Dram reduction possibility

[prashantchawla]

Hi Fbiego,

Great work - you have taken ESP32 development to next level. Thank you for making your work open source.

I was trying to make the project work for ESP32 Wroom display module. The compilation goes fine, but I get an error that the dram segment is overflowing by 49600 bytes.

I have tried to reduce the buffer size in a few places, but haven't been able to get any substantial reduction. Any direction to resolve this that you would be able to give will be appreciated.

[fbiego]

try reducing the lvgl buffer size, this will affect performance

esp32-c3-mini/include/lv_conf.h

Line 53 in b5a1ec7

#define LV_MEM_SIZE (120U*1024U)

try 70U*1024U

[prashantchawla]

Thank you, I was able to successfully compile and upload the build now. Had to reduce till 59U*1024U as was also messing around with some other buffers/caches in parallel.

The build starts fine and I can see the screen with heading 'ESP32 C3 Mini' and 4 icons. However, it just freezes there. Enabled logging for LVGL and found that it is getting out of memory error. Last few logs:

[Info] (3.962, +11) lv_qrcode_create: begin (in lv_qrcode.c line #61)
[Info] (3.987, +25) lv_label_create: begin (in lv_label.c line #75)
[Info] (3.990, +3) lv_obj_create: begin (in lv_obj.c line #215)
[Info] (3.991, +1) lv_img_create: begin (in lv_img.c line #60)
[Info] (4.003, +12) lv_qrcode_create: begin (in lv_qrcode.c line #61)
[Info] (4.021, +18) lv_label_create: begin (in lv_label.c line #75)
[Info] (4.023, +2) lv_obj_create: begin (in lv_obj.c line #215)
[Info] (4.024, +1) lv_img_create: begin (in lv_img.c line #60)
[Info] (4.036, +12) lv_qrcode_create: begin (in lv_qrcode.c line #61)
[Info] (4.036, +0) lv_mem_alloc: couldn't allocate memory (2858 bytes) (in lv_mem.c line #140)
[Info] (4.047, +11) lv_mem_alloc: used: 58292 ( 97 %), frag: 0 %, biggest free: 2124 (in lv_mem.c line #146)
[Error] (4.057, +10) lv_qrcode_constructor: Asserted at expression: buf != NULL (Out of memory) (in lv_qrcode.c line #196)

Any idea which buffer reduction would have caused this or how to proceed? Or taking a step back, if running with such constrained resources is even possible?

Again, thank you for the project and your help.

[fbiego]

You might want to check the latest push, the board config below disables custom watchface support and lowers mem size

esp32-c3-mini/platformio.ini

Line 167 in dfc427e

[env:esp32doit-devkit-v1]

[prashantchawla]

I am able to use the project fine on the screen now - but as you pointed out, performance is not the best.
Thanks @fbiego for your help.