lvgl LVGL 9 — ELECROW - FORUM https://forum.elecrow.com/index.php?p=/ Sat, 30 May 2026 05:35:37 +0000 en lvgl LVGL 9 — ELECROW - FORUM LVGL Ver.9 setup, specifically buffers.... https://forum.elecrow.com/index.php?p=/discussion/28088/lvgl-ver-9-setup-specifically-buffers Thu, 15 Jan 2026 21:22:36 +0000 Elecrow HMI Display MicroGuy 28088@/index.php?p=/discussions I've been working with LGVL ver9 on a 4" CYD, and (after much work) everything is running well.
But the end goal was to move onto the Elecrow 7" hmi display. I though it would be about the same....
I can't go back in lvgl versions, because I do not fancy having to learn all new (old) commands. I've got enough confusion points as it is.
So, does anybody have any working setup code for lvgl 9 on one of these displays? I finally got it to where it would compile without blowing up, but when I load it, it just resets continuously. It looks to be right at where the buffers are created after the "display" is created.
I have:

// disp = (SCREEN_WIDTH, SCREEN_HEIGHT, draw_buf, sizeof(draw_buf));
static uint8_t buf[800 * 480 / 10 * 2];
lv_display_t * disp = lv_display_create(800, 480);
Serial.print("display created");
lv_display_set_buffers(disp, buf, NULL, 76800, LV_DISPLAY_RENDER_MODE_PARTIAL);

Which is about as simple as I can get. There's no option in the lvgl_conf.h file for display chip settings (as there are for the smaller CYDs)
(even if I create buf1 and buf2, being the same setup, and use two buffers instead of the NULL, it still blows up, so that's not it)

Any help would be much appreciated. I've been fighting lvgl for weeks now. And Squareline only supports upto version 8 something, so that's not an option.

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