lvgl | Embedded graphics library to create beautiful UIs

by lvgl C Version: v8.3.7 License: MIT

X-Ray Key Features Code Snippets Community Discussions(7)Vulnerabilities Install Support

kandi X-RAY | lvgl Summary

lvgl is a C library. lvgl has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Powerful and easy-to-use embedded GUI library with many widgets, advanced visual effects (opacity, antialiasing, animations) and low memory requirements (16K RAM, 64K Flash).

Support

Quality

Security

License

Reuse

Support

lvgl has a medium active ecosystem.

It has 12197 star(s) with 2491 fork(s). There are 282 watchers for this library.

It had no major release in the last 12 months.

There are 50 open issues and 2385 have been closed. On average issues are closed in 16 days. There are 9 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of lvgl is v8.3.7

Quality

lvgl has 0 bugs and 0 code smells.

Security

lvgl has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

lvgl code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

lvgl is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

lvgl releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

It has 7528 lines of code, 185 functions and 155 files.

It has high code complexity. Code complexity directly impacts maintainability of the code.

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lvgl Key Features

No Key Features are available at this moment for lvgl.

lvgl Examples and Code Snippets

No Code Snippets are available at this moment for lvgl.

Community Discussions

Trending Discussions on lvgl

LVGL functions not defined - why?

Problem in C with pointers, struct in struct and malloc

Make Makefile to build newly created file

Variable treated unexpectedly in Makefile

Update current Git fork of a project with original project with merge strategy depending on directory

Makefile ignores source file

GitHub action to check out repo as a git submodule

QUESTION

LVGL functions not defined - why?

Asked 2021-Nov-13 at 22:36

I'm implementing a sample application on SeeedStudio's Wio Terminal with LVGL. I followed the LVGL's porting tutorial and came up with the following:

...

ANSWER

Answered 2021-Nov-13 at 22:36

Arduino Studio IDE has a flaw regarding compilation: only files in src subfolder of the sketch gets copied to the tmp folder and compiled. So all non-standard libraries should be placed in src subfolder in sketch folder.

Source https://stackoverflow.com/questions/69958738

QUESTION

Problem in C with pointers, struct in struct and malloc

Asked 2021-Sep-30 at 17:08

I have a problem with memory allocation in C and LVGL. The first part is the definitions.

...

ANSWER

Answered 2021-Sep-30 at 17:08

Here's what is not working

Source https://stackoverflow.com/questions/69394707

QUESTION

Make Makefile to build newly created file

Asked 2021-Apr-27 at 00:07

I have Makefile below that should build all new *.c files I will place in current folder. But this not happens. I have created new file with name mouse_cursor_icon.c and place in the same folder together with main_btn.c. I was expecting make command will build and generate mouse_cursor_icon.o file. But this not happened. How to solve that?

...

ANSWER

Answered 2021-Apr-27 at 00:07

Normal make does not have any (good) way of saying "build all of the .c files in a directory." GNU make has extensions that allow this sort of thing: it defines a wildcard function that can be used to get all the (source) files that match some pattern. For example, you might add to your Makefile:

Source https://stackoverflow.com/questions/67272408

QUESTION

Variable treated unexpectedly in Makefile

Asked 2020-Dec-19 at 12:04

I have Makefile below that treats $(CC) varaible as cc. Variable $(BB) is treated gcc as expected. Why $(CC) is treated as cc and not gcc?

...

ANSWER

Answered 2020-Dec-19 at 12:04

BB ?= gcc
CC ?= gcc

all:
    echo $(CC)
    echo $(BB)

Source https://stackoverflow.com/questions/65362956

QUESTION

Update current Git fork of a project with original project with merge strategy depending on directory

Asked 2020-Nov-07 at 07:25

There is a fork of micropython, which incorporates lvgl (a gui).

Nearly all lvgl-related code is separate from the micropython code beside some few overlapps.
These overlapps are related to certain (sub-)directories.

Using the lvgl-fork as "ours" and the Git repo of micropython as "theirs", I could merge theirs into ours with overwrite (-X) ... and loose the overlapping parts.
Or I could merge without using -X resulting in "thousands" :) of conflicts, which are no real conflicts but updates since the great majority of code of micropython wasn't touched by lvgl.

