Integrating LVGL with AviPlayer using Arduino_GFX

How-to
,
1

Description

I’m using Arduino to compile for ESP32-S3 on my new favourite board, the JC3248W535C

LVGL version 8.4

I have a fully working version of @moononournation’s AviPlayer which uses Arduino_GFX.
Currently it plays all the files in a directory in random order.
https://github.com/richgain/play-random-video

I have designed a touch-screen enabled Episode Selector UI using LVGL. This is also working correctly, although nothing yet happens when the play button is pressed.
https://github.com/richgain/video-selector-interface

I want to combine the two programs together.

I managed to create a combined version which runs up to the point where the video should play, but then it crashes with a Guru Meditation error.
https://github.com/richgain/Play_selected_video

I would like to know if there are certain commands I should be using to free up memory and cleanly exit from the LVGL UI code, before running the Arduino_GFX code to play the video.

Code to reproduce

All code available on GitHub in the linked repositories.

Note that the two Core 1 register dumps are identical apart from PS : 0x00060c30 in the first one and PS : 0x00060430 in the second one, even though the Guru Meditation Error starts at different points in the Serial.print output.

15:02:38.200 -> Touchpad pressed: x=269, y=308
15:02:38.326 -> avi_open(/root/avi320x480/BP07.avi)
15:02:39.222 -> AVI avi_total_frames: 13142, 320 x 480 @ 15.00 fps, format: cvidGuru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled. 15:02:39.222 ->
15:02:39.222 -> Core 1 register dump:
15:02:39.222 -> PC : 0x4204d50a PS : 0x00060c30 A0 : 0x8204dbb2 A1 : 0x3fced170
15:02:39.222 -> A2 : 0x3fcec74c A3 : 0x3fcf1718 A4 : 0x3fc98ea0 A5 : 0x00000000
15:02:39.222 -> A6 : 0xa5a5a5a5 A7 : 0x3fc98ea8 A8 : 0x3fced2a0 A9 : 0x3fced280
15:02:39.222 -> A10 : 0x00000210 A11 : 0x00000000 A12 : 0x00000000 A13 : 0x00000140
15:02:39.222 -> A14 : 0x000001e0 A15 : 0x00000000 SAR : 0x0000000c EXCCAUSE: 0x0000001c
15:02:39.222 -> EXCVADDR: 0xa5a5a62d LBEG : 0x40056f08 LEND : 0x40056f12 LCOUNT : 0x00000000
15:02:39.222 ->
15:02:39.222 ->
15:02:39.222 -> Backtrace: 0x4204d507:0x3fced170 0x4204dbaf:0x3fced1a0 0x4204e4e0:0x3fced1d0 0x42032580:0x3fced1f0 0x420849d5:0x3fced210 0x4208454b:0x3fced230 0x420843a1:0x3fced260 0x4203136f:0x3fced280 0x42031395:0x3fced2a0 0x42003706:0x3fced2c0 0x42003909:0x3fced380 0x42006179:0x3fced3c0 0x42006245:0x3fced3e0 0x42006bca:0x3fced420 0x42007890:0x3fced450 0x420079e6:0x3fced470 0x42026335:0x3fced4b0 0x420263d9:0x3fced4d0 0x42005a88:0x3fced4f0 0x4037fff6:0x3fced510 15:02:39.222 ->
15:02:39.222 ->

OR

15:15:46.818 -> Touchpad pressed: x=233, y=308
15:15:46.897 -> avi_open(/root/avi320x480/BP03.avi)
15:15:47.804 -> AVI avi_total_frames: 13139, 320 x 480 @ 15.00 fps, format: cvid, estimateBufferSize: 61440, ESP.getFreeHeap(): 128808 15:15:47.804 -> Audio chaGuru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled. 15:15:47.804 ->
15:15:47.804 -> Core 1 register dump:
15:15:47.804 -> PC : 0x4204d50a PS : 0x00060430 A0 : 0x8204dbb2 A1 : 0x3fced170
15:15:47.804 -> A2 : 0x3fcec74c A3 : 0x3fcf1718 A4 : 0x3fc98ea0 A5 : 0x00000000
15:15:47.804 -> A6 : 0xa5a5a5a5 A7 : 0x3fc98ea8 A8 : 0x3fced2a0 A9 : 0x3fced280
15:15:47.804 -> A10 : 0x00000210 A11 : 0x00000000 A12 : 0x00000000 A13 : 0x00000140
15:15:47.804 -> A14 : 0x000001e0 A15 : 0x00000000 SAR : 0x0000000c EXCCAUSE: 0x0000001c
15:15:47.804 -> EXCVADDR: 0xa5a5a62d LBEG : 0x40056f08 LEND : 0x40056f12 LCOUNT : 0x00000000
15:15:47.804 ->
15:15:47.804 ->
15:15:47.804 -> Backtrace: 0x4204d507:0x3fced170 0x4204dbaf:0x3fced1a0 0x4204e4e0:0x3fced1d0 0x42032580:0x3fced1f0 0x420849d5:0x3fced210 0x4208454b:0x3fced230 0x420843a1:0x3fced260 0x4203136f:0x3fced280 0x42031395:0x3fced2a0 0x42003706:0x3fced2c0 0x42003909:0x3fced380 0x42006179:0x3fced3c0 0x42006245:0x3fced3e0 0x42006bca:0x3fced420 0x42007890:0x3fced450 0x420079e6:0x3fced470 0x42026335:0x3fced4b0 0x420263d9:0x3fced4d0 0x42005a88:0x3fced4f0 0x4037fff6:0x3fced510 15:15:47.804 ->
15:15:47.804 ->
2

Here’s a link to the JC3248W535C.

So, can it be done?? Can you mix LVGL code and Arduino_GFX code?

Here’s what I put in the Play button routine, where playEpisode(episode_num) is an Arduino_GFX routine:

        if (LV_ABS(diff_y) < 10) {
            lv_obj_t* label = lv_obj_get_child(child, 0);
            const char* btn_text = lv_label_get_text(label);
            int episode_num;
            sscanf(btn_text, "Episode %d", &episode_num);
            
            // Hide LVGL screen
            lv_obj_add_flag(lv_scr_act(), LV_OBJ_FLAG_HIDDEN);
            
            // Play the episode
            playEpisode(episode_num);
            
            // Show LVGL screen again
            lv_obj_clear_flag(lv_scr_act(), LV_OBJ_FLAG_HIDDEN);
            return;