Screen corruption on file write with 8048S070C module

[AndyGadget]

Hi Francesco,
I'm seeing a screen image shifting to the right and down on every file.append command.
Here is a program demonstrating the problem.

ESP32-8048S070C module
Firmware is Annex32-S3 CAN DMT VGA HID OTG 1.70.52 qio opi LFS

Code: [Local Link Removed for Guests]

VGA.pinout 14, 21, 47, 48, 45, 9, 46, 3, 8, 16, 1, 15, 7, 6, 5, 4, 39, 40, 41, 42
VGA.delete
VGA.INIT 10
vga.image "/betweenthemountain.jpg"  ' 800x480 image
VGA.SHOW

pin.mode 2, output  ' backlight
pin(2) = 1

FName$ = "/text1.txt"

x =  file.delete(FName$)

do
  FLine$ = "This is a line of text" 
  for cnt = 1 to 5
    file.append FName$,FLine$ + chr$(10)
    pause 100
  next cnt  
  pause 1000
loop

[BeanieBots]

This is normal if you are writing to flash.
It does not happen when you write to SD card.

[cicciocb]

This is known "issue" and is not really a bug but more a system limitation.
Saving to the flash disk creates a conflict with the PSRAM where the video buffer is present (they share the same SPI bus).

Using the 2.xx versions this is improved but still present.

The solution is to use an SDCARD as, in this case, the problem doesn't happens.

In any case, I suggest to update the module at the latest version

[AndyGadget]

Thanks Francesco.
I think I may have missed something along the way. Has the VGA branch been discontinued in favour of LVGL as I can't see any reference to VGA in the 2.xx updates or those help files.

[cicciocb]

Thanks Francesco.
I think I may have missed something along the way. Has the VGA branch been discontinued in favour of LVGL as I can't see any reference to VGA in the 2.xx updates or those help files.

Yes, the VGA has been removed and now your module is supported natively just selecting it in the config page.

[AndyGadget]

Thanks. I'll start getting my head around LVGL then

[cicciocb]

Thanks. I'll start getting my head around LVGL then

No, you can continue as before if you want, simply replace the functions VGA.XXX with TFT.XXX.

BUT with LVGL is much better

[karlkloss]

No, you can continue as before if you want, simply replace the functions VGA.XXX with TFT.XXX.

I'm somewhat confused. There seems to be no 2.x firmware with VGA. Can I use LVGL with VGA?
If not, are you planning to add it sometime?

[cicciocb]

No, you can continue as before if you want, simply replace the functions VGA.XXX with TFT.XXX.

I'm somewhat confused. There seems to be no 2.x firmware with VGA. Can I use LVGL with VGA?
If not, are you planning to add it sometime?

No, the VGA analog output is not supported in the version 2.xx.
While I did create an experimental proof-of-concept version that worked, supporting VGA + LVGL would require too much effort.
I've already found my enjoyment in the creation process itself, and that's enough for me.
I've since moved on to other things and fighting on more interesting subjects (at least for me )