Since this is a firmware, which is difficult to debug and flashing as such isn't THAT healthy for a flash memory, I don't want to experiment that much... :)

Is there a way to do a kind of a "git merge with forced overwrite except for the following directories, in which I want to get conflicts if there are any" ?

...

ANSWER

Answered 2020-Nov-07 at 07:23

That does not seem trivial to do, but you might consider:

a first merge (-X): you get one commit, but with the overlapping part overriden
a second merge between dedicate branches, each one representing the few subfolders you need to pay attention to during said merge.

The idea regarding the latter point is that you can isolate a folder in its own branch using git substree split

Extract a new, synthetic project history from the history of the subtree.
The new history includes only the commits (including merges) that affected , and each of those commits now has the contents of at the root of the project instead of in a subdirectory.
Thus, the newly created history is suitable for export as a separate git repository.

You can see that approach used in "How do I merge a sub directory in Git?", where you have two branches, but want to merge only the history of dir-1 from branch-a into branch-b.
That is what you want to do in the second step I mention above.

Source https://stackoverflow.com/questions/64724810

QUESTION

Makefile ignores source file

Asked 2020-Oct-12 at 12:22

I have a problem I have previously never encountered in my life.

CONTEXT

I have a C program which I cross compile for an ARM device. I use the LVGL library which is a graphics lib for embedded/light systems.

I have organized my project in a MVC like manner - all the views are in a folder called "screens", which has, like all other folders in the src folder of my project, its own Makefile, called by the main Makefile.

Specifically, the screens folder mostly contains files called "image_x.c", "screen_x.c" - the "image" file being a C file generated by an online converted, putting an image in an array, and the "screen" file being the source code I require to declare a screen, load an image, attach it to this screen and display that screen. This is a structure that functions, as I have used it until now, pretty much copying and pasting files and changing things in them according to my needs.

PROBLEM

For some reason, this time, one file is simply ignored by the makefile, despite being in it AND being in the folder.

I get the following error:

...

ANSWER

Answered 2020-Oct-12 at 12:22

The line appends to a variable called CRSCS, while it should be CSRCS. Two characters got swapped.

Source https://stackoverflow.com/questions/64317715

QUESTION

GitHub action to check out repo as a git submodule

Asked 2020-Sep-10 at 23:36

Background

I have a project which contains a git sub-module, both are hosted on GitHub.
The sub-module sources are built as part of the project, and changes in the sub-module could affect the containing project.

My goal is to make sure the sub-module does not break the containing project.
For that purpose I'm trying to create a GitHub action on the submodule repo that does the following upon push/pull:

Clone the containing project
Check out the submodule with the specific push/PR SHA
Build the project with the submodule

The problem

The standard Checkout v2 action does not support such workflow.
Instead, I'm cloning and checking out the submodule according to $GITHUB_SHA, like this:

...

ANSWER

Answered 2020-Sep-10 at 23:36

I found the answer here:
https://frontside.com/blog/2020-05-26-github-actions-pull_request/#how-does-pull_request-affect-actionscheckout

Apparently, in case of PR, github.sha (or $GITHUB_SHA) represents the SHA of the resulting commit that was created from merging the base to the head, and not the SHA of the base change commit itself.

To obtain it, I needed to fetch refs/pull/*/merge instead of refs/pull/*/head.

Now this run step makes more sense:

Source https://stackoverflow.com/questions/63795736

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install lvgl

This list shows the recommended way of learning the library:.
Check the Online demos to see LVGL in action (3 minutes)
Read the Introduction page of the documentation (5 minutes)
Get familiar with the basics on the Quick overview page (15 minutes)
Set up a Simulator (10 minutes)
Try out some Examples
Port LVGL to a board. See the Porting guide or check the ready to use Projects
Read the Overview page to get a better understanding of the library (2-3 hours)
Check the documentation of the Widgets to see their features and usage
If you have questions go to the Forum
Read the Contributing guide to see how you can help to improve LVGL (15 minutes)