Data Streaming / Serialization

How-to
1

Before posting

Hello

Description

Data Streaming / Serialization

What MCU/Processor/Board and compiler are you using?

STM32F767

What LVGL version are you using?

7.10.0-dev

What do you want to achieve?

I make a GUI and user can change some setting of it, like color and so on. and i have different lv_style’s, now i need to save this lv_style’s or other setting part of lvgl to an external flash or I2C Serial EEPROM such as 24c64 and there needs to access BYTE level of lv_style(for example) to Write/Read—Save/Reload

How can i do it?

and some basic question’s:-------------------------------------------------------------------

  1. is there any c directives/functions to detect lvgl current version in real time and printf it?
  2. for now, my lvgl version is 7.10.0-dev. when i check online documentation latest ver. is v7.10.1-dev
    and release/v7 is v7.10.0 for this i think v7.10.0 is last stable version and i can use it for my project, is it true?
NO CODE
2

You would need to store the appropriate colors/integers to flash yourself. At the moment there is no functionality provided for serializing/deserializing styles.

Yes; you can use these defines:

That’s correct. release/xxx branches hold stable versions, master/latest is the next version to be released (which should also be stable enough for use), and dev is the bleeding-edge branch.

1 Like
3

Thank you.

4

Have you consider adding a macro that will construct a string representation of these values? E.g. “7.10.1”. It shouldn’t consume any resources if not used and will help users like me that want to display the LVGL version.

5

Any reason why you can’t use printf (or equivalent), since this would likely be for debug purposes only?