GUI GuiderのトピックRe: How to cut lvgl

How to cut lvgl

linda4185 — Wed, 04 May 2022 06:12:19 GMT

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？

zongchunyu — Thu, 05 May 2022 08:22:53 GMT

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

zhenhualuo — Thu, 05 May 2022 08:59:05 GMT

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 — Thu, 05 May 2022 09:26:56 GMT

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.

linda4185 — Thu, 05 May 2022 09:30:26 GMT

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.

brendonslade — Sat, 07 May 2022 00:07:05 GMT

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 — Mon, 09 May 2022 14:08:49 GMT

yes.

I will buil a new project when my program is done

linda4185 — Tue, 10 May 2022 06:43:03 GMT

sorry sir

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