mpotapov/LVGL-simulation-example
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added x11 support for lowlevel display support

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the x11 driver has been added to the lv_library repository.
Now both variants (SDL/X11) can be selected in the Makefile. Additional fixes here have been applied.

select X11 by default
This commit is contained in:
Gregor Copoix 2023-11-06 14:08:16 +01:00
parent 465cbdd3fe
commit 7a83e60683
12 changed files with 244 additions and 162 deletions
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3
.gitmodules vendored
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@ -1,3 +1,6 @@
[submodule "lv_drivers"]
path = lv_drivers
url = https://github.com/gcopoix/lv_drivers.git
[submodule "lvgl"] [submodule "lvgl"]
path = lvgl path = lvgl
url = https://github.com/lvgl/lvgl.git url = https://github.com/lvgl/lvgl.git

23
.vscode/c_cpp_properties.json vendored
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@ -1,23 +0,0 @@
{
"configurations": [
{
"name": "Linux",
"includePath": [
"${workspaceFolder}/**"
],
"defines": [],
"intelliSenseMode": "gcc-x64",
"browse": {
"path": [
"${workspaceFolder}/**"
],
"limitSymbolsToIncludedHeaders": true,
"databaseFilename": ""
},
"compilerPath": "/usr/bin/gcc",
"cStandard": "c11",
"cppStandard": "c++17"
}
],
"version": 4
}

3
.vscode/extensions.json vendored
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@ -1,3 +0,0 @@
{
"recommendations": ["ms-vscode.cpptools"]
}

25
.vscode/launch.json vendored
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@ -1,25 +0,0 @@
{
"version": "0.2.0",
"configurations": [
{
"name": "g++ build and debug active file",
"type": "cppdbg",
"request": "launch",
"program": "${workspaceFolder}/build/bin/demo",
"args": [],
"stopAtEntry": false,
"cwd": "${workspaceFolder}",
"environment": [],
"externalConsole": false,
"MIMode": "gdb",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
],
"preLaunchTask": "Build"
}
]
}

38
.vscode/tasks.json vendored
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@ -1,38 +0,0 @@
{
"version": "2.0.0",
"tasks": [
{
"type": "shell",
"label": "Build",
"command": "make",
"options": {
"cwd": "${workspaceFolder}"
},
"presentation": {
"echo": true,
"reveal": "always",
"focus": false,
"panel": "shared"
},
"problemMatcher": {
"owner": "cpp",
"fileLocation": [
"relative",
"${workspaceFolder}"
],
"pattern": {
"regexp": "^(.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
"file": 1,
"line": 2,
"column": 3,
"severity": 4,
"message": 5
}
},
"group": {
"kind": "build",
"isDefault": true
},
}
]
}

