Zybo-Z7-10 Petalinux /dev/fb0 frame buffer fbdev about lv_port_linux

[embeddedt]

What is the problem?

[martin-scott-bluefruit]

Hi, the image is distorted - it is double width, looks monochrome, and has vertical striations. The text is readable. I am wondering if there is a format mismatch - i am not sure what the rgba definition means and how it relates to the littlevgl formats

[embeddedt]

It's likely that lv_drivers/display/fbdev.c needs some modifications to accomodate your framebuffer's color format.

[martin-scott-bluefruit]

ok, i'll do some more research, thanks

[martin-scott-bluefruit]

Problem seems to be that memcpy (in fbdev_flush) cannot be used to copy to this 24bpp framebuffer because the color_p format is 32 bits. Therefore memcpy should be substituted with a version that skips every 4th byte, or support for a different color_p format is required. I tried changing petalinux /dev/fb0 to 32bpp but it does not seem to stick.

[embeddedt]

memcpy should be substituted with a version that skips every 4th byte

This is probably the simplest solution.