After SDK update FPS dropped from 30 to 5

[Vadimatorik]

Answers checklist.

• I have read the documentation SiFli-SDK Programming Guide and the issue is not addressed there.
• I have updated my SiFli-SDK branch (main or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

I have a big project. The project:

1. Based on 523 microcontroller
2. Has LCD with QSPI
3. TTF fonts with GPU support (resource manager)
4. LVGL 9
5. Subproject EEZ Studio (0.23)
6. Reproduces a sequence of PNG files

The project is built on version 2.4 from github

For demonstration purposes I have created a test project for the eh-lb523 board (demo board):

test_gpu_app.zip

For the assembly:

1. Add 1 megabyte for LVGL 9 heap (It is not possible to set a heap for LVGL in PSRAM from menuconfig #173)
2. Enter the .\set_env.bat to the SDK root directory
3. Change the paths to Python (I recommend python 3.10 or higher) and EEZ Studio (version 0.23) in the file test_gpu_app\dependency\gui\config.json
4. Go to the test_gpu_app\mc_proj directory
5. Build a project scons --board=eh-lb523 -j12
6. Write firmwire .\build_eh-lb523_hcpu\uart_download.bat

Video:
https://drive.google.com/file/d/1AzO1BHrPrle08PxRdPoATWFZfG7-ohE6/view?usp=sharing

[rabbitsaviola]

which lvgl version do you use to achieve fps 30? lvgl v8?

[Vadimatorik]

which lvgl version do you use to achieve fps 30? lvgl v8?

Also LVGL 9. I think, that problem in fonts render

[Vadimatorik]

I think the project has 2 problems:

1. Font rendering has become slow
2. Loading png from NOR FLASH is slow

Can you suggest a solution to these problems?

[Vadimatorik]

I used this method and the FPS increased slightly (but still on the order of 20): #175

[amir1387aht]

I used this method and the FPS increased slightly (but still on the order of 20): #175

Another problem is you are using lvgl v9, v8 is better at performance, in sdk v2.4.2 with 2 inch display and lvgl 8 i get 60fps