I solved it. I think it’s a little bug.
I had a very strange problem and I couldn’t find out why. I hope you can take some time to look at it for me. Thank you.
I transplanted it according to the instructions, referring to “littlevgl/stm32f469_disco_no_os_sw4stm32”.
The specific function is as follows:
But I found through debugging that I did not call my custom touchpad_read function regularly.
I switched back to 5.3. Everything is normal and I can enter the function normally.
Problem was solved by original poster.