26
Makefile
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@ -3,7 +3,12 @@
# WARNING: relies on invocation setting current working directory to Makefile location # WARNING: relies on invocation setting current working directory to Makefile location
# This is done in .vscode/task.json # This is done in .vscode/task.json
# #
PROJECT ?= lvgl-sdl
# select underlaying LCGL display driver (SDL2 || X11)
LV_DRIVER := X11
#LV_DRIVER := SDL2
PROJECT ?= lvgl-demo
MAKEFLAGS := -j $(shell nproc) MAKEFLAGS := -j $(shell nproc)
SRC_EXT := c SRC_EXT := c
OBJ_EXT := o OBJ_EXT := o
@ -25,12 +30,19 @@ WARNINGS := -Wall -Wextra \
CFLAGS := -O0 -g $(WARNINGS) CFLAGS := -O0 -g $(WARNINGS)
# Add simulator define to allow modification of source # simulator library define
DEFINES := -D SIMULATOR=1 -D LV_BUILD_TEST=0 ifeq "$(LV_DRIVER)" "SDL2"
LV_DRIVER_USE := USE_SDL
else
LV_DRIVER_USE := USE_$(LV_DRIVER)
endif
# Add simulator defines to allow modification of source
DEFINES := -D SIMULATOR=1 -D LV_BUILD_TEST=0 -D $(LV_DRIVER_USE)
# Include simulator inc folder first so lv_conf.h from custom UI can be used instead # Include simulator inc folder first so lv_conf.h from custom UI can be used instead
INC := -I./ui/simulator/inc/ -I./ -I./lvgl/ #-I/usr/include/freetype2 -L/usr/local/lib INC := -I./ui/simulator/inc/ -I./ -I./lvgl/ #-I/usr/include/freetype2 -L/usr/local/lib
LDLIBS := -lSDL2 -lm #-lfreetype -lavformat -lavcodec -lavutil -lswscale -lm -lz -lpthread LDLIBS := -l$(LV_DRIVER) -lpthread -lm #-lfreetype -lavformat -lavcodec -lavutil -lswscale -lm -lz
BIN := $(BIN_DIR)/demo BIN := $(BIN_DIR)/demo
COMPILE = $(CC) $(CFLAGS) $(INC) $(DEFINES) COMPILE = $(CC) $(CFLAGS) $(INC) $(DEFINES)
@ -39,14 +51,14 @@ COMPILE = $(CC) $(CFLAGS) $(INC) $(DEFINES)
SRCS := $(shell find $(SRC_DIR) -type f -name '*.c' -not -path '*/\.*') SRCS := $(shell find $(SRC_DIR) -type f -name '*.c' -not -path '*/\.*')
OBJECTS := $(patsubst $(SRC_DIR)%,$(BUILD_DIR)/%,$(SRCS:.$(SRC_EXT)=.$(OBJ_EXT))) OBJECTS := $(patsubst $(SRC_DIR)%,$(BUILD_DIR)/%,$(SRCS:.$(SRC_EXT)=.$(OBJ_EXT)))
all: default all: $(BIN)
$(BUILD_DIR)/%.$(OBJ_EXT): $(SRC_DIR)/%.$(SRC_EXT) $(BUILD_DIR)/%.$(OBJ_EXT): $(SRC_DIR)/%.$(SRC_EXT) lv_demo_conf.h lv_conf.h Makefile
@echo 'Building project file: $<' @echo 'Building project file: $<'
@mkdir -p $(dir $@) @mkdir -p $(dir $@)
@$(COMPILE) -c -o "$@" "$<" @$(COMPILE) -c -o "$@" "$<"
default: $(OBJECTS) $(BIN): $(OBJECTS)
@mkdir -p $(BIN_DIR) @mkdir -p $(BIN_DIR)
$(CC) -o $(BIN) $(OBJECTS) $(LDFLAGS) ${LDLIBS} $(CC) -o $(BIN) $(OBJECTS) $(LDFLAGS) ${LDLIBS}

