handler();
}

Changing the brightness causes the screen to flicker and become unstable, even if set to 0.5f
which is the same inside smartdisplay_init(). I might be calling it in the wrong place.

Button test seems normal, except for overlay.
Solid RGB colors are off.

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Hi rzeldent,

Based on:
Esp32-8048S070 display, different version
#90

I tried the settings for v1.3 and the text and colors are correct.

For noobs like me:

• make a copy of esp32-8048S070C.json inside board folder
• rename as, say esp32-8048S070C-v1.3.json
• edit and apply suggested changes in Issue #90
• edit platformio.ini and use board = esp32-8048S070C-v1.3
• rebuild

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Thanks!

BTW in the develop the v1.3 board will be the default. Think the v1.1 was some typo.

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Any idea on how to fix the screen flickers?

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Hi Optifine,

I think the PCLK needs tweaking....

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