How to cut lvgl

[linda4185]

hello every body.

         I was get code by gui guider. and build, it is success.

         result of build by keil：Program Size: Code=166246 RO-data=34594 RW-data=520 ZI-data=56392

     I just add a button an text.  It is too bigger then my mcu internal flash.

           I try to remove some file but can not build the code.

            so how I do？any Documentation？

[zhenhualuo]

To reduce the image size, you can also try to use optimization options with size optimized. 

-O2: balance optimization for size and speed.

-Oz: size optimization, disregards performance optimization

[linda4185]

Thinks for reply.

   This  is an efficient and fast method but does not solve the problem at the source.

The reason is that will make some error when Optimization level set highest.

[zongchunyu]

Hello, 

To reduce the image size,  you can disable the unused widgets via the lv_conf.h file. 

for example, if you don't want to use the Image widget, you just need to update the following line in lv_conf.h:

#define LV_USE_IMG 1                       # change 1 to 0 can disable this widget

[linda4185]

thinks for reply

   I close all items except btn,and build project. the image size about 84KB，

   then set size optimized O3, it will be zoom out to 64KB，but I give up it. 

[brendonslade]

Hi Linda,

would you be able to share the project or a small test case that shows this so we can confirm the behavior?

thanks

[linda4185]

sorry sir

   I made a mistake，the image size is code+ROdata，I just calculate code size.

[linda4185]

yes.

 I will buil a new project when my program is done