31
README.md
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@ -9,11 +9,12 @@ Using a PC simulator instead of an embedded hardware has several advantages:
* **Developer friendly** because much easier and faster to debug on PC * **Developer friendly** because much easier and faster to debug on PC
## Requirements ## Requirements
This project is configured for VSCode and only tested on Linux, although this may work on OSx or WSL. It requires a working version of GCC, GDB and make in your path. This project is configured for [VSCode](https://code.visualstudio.com) and only tested on Linux, although this may work on OSx or WSL. It requires a working version of GCC, GDB and make in your path.
To allow debugging inside VSCode you will also require a GDB [extension](https://marketplace.visualstudio.com/items?itemName=webfreak.debug) or other suitable debugger. To allow debugging inside VSCode you will also require a GDB [extension](https://marketplace.visualstudio.com/items?itemName=webfreak.debug) or other suitable debugger. All the requirements have been pre-configured in the [.workspace](simulator.code-workspace) file (simply open the project by doubleclick on this file).
* **SDL** a low level driver library to use graphics, handle mouse, keyboard etc. The project can use **SDL** or **X11** as LVGL display driver for lowlevel graphics/mouse/keyboard support. This can be defined in the [Makefile](Makefile#L8).
Please make sure the selected library is installed in the system (check [Install graphics driver](#install-graphics-driver)).
## Usage ## Usage
@ -25,7 +26,11 @@ Clone the PC project and the related sub modules:
git clone --recursive https://github.com/lvgl/lv_port_pc_vscode git clone --recursive https://github.com/lvgl/lv_port_pc_vscode
``` ```
### Install SDL ### Install graphics driver
The project can use **SDL** or **X11** as LVGL display driver. This can be selected in the [Makefile](Makefile#L8).
Please make sure the used library is installed in the system:
#### Install SDL
You can download SDL from https://www.libsdl.org/ You can download SDL from https://www.libsdl.org/
On on Linux you can install it via terminal: On on Linux you can install it via terminal:
@ -33,6 +38,12 @@ On on Linux you can install it via terminal:
sudo apt-get update && sudo apt-get install -y build-essential libsdl2-dev sudo apt-get update && sudo apt-get install -y build-essential libsdl2-dev
``` ```
#### Install X11
On on Linux you can install it via terminal:
```bash
sudo apt-get update && sudo apt-get install -y libx11-dev
```
### Optional library ### Optional library
There are also FreeType and FFmpeg support. You can install FreeType support with: There are also FreeType and FFmpeg support. You can install FreeType support with:
```bash ```bash
@ -55,10 +66,16 @@ make
sudo make install sudo make install
``` ```
And then remove all the comments in the `Makefile` on `INC` and `LDLIBS` lines. They should be: And then remove all the comments in the `Makefile` on `INC` and `LDLIBS` lines. \
They should be for **SDL**:
```Makefile ```Makefile
INC := -I./ui/simulator/inc/ -I./ -I./lvgl/ -I/usr/include/freetype2 -L/usr/local/lib INC := -I./ui/simulator/inc/ -I./ -I./lvgl/ -I/usr/include/freetype2 -L/usr/local/lib
LDLIBS := -lSDL2 -lm -lfreetype -lavformat -lavcodec -lavutil -lswscale -lm -lz -lpthread LDLIBS := -lSDL2 -lm -lfreetype -lavformat -lavcodec -lavutil -lswscale -lm -lz -lpthread
```
They should be for **X11**:
```Makefile
INC := -I./ui/simulator/inc/ -I./ -I./lvgl/ -I/usr/include/freetype2 -L/usr/local/lib
LDLIBS := -lX11 -lm -lfreetype -lavformat -lavcodec -lavutil -lswscale -lm -lz -lpthread
``` ```
### Setup ### Setup

6
lv_demo_conf.h
View File

@ -12,6 +12,11 @@
#ifndef LV_EX_CONF_H #ifndef LV_EX_CONF_H
#define LV_EX_CONF_H #define LV_EX_CONF_H
/*====================
SIMULATION SETTINGS
*====================*/
#define DISP_HOR_RES 800
#define DISP_VER_RES 600
/******************* /*******************
* GENERAL SETTING * GENERAL SETTING
@ -53,4 +58,3 @@
#endif /*LV_EX_CONF_H*/ #endif /*LV_EX_CONF_H*/
#endif /*End of "Content enable"*/ #endif /*End of "Content enable"*/

1
lv_drivers Submodule

@ -0,0 +1 @@
Subproject commit 60887240447d061d0d84c95f0ce8dd810b706456

30
lv_drv_conf.h
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@ -1,6 +1,6 @@
/** /**
* @file lv_drv_conf.h * @file lv_drv_conf.h
* Configuration file for v8.3.0 * Configuration file for v9.0.0-dev
*/ */
/* /*
@ -86,7 +86,7 @@
/* SDL based drivers for display, mouse, mousewheel and keyboard*/ /* SDL based drivers for display, mouse, mousewheel and keyboard*/
#ifndef USE_SDL #ifndef USE_SDL
# define USE_SDL 1 # define USE_SDL 0
#endif #endif
/* Hardware accelerated SDL driver */ /* Hardware accelerated SDL driver */
@ -113,6 +113,9 @@
/*Open two windows to test multi display support*/ /*Open two windows to test multi display support*/
# define SDL_DUAL_DISPLAY 0 # define SDL_DUAL_DISPLAY 0
/* Window Title */
# define SDL_WINDOW_TITLE "TFT Simulator"
#endif #endif
/*------------------- /*-------------------
@ -195,6 +198,23 @@
# endif # endif
#endif #endif
/*----------------------------------------
* X11 drivers (monitor, mouse, keyboard)
*---------------------------------------*/
#ifndef USE_X11
# define USE_X11 0
#endif
#if USE_X11
/* Simulated screen resolution */
#ifndef DISP_HOR_RES
#define DISP_HOR_RES 480
#endif
#ifndef DISP_VER_RES
#define DISP_VER_RES 320
#endif
#endif // USE_X11
/*---------------- /*----------------
* SSD1963 * SSD1963
*--------------*/ *--------------*/
@ -323,8 +343,7 @@
#endif #endif
#if USE_FBDEV #if USE_FBDEV
# define FBDEV_PATH "/dev/fb0" # define FBDEV_PATH "/dev/fb0"
# define FBDEV_DISPLAY_POWER_ON 1 /* 1 to force display power during initialization */
#endif #endif
/*----------------------------------------- /*-----------------------------------------
@ -335,8 +354,7 @@
#endif #endif
#if USE_BSD_FBDEV #if USE_BSD_FBDEV
# define FBDEV_PATH "/dev/fb0" # define FBDEV_PATH "/dev/fb0"
# define FBDEV_DISPLAY_POWER_ON 1 /* 1 to force display power during initialization */
#endif #endif
/*----------------------------------------- /*-----------------------------------------

