LVGL on GIGA seems to be running out of memory - lvgl sketch doesnt fit.

[mjs513]

@facchinm - @pillo79 - @KurtE

We modified our gigadisplay library to include the LVGL 9.3.0 code from the Arduino_H7_library, i.e., code wrapped in #if __has_include("lvgl.h"). It now compiles the grid example:

#if __MBED__
#include "Arduino_H7_Video.h"
#include "lvgl.h"
#include "Arduino_GigaDisplayTouch.h"

Arduino_H7_Video Display(800, 480, GigaDisplayShield);
Arduino_GigaDisplayTouch TouchDetector;
#elif __ZEPHYR__
#include "lvgl.h"
#include "Arduino_GigaDisplay.h"

Display Display(800, 480);
#endif

void setup() {
  delay(3000);
  Display.begin();

  //Display & Grid Setup
  lv_obj_t* screen = lv_obj_create(lv_scr_act());
  lv_obj_set_size(screen, Display.width(), Display.height());

  static lv_coord_t col_dsc[] = { 370, 370, LV_GRID_TEMPLATE_LAST };
  static lv_coord_t row_dsc[] = { 215, 215, 215, 215, LV_GRID_TEMPLATE_LAST };

  lv_obj_t* grid = lv_obj_create(lv_scr_act());
  lv_obj_set_grid_dsc_array(grid, col_dsc, row_dsc);
  lv_obj_set_size(grid, Display.width(), Display.height());

  //top left
  lv_obj_t* obj;
  obj = lv_obj_create(grid);
  lv_obj_set_grid_cell(obj, LV_GRID_ALIGN_STRETCH, 0, 1,  //column
                       LV_GRID_ALIGN_STRETCH, 0, 1);      //row

  //bottom left
  obj = lv_obj_create(grid);
  lv_obj_set_grid_cell(obj, LV_GRID_ALIGN_STRETCH, 0, 1,  //column
                       LV_GRID_ALIGN_STRETCH, 1, 1);      //row
  //top right
  obj = lv_obj_create(grid);
  lv_obj_set_grid_cell(obj, LV_GRID_ALIGN_STRETCH, 1, 1,  //column
                       LV_GRID_ALIGN_STRETCH, 0, 1);      //row

  //bottom right
  obj = lv_obj_create(grid);
  lv_obj_set_grid_cell(obj, LV_GRID_ALIGN_STRETCH, 1, 1,  //column
                       LV_GRID_ALIGN_STRETCH, 1, 1);      //row
}

void loop() {
  lv_timer_handler();
  delay(5);

}

However, it fails to load the sketch with the following error:

uart:~$ sketch
[00:00:07.672,000] <err> llext: Failed allocating 499264 bytes 4-aligned for region 0
[00:00:07.680,000] <err> llext: Failed to copy regions, ret -12
Failed to load sketch, rc -12

so at this point not sure what can be done.

To run the sketch you will need the library: https://github.com/mjs513/Arduino_GigaDisplay/tree/Arduino_GigaDisplay_Zephyr

[KurtE]

@mjs513 and all.

Wondering about the memory management and usage of memory.
For example, today I am playing with the Portenta H7, with an ST77XX SPI display driver which is starting to work...

But is so limited in memory, that I can not load a single ILI9341 like font in the different examples without the sketch failing
to load with errors like:

uart:~$
*** Booting Zephyr OS build v3.7.0-16361-gcd0993ba3220 ***
[00:00:00.207,000] <err> llext: Failed allocating 131072 bytes 131072-aligned for region 2
[00:00:00.218,000] <err> llext: Failed to copy regions, ret -12
Failed to load sketch, rc -12
uart:~$

Not sure what to do about it, but would be nice if:
a) the summary of a build that may say something like:

Sketch uses 28120 bytes (3%) of program storage space. Maximum is 786432 bytes.
Global variables use 2384 bytes (0%) of dynamic memory, leaving 521240 bytes for local variables. Maximum is 523624 bytes.
Performing 1200-bps touch reset on serial port COM23

That the sizes and summary would match up, with what actually can be loaded.

b) Wondering if it is possible with Arduino/Zephyr/ST77XX - to do like we can do with a Teensy and tell certain things like
font tables to not copy it down from flash to memory, but instead access it directly from flash...

Back to playing

EDIT: Was able to get some of the font test sketch working but only with GFX fonts as they are smaller... Only one
size per file

[mjs513]

@KurtE - @facchinm - @pillo79

Been playing a bit more and trying to debug whats going on with lvgl.

First think is that I dont understand why with MBed I can do

#include "Arduino_H7_Video.h"
#include "lvgl.h"

and it uses lvgl_config in the library folder but with Zephyr I have

#include "lvgl.h"
#include "Arduino_GigaDisplay.h"

and put lvgl_config files in the arduino libraries folder next to where lvgl is installed? Have a horrible feeling lvgl is not using sdram as memory