Screen orientation on framebuffer

How-to
1

Description

###How to set screen orientation with framebuffer?
I would like to have a orientation on how can I orientate/rotate my display, what I need to do or rewrite.
If you have any literature to improve my skill, I apreciate.
The picture attached explain my goal.

What MCU/Processor/Board and compiler are you using?

Embedded Linux for point-of-sale hardware, gcc, eclipse, framebuffer

What do you want to achieve?

I want to reproduce this

1
1.PNG1155×757 24.9 KB

What have you tried so far?

  • Used “rotated parameter” that really rotated the display, but it wasnt enough
  • Track if I need to achieve this in the “drawing” code or re-map the graphics created or alter the mode to copy image to framebuffer
  • change fbdev_flush, but didnt get good results

Screenshot and/or video

rotated = 1

lv_conf.h

#define LV_HOR_RES_MAX          (240)
#define LV_VER_RES_MAX          (320)

disp_drv.rotated = 1;

rotated = 0

lv_conf.h

#define LV_HOR_RES_MAX          (240)
#define LV_VER_RES_MAX          (320)

disp_drv.rotated = 0;
2

I asked this question on the old forum but I haven’t been able to find it unfortunately.
You should change the orientation of the frame buffer in your display driver so that lines are drawn across your short axis.
In my case I did not have hardware that supported framebuffer rotation like this so I manually applied the transformation in the flush CB.

3

We are just talking about it here.