143
main/src/main.c
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@ -10,12 +10,18 @@
#define _DEFAULT_SOURCE /* needed for usleep() */ #define _DEFAULT_SOURCE /* needed for usleep() */
#include <stdlib.h> #include <stdlib.h>
#include <unistd.h> #include <unistd.h>
#define SDL_MAIN_HANDLED /*To fix SDL's "undefined reference to WinMain" issue*/ #include <pthread.h>
#include <SDL2/SDL.h> #include "lv_drv_conf.h"
#include "lvgl/lvgl.h" #include "lvgl/lvgl.h"
#include "lvgl/examples/lv_examples.h" #include "lvgl/examples/lv_examples.h"
#include "lvgl/demos/lv_demos.h" #include "lvgl/demos/lv_demos.h"
#include "lv_drivers/sdl/sdl.h" #if USE_SDL
#define SDL_MAIN_HANDLED /*To fix SDL's "undefined reference to WinMain" issue*/
#include <SDL2/SDL.h>
#include "lv_drivers/sdl/sdl.h"
#elif USE_X11
#include "lv_drivers/x11/x11.h"
#endif
// #include "lv_drivers/display/monitor.h" // #include "lv_drivers/display/monitor.h"
// #include "lv_drivers/indev/mouse.h" // #include "lv_drivers/indev/mouse.h"
// #include "lv_drivers/indev/keyboard.h" // #include "lv_drivers/indev/keyboard.h"
@ -33,11 +39,14 @@
* STATIC PROTOTYPES * STATIC PROTOTYPES
**********************/ **********************/
static void hal_init(void); static void hal_init(void);
static int tick_thread(void *data); static void hal_deinit(void);
static void* tick_thread(void *data);
/********************** /**********************
* STATIC VARIABLES * STATIC VARIABLES
**********************/ **********************/
static pthread_t thr_tick; /* thread */
static bool end_tick = false; /* flag to terminate thread */
/********************** /**********************
* MACROS * MACROS
@ -197,6 +206,7 @@ int main(int argc, char **argv)
usleep(5 * 1000); usleep(5 * 1000);
} }
hal_deinit();
return 0; return 0;
} }
@ -210,12 +220,29 @@ int main(int argc, char **argv)
*/ */
static void hal_init(void) static void hal_init(void)
{ {
/* mouse input device */
static lv_indev_drv_t indev_drv_1;
lv_indev_drv_init(&indev_drv_1);
indev_drv_1.type = LV_INDEV_TYPE_POINTER;
/* keyboard input device */
static lv_indev_drv_t indev_drv_2;
lv_indev_drv_init(&indev_drv_2);
indev_drv_2.type = LV_INDEV_TYPE_KEYPAD;
/* mouse scroll wheel input device */
static lv_indev_drv_t indev_drv_3;
lv_indev_drv_init(&indev_drv_3);
indev_drv_3.type = LV_INDEV_TYPE_ENCODER;
lv_group_t *g = lv_group_create();
lv_group_set_default(g);
lv_disp_t *disp = NULL;
#if USE_SDL
/* Use the 'monitor' driver which creates window on PC's monitor to simulate a display*/ /* Use the 'monitor' driver which creates window on PC's monitor to simulate a display*/
sdl_init(); sdl_init();
/* Tick init.
* You have to call 'lv_tick_inc()' in periodically to inform LittelvGL about
* how much time were elapsed Create an SDL thread to do this*/
SDL_CreateThread(tick_thread, "tick", NULL);
/*Create a display buffer*/ /*Create a display buffer*/
static lv_disp_draw_buf_t disp_buf1; static lv_disp_draw_buf_t disp_buf1;
@ -232,46 +259,78 @@ static void hal_init(void)
disp_drv.ver_res = MONITOR_VER_RES; disp_drv.ver_res = MONITOR_VER_RES;
disp_drv.antialiasing = 1; disp_drv.antialiasing = 1;
lv_disp_t * disp = lv_disp_drv_register(&disp_drv); disp = lv_disp_drv_register(&disp_drv);
/* Add the input device driver */
// mouse_init();
indev_drv_1.read_cb = sdl_mouse_read;
// keyboard_init();
indev_drv_2.read_cb = sdl_keyboard_read;
// mousewheel_init();
indev_drv_3.read_cb = sdl_mousewheel_read;
#elif USE_X11
lv_x11_init("LVGL Simulator Demo", DISP_HOR_RES, DISP_VER_RES);
/*Create a display buffer*/
static lv_disp_draw_buf_t disp_buf1;
static lv_color_t buf1_1[DISP_HOR_RES * 100];
static lv_color_t buf1_2[DISP_HOR_RES * 100];
lv_disp_draw_buf_init(&disp_buf1, buf1_1, buf1_2, DISP_HOR_RES * 100);
