Display controller and touchpad driver to can be directly used with LVGL. More...

Detailed Description

Display controller and touchpad driver to can be directly used with LVGL.

Note: This package needs the 32bit version of SDL2

See also: https://github.com/lvgl/lv_drivers

Configuration options

To change the size of the screen SDL_HOR_RES and SDL_VER_RES can be changed via CFLAGS or in lv_drv_conf.h.

For small screen a zoom factor can be applied through SDL_ZOOM, e.g: SDL_ZOOM=2 will apply a x2 zoom to the display.

SDL Requirements

To run lvgl inside a simulator (native), SDL2 is required. Install instructions can be found at https://docs.lvgl.io/latest/en/html/get-started/pc-simulator.html#install-sdl-2, note that the 32bit version is needed.

On debian/ubuntu this could be as simple as installing the libsdl2-dev:i386 package.

Using SDL2 requires more stack so in case you are using it add

CFLAGS += '-DTHREAD_STACKSIZE_MAIN=48*1024'

to your makefile. 48kB is enough for the test, other uses may need more or may need this to be applied to other threads using THREAD_STACKSIZE_DEFAULT

#define	USE_SDL IS_USED(MODULE_LV_DRIVERS_SDL)
	LVGL Drivers SDL2 configuration headers.

#define	SDL_HOR_RES 320
	LVGL SDL2 display horizontal resolution.

#define	SDL_VER_RES 240
	LVGL SDL2 display vertical resolution.

#define	LV_HOR_RES SDL_HOR_RES
	LVGL display horizontal resolution.

#define	LV_VER_RES SDL_VER_RES
	LVGL display vertical resolution.

#define	SDL_ZOOM 1
	Enable Scale window by this factor (useful when simulating small screens)

#define	SDL_DOUBLE_BUFFERED 0
	Used to test true double buffering with only address changing.

#define	SDL_DUAL_DISPLAY 0
	Open two windows to test multi display support.

Macro Definition Documentation

◆ LV_HOR_RES

#define LV_HOR_RES SDL_HOR_RES

LVGL display horizontal resolution.

Definition at line 58 of file lv_drv_conf.h.

◆ LV_VER_RES

#define LV_VER_RES SDL_VER_RES

LVGL display vertical resolution.

Definition at line 62 of file lv_drv_conf.h.

◆ SDL_DOUBLE_BUFFERED

#define SDL_DOUBLE_BUFFERED 0

Used to test true double buffering with only address changing.

Use 2 draw buffers, both with SDL_HOR_RES x SDL_VER_RES size

Definition at line 73 of file lv_drv_conf.h.

◆ SDL_DUAL_DISPLAY

#define SDL_DUAL_DISPLAY 0

Open two windows to test multi display support.

Definition at line 77 of file lv_drv_conf.h.

◆ SDL_HOR_RES

#define SDL_HOR_RES 320

LVGL SDL2 display horizontal resolution.

Definition at line 47 of file lv_drv_conf.h.

◆ SDL_VER_RES

#define SDL_VER_RES 240

LVGL SDL2 display vertical resolution.

Definition at line 53 of file lv_drv_conf.h.

◆ SDL_ZOOM

#define SDL_ZOOM 1

Enable Scale window by this factor (useful when simulating small screens)

Definition at line 67 of file lv_drv_conf.h.

◆ USE_SDL

#define USE_SDL IS_USED(MODULE_LV_DRIVERS_SDL)

LVGL Drivers SDL2 configuration headers.

Note: Based on upstream lv_drv_conf_template.h.

Author: Francisco Molina franc.nosp@m.ois-.nosp@m.xavie.nosp@m.r.mo.nosp@m.lina@.nosp@m.inri.nosp@m.a.fr

Internal flag to enable LVGL SDL2 based drivers for display, mouse, mousewheel and keyboard

Definition at line 42 of file lv_drv_conf.h.