STM32L4R9 + touchgfx4.20 + MDK build error？

[zhuij.1]

Error: L6218E: Undefined symbol touchgfx::paint::rgb565::lineFromColor(unsigned short*, unsigned, unsigned, unsigned char, unsigned) (referred from painterrgb565.o).

How to resolve？

[Yoann KLEIN]

Hello @zhuij.1​ ,

I tried to reproduce your error, but everything worked fine for me when I started a STM32L4R9 project from scratch, generated code for MDK-ARM in CubeMX and then generated code in TouchGFXDesigner.

Could you please try to delete your Middlewares>ST folder, then press generate code in TouchGFXDesigner again. After that, please try to rebuild your MDK-ARM project and let me know if you still have the same issue.

Thank you,

/Yoann

[zhuij.1]

add the blow header,the error disappear

[RetroInTheShade]

Hi @zhuij.1​ ,

If you have just upgraded touchgfx from an earlier version, it would be also worthwhile looking at:

https://support.touchgfx.com/4.20/docs/miscellaneous/known-issues

This references this type of issue.

Cheers.