SSD1306 orientation

[michox]

I would be thrilled if it would be possible to implement 90 and 270 degree rotations (i.e. Portrait mode) for the SSD1306 driver.

I would love to use LVGL for my project but I would need this capability. I tried to see if I could implement it myself but failed. It should be fairly simple to implement using some conversions and a switch statement at the last place before sending the command to the display.

If somebody could find some time in the near future to help me implement that, I would be very grateful!

[tore-espressif]

SSD1306 does not support portrait orientation, so the rotation must be in software. Will have a look probably this next week

[tore-espressif]

Actually, LVGL v8 has changed handling of display rotation. So we can start working on it after we have support for v8.

[adam2809]

Hi I just found this issue while trying to figure out portrait mode for SSD1306 on esp32 and I just wanted to ask if there are any updates. Please let me know about the progress and if the issue is still unresolved I'd love to help since I need this for a project.

[C47D]

Hi @adam2809, I haven't been able to work on this. AFAIK other users had been able to get rotation working on other monochrome displays by software rotation on the round_px callback.

What version of LVGL are you working on?

[adam2809]

Thanks for the quick response @C47D do you have any examples of the round_px implementations which have this functionality? I am using lvgl 7.11.0 and lvgl_esp32_drivers form commit f3f6ba6. I tried to set up newer varsions of these repos but this is the only version combination that I was able to get working although I read in some threads that in lvgl v8 will help with getting portrait so I am considering an upgrade.

[C47D]

@adam2809 Sorry I don't have an example at hand, I think I saw it being mentioned over the forum. I will take a look over there tomorrow after work. I have an SSD1306 display so I may be able to give it a try later this week.

I tried to set up newer varsions of these repos but this is the only version combination that I was able to get working

Are you using the lv_port_esp32 example project? What is failing when you try to use a newer version of this repo?

[adam2809]

@C47D I have no idea why I didn't just use the versions from lv_port_esp32 but I just tried it and it works perfectly. The solution I tried so far was setting my lv_disp_drv_t like this:
disp_drv.sw_rotate = 1;
disp_drv.rotated = LV_DISP_ROT_90; // or LV_DISP_ROT_270
but this just results in random artifacts that display only on one side of the screen.

[C47D]

Hi, the rotations in the repo were introduced before the "official" rotation support and they don't line up. In the particular case of you driver you have two rotation options in the menuconfig configuration page, landscape and inverted landscape. Both portrait orientations doesn't work.

Working on lining up both rotation approaches has been in my to do list for quite a while, I just haven't had the time to work on it.