Template for LVGL web simulator project with EEZ Studio
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/**
* @file main
*
*/
/*********************
* INCLUDES
*********************/
#include <stdlib.h>
#include <unistd.h>
#define SDL_MAIN_HANDLED /*To fix SDL's "undefined reference to WinMain" issue*/
#include <SDL2/SDL.h>
#include <emscripten.h>
#include "lvgl/lvgl.h"
#include "lv_drivers/sdl/sdl.h"
#include "lv_drivers/indev/mouse.h"
#include "lv_drivers/indev/mousewheel.h"
#include "lv_drivers/indev/keyboard.h"
#include "src/ui/ui.h"
/*********************
* DEFINES
*********************/
/*On OSX SDL needs different handling*/
#if defined(__APPLE__) && defined(TARGET_OS_MAC)
# if __APPLE__ && TARGET_OS_MAC
#define SDL_APPLE
# endif
#endif
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void hal_init(void);
static int tick_thread(void * data);
static void memory_monitor(lv_timer_t * param);
/**********************
* STATIC VARIABLES
**********************/
static lv_disp_t * disp1;
int monitor_hor_res, monitor_ver_res;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
void do_loop(void *arg);
int main(int argc, char ** argv)
{
monitor_hor_res = atoi(argv[1]);
monitor_ver_res = atoi(argv[2]);
printf("Starting with screen resolution of %dx%d px\n", monitor_hor_res, monitor_ver_res);
/*Initialize LittlevGL*/
lv_init();
/*Initialize the HAL (display, input devices, tick) for LittlevGL*/
hal_init();
/*Init*/
ui_init();
emscripten_set_main_loop_arg(do_loop, NULL, -1, true);
}
void do_loop(void *arg)
{
/* Periodically call the lv_task handler.
* It could be done in a timer interrupt or an OS task too.*/
lv_task_handler();
ui_tick();
SDL_Event event;
while(SDL_PollEvent(&event)) {
#if USE_MOUSE != 0
mouse_handler(&event);
#endif
#if USE_KEYBOARD
keyboard_handler(&event);
#endif
#if USE_MOUSEWHEEL != 0
mousewheel_handler(&event);
#endif
}
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Initialize the Hardware Abstraction Layer (HAL) for the Littlev graphics library
*/
static void hal_init(void)
{
/* Use the 'monitor' driver which creates window on PC's monitor to simulate a display*/
sdl_init();
/*Create a display buffer*/
static lv_disp_draw_buf_t disp_buf1;
lv_color_t * buf1_1 = malloc(sizeof(lv_color_t) * monitor_hor_res * monitor_ver_res);
lv_disp_draw_buf_init(&disp_buf1, buf1_1, NULL, monitor_hor_res * monitor_ver_res);
/*Create a display*/
static lv_disp_drv_t disp_drv;
lv_disp_drv_init(&disp_drv); /*Basic initialization*/
disp_drv.draw_buf = &disp_buf1;
disp_drv.flush_cb = sdl_display_flush; /*Used when `LV_VDB_SIZE != 0` in lv_conf.h (buffered drawing)*/
disp_drv.hor_res = monitor_hor_res;
disp_drv.ver_res = monitor_ver_res;
disp1 = lv_disp_drv_register(&disp_drv);
//lv_group_t * g = lv_group_create();
//lv_group_set_default(g);
/* Add the mouse as input device
* Use the 'mouse' driver which reads the PC's mouse*/
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);
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_set_group(kb_indev, g);
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);
/* Optional:
* Create a memory monitor task which prints the memory usage in periodically.*/
lv_timer_create(memory_monitor, 3000, NULL);
}
/**
* Print the memory usage periodically
* @param param
*/
static void memory_monitor(lv_timer_t * param)
{
(void) param; /*Unused*/
}