/*Create a display*/
static lv_disp_drv_t disp_drv;
lv_disp_drv_init(&disp_drv);
disp_drv.draw_buf = &disp_buf1;
disp_drv.flush_cb = lv_x11_flush;
disp_drv.hor_res = DISP_HOR_RES;
disp_drv.ver_res = DISP_VER_RES;
disp_drv.antialiasing = 1;
disp = lv_disp_drv_register(&disp_drv);
/* Add the input device driver */
indev_drv_1.read_cb = lv_x11_get_pointer;
indev_drv_2.read_cb = lv_x11_get_keyboard;
indev_drv_3.read_cb = lv_x11_get_mousewheel;
#endif
/* Set diplay theme */
lv_theme_t * th = lv_theme_default_init(disp, lv_palette_main(LV_PALETTE_BLUE), lv_palette_main(LV_PALETTE_RED), LV_THEME_DEFAULT_DARK, LV_FONT_DEFAULT); lv_theme_t * th = lv_theme_default_init(disp, lv_palette_main(LV_PALETTE_BLUE), lv_palette_main(LV_PALETTE_RED), LV_THEME_DEFAULT_DARK, LV_FONT_DEFAULT);
lv_disp_set_theme(disp, th); lv_disp_set_theme(disp, th);
lv_group_t * g = lv_group_create(); /* Tick init */
lv_group_set_default(g); end_tick = false;
pthread_create(&thr_tick, NULL, tick_thread, NULL);
/* Add the mouse as input device /* register input devices */
* Use the 'mouse' driver which reads the PC's mouse*/
// mouse_init();
static lv_indev_drv_t indev_drv_1;
lv_indev_drv_init(&indev_drv_1); /*Basic initialization*/
indev_drv_1.type = LV_INDEV_TYPE_POINTER;
/*This function will be called periodically (by the library) to get the mouse position and state*/
indev_drv_1.read_cb = sdl_mouse_read;
lv_indev_t *mouse_indev = lv_indev_drv_register(&indev_drv_1); lv_indev_t *mouse_indev = lv_indev_drv_register(&indev_drv_1);
// keyboard_init();
static lv_indev_drv_t indev_drv_2;
lv_indev_drv_init(&indev_drv_2); /*Basic initialization*/
indev_drv_2.type = LV_INDEV_TYPE_KEYPAD;
indev_drv_2.read_cb = sdl_keyboard_read;
lv_indev_t *kb_indev = lv_indev_drv_register(&indev_drv_2); lv_indev_t *kb_indev = lv_indev_drv_register(&indev_drv_2);
lv_indev_t *enc_indev = lv_indev_drv_register(&indev_drv_3);
lv_indev_set_group(kb_indev, g); lv_indev_set_group(kb_indev, g);
// mousewheel_init();
static lv_indev_drv_t indev_drv_3;
lv_indev_drv_init(&indev_drv_3); /*Basic initialization*/
indev_drv_3.type = LV_INDEV_TYPE_ENCODER;
indev_drv_3.read_cb = sdl_mousewheel_read;
lv_indev_t * enc_indev = lv_indev_drv_register(&indev_drv_3);
lv_indev_set_group(enc_indev, g); lv_indev_set_group(enc_indev, g);
/*Set a cursor for the mouse*/ /* Set a cursor for the mouse */
LV_IMG_DECLARE(mouse_cursor_icon); /*Declare the image file.*/ LV_IMG_DECLARE(mouse_cursor_icon); /*Declare the image file.*/
lv_obj_t * cursor_obj = lv_img_create(lv_scr_act()); /*Create an image object for the cursor */ lv_obj_t * cursor_obj = lv_img_create(lv_scr_act()); /*Create an image object for the cursor*/
lv_img_set_src(cursor_obj, &mouse_cursor_icon); /*Set the image source*/ lv_img_set_src(cursor_obj, &mouse_cursor_icon); /*Set the image source*/
lv_indev_set_cursor(mouse_indev, cursor_obj); /*Connect the image object to the driver*/ lv_indev_set_cursor(mouse_indev, cursor_obj); /*Connect the image object to the driver*/
}
/**
* Releases the Hardware Abstraction Layer (HAL) for the LVGL graphics library
*/
static void hal_deinit(void)
{
end_tick = true;
pthread_join(thr_tick, NULL);
#if USE_SDL
// nop
#elif USE_X11
lv_x11_deinit();
#endif
} }
/** /**
@ -279,13 +338,13 @@ static void hal_init(void)
* @param data unused * @param data unused
* @return never return * @return never return
*/ */
static int tick_thread(void *data) { static void* tick_thread(void *data) {
(void)data; (void)data;
while(1) { while(!end_tick) {
SDL_Delay(5); usleep(5000);
lv_tick_inc(5); /*Tell LittelvGL that 5 milliseconds were elapsed*/ lv_tick_inc(5); /*Tell LittelvGL that 5 milliseconds were elapsed*/
} }
return 0; return NULL;
} }

