ESP32 crashes when trying to display an jpg image with LVGL


Hi, I’m trying to display an image with LVGL on ESP32.
I have set up a proper File System for LVGL. The set source function works. but When I tried to align it somewhere in the middle of the screen, it just fails to do so and crashes.

I have tried to check the problem with the SD card, the path. It works with no problem, I have enabled LVGL debugging, and there was no errors.

Code to reproduce

void initLVGL() {
    lv_port_sd_fs_init();                                            //This one worked with no problem at all

    lv_disp_draw_buf_init(&draw_buf, buf1, NULL, TFT_WIDTH * TFT_HEIGHT / 10);  /*Initialize the display buffer.*/
    lv_disp_drv_init(&disp_drv);          /*Basic initialization*/
    disp_drv.flush_cb = my_disp_flush;    /*Set your driver function*/
    disp_drv.draw_buf = &draw_buf;        /*Assign the buffer to the display*/
    disp_drv.hor_res = TFT_WIDTH;   /*Set the horizontal resolution of the display*/
    disp_drv.ver_res = TFT_HEIGHT;   /*Set the vertical resolution of the display*/

    lv_disp_t *disp = lv_disp_drv_register(&disp_drv);

    lv_indev_drv_init(&indev_drv);             /*Basic initialization*/
    indev_drv.type = LV_INDEV_TYPE_POINTER;    /*Touch pad is a pointer-like device*/
    indev_drv.read_cb = my_touchpad_read;      /*Set your driver function*/
    lv_indev_drv_register(&indev_drv);         /*Finally register the driver*/

    disp->refr_timer->period = (uint32_t)(1000 / FPS); 

    //Set the background image
    lv_obj_t *theme = lv_img_create(lv_scr_act());
    lv_img_set_src(theme, "S:images/sir.jpg");
    lv_obj_align(theme, LV_ALIGN_CENTER, 0, 0);

ESP32 backtrace when crashes

Core  1 register dump:
PC      : 0x400ee06c  PS      : 0x00060930  A0      : 0x800ecad8  A1      : 0x3ffde9f0
A2      : 0x00000000  A3      : 0x00000000  A4      : 0x00000032  A5      : 0x00000009  
A6      : 0x00000008  A7      : 0x3ffc9c58  A8      : 0x0000ffff  A9      : 0x3ffc9cf4
A10     : 0x0000a759  A11     : 0x00000037  A12     : 0x3ffdea0c  A13     : 0x00000022
A14     : 0xffffffff  A15     : 0x00000018  SAR     : 0x0000001d  EXCCAUSE: 0x0000001c
EXCVADDR: 0x0000a75f  LBEG    : 0x400f4e6d  LEND    : 0x400f4e90  LCOUNT  : 0x00000002  

Backtrace: 0x400ee069:0x3ffde9f0 0x400ecad5:0x3ffdea30 0x400edc60:0x3ffdea50 0x400ec014:0x3ffdea70 0x400ec4ce:0x3ffdead0 0x400ec515:0x3ffdeaf0 0x400ec552:0x3ffdeb10 0x400efd8a:0x3ffdeb30 0x400f51f0:0x3ffdeb80 0x400d8c10:0x3ffdebb0 0x40116989:0x3ffdebd0

  #0  0x400ee069:0x3ffde9f0 in get_prop_core at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/core/lv_obj_style.c:602
      (inlined by) lv_obj_get_style_prop at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/core/lv_obj_style.c:229
  #1  0x400ecad5:0x3ffdea30 in lv_obj_get_style_border_width at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/core/lv_obj_style_gen.h:255
      (inlined by) lv_obj_get_scroll_bottom at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/core/lv_obj_scroll.c:149
  #2  0x400edc60:0x3ffdea50 in lv_obj_readjust_scroll at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/core/lv_obj_scroll.c:640
  #3  0x400ec014:0x3ffdea70 in lv_obj_refr_size at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/core/lv_obj_pos.c:203
      (inlined by) lv_obj_refr_size at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/core/lv_obj_pos.c:80
  #4  0x400ec4ce:0x3ffdead0 in layout_update_core at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/core/lv_obj_pos.c:1144
  #5  0x400ec515:0x3ffdeaf0 in layout_update_core at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/core/lv_obj_pos.c:1137 (discriminator 3)
  #6  0x400ec552:0x3ffdeb10 in lv_obj_update_layout at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/core/lv_obj_pos.c:316
      (inlined by) lv_obj_update_layout at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/core/lv_obj_pos.c:301
  #7  0x400efd8a:0x3ffdeb30 in _lv_disp_refr_timer at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/core/lv_refr.c:308
  #8  0x400f51f0:0x3ffdeb80 in lv_timer_exec at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/misc/lv_timer.c:313
      (inlined by) lv_timer_handler at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/misc/lv_timer.c:109
  #9  0x400d8c10:0x3ffdebb0 in loop() at .pio/libdeps/esp32doit-devkit-v1/lvgl/src/lv_api_map.h:37
      (inlined by) loop() at src/main.cpp:69
  #10 0x40116989:0x3ffdebd0 in loopTask(void*) at C:/Users/Admin/.platformio/packages/framework-arduinoespressif32/cores/esp32/main.cpp:50

ELF file SHA256: bc5d3a0d23459708

I appreciate any help!

Your code isnt clear and many issues maybe outside init , plus first test showing src included elementary objects. After this works show src included image and after this file images with decoders. Default jpg isnt supported without enable in conf usw.

1 Like

Thank you, I have checked the configuration file and found out:

  1. I haven’t enabled decoding
  2. I haven’t enabled LV_MEM_CUSTOM
    I did now, but even though it works with no problem/warnings/errors, It gives me a white blank image, which makes other UI widgets disappear.
    the image is PNG and the size is 40x40.

Code to reproduce is the same, just a little bit of modifications:

    //Set the background image
    lv_obj_t *theme = lv_img_create(lv_scr_act());
    lv_img_set_src(theme, "S:/images/sir.png");

I also tried .bin files and it is the same results