Porting lvgl to a monochrome display

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1

Hello everyone,
I am trying to port lvgl to a 240x128 resistive touch display. I already have a simpler graphic library and drivers running on my device so the task should not be particularly hard.
I have been taking this tutorial as reference: https://blog.littlevgl.com/2019-05-06/oled
Here however I find some discrepancies between the official API and the code snippets. Specifically it seems to reference the special case for a monochrome display that I can’t find in the source code of the library.

The code I’m referring to is the following:

    monitor_init();
    lv_disp_drv_t disp_drv;
    lv_disp_drv_init(&disp_drv);            /*Basic initialization*/
    disp_drv.disp_flush = monitor_flush;
    disp_drv.vdb_wr = lv_vdb_wr_gray;  
    lv_disp_drv_register(&disp_drv);

Here it uses the fields disp_flush and vdb_wr of the lv_disp_driver_t structure: in the official API however the former just doesn’t exist and the latter is called flush_cb instead…
I believe the functionalities used should have been implemented 1 year ago in the wake of this Github issue https://github.com/littlevgl/lvgl/issues/300, which mention version 5.2 ; the latest lvgl version is 6.0, so it should be there?

I’m a little confused, can someone clarify this for me?

2

The functionality still exists but the blog post was written against the older API, hence the reason you are finding differences.

3

Thank you. I was confused because the post itself is very recent (May 2019).

4

We released v6.0 on 1 June.
If you follow that post and see the issues could you update it? Just edit the file on GitHub.

5

Do you mean July? :wink:

6

Yes, sorry :slight_smile:

7

Once I’ve reached reasonable results I most likely will; I was able to correctly edit the framebuffer today, tomorrow I’ll take a look at flushing and input management.

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8

@kisvegabor I’ve created a pull request to update the blog post with the outdated API

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9

Awesome! I’ll check it!