77
simulator.code-workspace
View File

@ -1,18 +1,75 @@
{ {
// https://code.visualstudio.com/docs/editor/workspaces
// https://code.visualstudio.com/docs/editor/multi-root-workspaces
// https://code.visualstudio.com/docs/editor/variables-reference
"folders": [ "folders": [
{ {
"path": "./" "path": "."
} },
], ],
// extensions.json section
"extensions": {
"recommendations": [
"ms-vscode.cpptools", // common C/C++ support
"ms-vscode.cpptools-themes", // general C/C++ theme
],
"unwantedRecommendations": [
]
},
// settings.json section
"settings": { "settings": {
"files.trimTrailingWhitespace": true,
"files.insertFinalNewline": true,
"files.trimFinalNewlines": true,
"cmake.configureOnOpen": false,
"files.associations": { "files.associations": {
"cstdio": "cpp", "lv_demos.h": "c",
"cstdarg": "cpp" "lvgl.h": "c",
"lv_drv_conf.h": "c",
"stdlib.h": "c"
}, },
"search.exclude": { },
"**/.*": true, // tasks.json section
"build": true "tasks": {
}, "version": "2.0.0",
"search.useIgnoreFiles": false "tasks": [
} {
"label": "Build",
"command": "make",
"group": {
"kind": "build",
"isDefault": true
},
"problemMatcher": {
"owner": "cpp",
"fileLocation": ["relative", "${workspaceFolder}"],
"pattern": {
"regexp": "^(.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
"file": 1,
"line": 2,
"column": 3,
"severity": 4,
"message": 5
}
}
},
],
},
// launch.json section
"launch": {
"version": "0.2.0",
"configurations": [
{
"name": "Debug LVGL demo with gdb",
"type": "cppdbg",
"request": "launch",
"program": "${workspaceFolder}/build/bin/demo",
"args": [],
"cwd": "${fileDirname}",
"preLaunchTask": "Build",
"stopAtEntry": false,
},
],
},
} }