elgerg
April 1, 2022, 9:49pm
1
I have a timer that is set for every 60 seconds but it seems to be fired off every 30 seconds. Any idea what I’m doing wrong?
Raspberry PI 400 using VSCode and simulator
8.1
I’d like the task to be executed when I want it to (every 60 seconds)
lv_timer_create(tsk_Internal_temp, 60000, NULL);
lv_timer_create(tsk_Internal_temp, 60000, NULL);
2022-04-01 22:47:53::: Internal Temp Retrieved: 42.84…
Where are you calling lv_tick_inc and how?
elgerg
April 3, 2022, 4:24pm
3
Hi @embeddedt ,
Like so:
#include "lvgl/lvgl.h"
#include "lv_drivers/display/fbdev.h"
#include "lv_drivers/indev/evdev.h"
#include <unistd.h>
#include <pthread.h>
#include <time.h>
#include <sys/time.h>
#include "App/App.h"
#define DISP_BUF_SIZE (LV_VER_RES_MAX * LV_HOR_RES_MAX)
int main(void)
{
/*LittlevGL init*/
lv_init();
/*Linux frame buffer device init*/
fbdev_init();
/*A small buffer for LittlevGL to draw the screen's content*/
static lv_color_t buf1[DISP_BUF_SIZE];
static lv_color_t buf2[DISP_BUF_SIZE];
/*Initialize a descriptor for the buffer*/
static lv_disp_draw_buf_t disp_buf;
lv_disp_draw_buf_init(&disp_buf, buf1, buf2, DISP_BUF_SIZE);
/*Initialize and register a display driver*/
static lv_disp_drv_t disp_drv;
lv_disp_drv_init(&disp_drv);
disp_drv.draw_buf = &disp_buf;
disp_drv.flush_cb = fbdev_flush;
disp_drv.hor_res = 1024;
disp_drv.ver_res = 600;
lv_disp_drv_register(&disp_drv);
evdev_init();
lv_indev_drv_t indev_drv;
lv_indev_drv_init(&indev_drv);
indev_drv.type = LV_INDEV_TYPE_POINTER;
indev_drv.read_cb = evdev_read;
lv_indev_drv_register(&indev_drv); /*Add a display the LittlevGL sing the frame buffer driver*/
/*Create a Demo*/
//lv_demo_widgets();
lv_loadTabs();
/*Handle LitlevGL tasks (tickless mode)*/
while(1) {
lv_task_handler();
usleep(5000);
}
free(chStatus);
free(hwStatus);
return 0;
}
/*Set in lv_conf.h as `LV_TICK_CUSTOM_SYS_TIME_EXPR`*/
uint32_t custom_tick_get(void)
{
static uint64_t start_ms = 0;
if(start_ms == 0) {
struct timeval tv_start;
gettimeofday(&tv_start, NULL);
start_ms = (tv_start.tv_sec * 1000000 + tv_start.tv_usec) / 1000;
}
struct timeval tv_now;
gettimeofday(&tv_now, NULL);
uint64_t now_ms;
now_ms = (tv_now.tv_sec * 1000000 + tv_now.tv_usec) / 1000;
uint32_t time_ms = now_ms - start_ms;
return time_ms;
}
This (if memory serves correctly) comes from:
Thanks!
elgerg
April 3, 2022, 5:27pm
4
Oh and for the Simulator project:
/**
* @file main
*
*/
/*********************
* INCLUDES
*********************/
#define _DEFAULT_SOURCE /* needed for usleep() */
#include <stdlib.h>
#include <unistd.h>
#define SDL_MAIN_HANDLED /*To fix SDL's "undefined reference to WinMain" issue*/
#include <SDL2/SDL.h>
#include "lvgl/lvgl.h"
#include "lv_drivers/display/monitor.h"
#include "lv_drivers/indev/mouse.h"
#include "lv_drivers/indev/keyboard.h"
#include "lv_drivers/indev/mousewheel.h"
#include "App/App.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void hal_init(void);
static int tick_thread(void *data);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* VARIABLES
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
int main(int argc, char **argv)
{
(void)argc; /*Unused*/
(void)argv; /*Unused*/
/*Initialize LVGL*/
lv_init();
/*Initialize the HAL (display, input devices, tick) for LVGL*/
hal_init();
// lv_example_switch_1();
// lv_example_calendar_1();
// lv_example_btnmatrix_2();
// lv_example_checkbox_1();
// lv_example_colorwheel_1();
// lv_example_chart_6();
// lv_example_table_2();
// lv_example_scroll_2();
// lv_example_textarea_1();
// lv_example_msgbox_1();
// lv_example_dropdown_2();
// lv_example_btn_1();
// lv_example_scroll_1();
// lv_example_tabview_1();
// lv_example_tabview_1();
// lv_example_flex_3();
// lv_example_label_1();
// lv_demo_widgets();
// lv_demo_keypad_encoder();
// lv_demo_benchmark();
// lv_demo_stress();
// lv_demo_music();
lv_loadTabs();
while(1) {
/* Periodically call the lv_task handler.
* It could be done in a timer interrupt or an OS task too.*/
lv_timer_handler();
usleep(5 * 1000);
}
return 0;
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Initialize the Hardware Abstraction Layer (HAL) for the LVGL graphics
* library
*/
static void hal_init(void)
{
/* Use the 'monitor' driver which creates window on PC's monitor to simulate a display*/
monitor_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*/
static lv_disp_draw_buf_t disp_buf1;
static lv_color_t buf1_1[MONITOR_HOR_RES * 100];
static lv_color_t buf1_2[MONITOR_HOR_RES * 100];
lv_disp_draw_buf_init(&disp_buf1, buf1_1, buf1_2, MONITOR_HOR_RES * 100);
/*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 = monitor_flush;
disp_drv.hor_res = MONITOR_HOR_RES;
disp_drv.ver_res = MONITOR_VER_RES;
disp_drv.antialiasing = 1;
lv_disp_t * disp = lv_disp_drv_register(&disp_drv);
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_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*/
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 = mouse_read;
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 = keyboard_read;
lv_indev_t *kb_indev = lv_indev_drv_register(&indev_drv_2);
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 = mousewheel_read;
lv_indev_t * enc_indev = lv_indev_drv_register(&indev_drv_3);
lv_indev_set_group(enc_indev, g);
/*Set a cursor for the mouse*/
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_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*/
}
/**
* A task to measure the elapsed time for LVGL
* @param data unused
* @return never return
*/
static int tick_thread(void *data) {
(void)data;
while(1) {
SDL_Delay(5);
lv_tick_inc(5); /*Tell LittelvGL that 5 milliseconds were elapsed*/
}
return 0;
}
From:
Thanks!
Unless I missed something, both look correct.
For the simulator, you could try reducing the tick delta in tick_thread to something slow like 250ms and then add a printf statement in the loop. Make sure it gets printed 4 times a second. If so, I don’t see how the timer could fire at a different speed, unless I’m missing something very obvious.