Jan Kamidra / Mbed OS DISCO-F746NG_MbedOs_LvGL_example

Example of using the LVGL (8.3.4) with the MbedOS (6.16 - bare metal) on the Disco-F746NG board

Dependencies:   BSP_DISCO_F746NG

main.cpp@6:778736ecceb0, 15 months ago (annotated)

Committer:
JohnnyK
Date:
Sat Feb 04 21:01:46 2023 +0000
Revision:
6:778736ecceb0
Parent:
5:071136c3eefa 
Update MbedOS to 6.16, update LVGL to 8.3.4 and update Notebook URL

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JohnnyK 5:071136c3eefa 1 /**
JohnnyK 6:778736ecceb0 2 * Notebook page https://os.mbed.com/users/JohnnyK/notebook/how-start-with-the-LVGL/
JohnnyK 5:071136c3eefa 3 */
JohnnyK 5:071136c3eefa 4
JohnnyK 0:10c4b83c458d 5 #include "mbed.h"
JohnnyK 6:778736ecceb0 6 #include "lvgl.h"
JohnnyK 6:778736ecceb0 7 #include "demos/lv_demos.h" /*Comment/uncomment will switch between LVGL demos and Hello word example*/
JohnnyK 3:4f5dc253eb7b 8 #include "hal_stm_lvgl/tft/tft.h"
JohnnyK 3:4f5dc253eb7b 9 #include "hal_stm_lvgl/touchpad/touchpad.h"
JohnnyK 0:10c4b83c458d 10
JohnnyK 3:4f5dc253eb7b 11 #define LVGL_TICK 10 //Time tick value for lvgl in ms (1-10msa)
JohnnyK 3:4f5dc253eb7b 12 #define TICKER_TIME 10ms //modified to miliseconds
JohnnyK 0:10c4b83c458d 13
JohnnyK 3:4f5dc253eb7b 14 Ticker ticker; //Ticker for lvgl
JohnnyK 3:4f5dc253eb7b 15
JohnnyK 5:071136c3eefa 16 /*
JohnnyK 5:071136c3eefa 17 * Callback function for lvgl timing.
JohnnyK 5:071136c3eefa 18 * Call lv_tick_inc(x) every x milliseconds in a Timer or Task (x should be between 1 and 10).
JohnnyK 5:071136c3eefa 19 * It is required for the internal timing of LittlevGL.
JohnnyK 5:071136c3eefa 20 */
JohnnyK 0:10c4b83c458d 21 void lv_ticker_func(){
JohnnyK 0:10c4b83c458d 22 lv_tick_inc(LVGL_TICK);
JohnnyK 0:10c4b83c458d 23 }
JohnnyK 0:10c4b83c458d 24
JohnnyK 6:778736ecceb0 25 #ifndef LV_DEMOS_H
JohnnyK 5:071136c3eefa 26 static void event_handler(lv_event_t* event)
JohnnyK 3:4f5dc253eb7b 27 {
JohnnyK 5:071136c3eefa 28 lv_event_code_t code = lv_event_get_code(event);
JohnnyK 5:071136c3eefa 29 if(code == LV_EVENT_CLICKED) {
JohnnyK 3:4f5dc253eb7b 30 printf("Clicked\n");
JohnnyK 3:4f5dc253eb7b 31 }
JohnnyK 5:071136c3eefa 32 else if(code == LV_EVENT_VALUE_CHANGED) {
JohnnyK 3:4f5dc253eb7b 33 printf("Toggled\n");
JohnnyK 0:10c4b83c458d 34 }
JohnnyK 1:627f26953c53 35 }
JohnnyK 3:4f5dc253eb7b 36 #endif
JohnnyK 3:4f5dc253eb7b 37 // main() runs in its own thread in the OS
JohnnyK 0:10c4b83c458d 38 int main()
JohnnyK 0:10c4b83c458d 39 {
JohnnyK 3:4f5dc253eb7b 40 printf("LVGL-");
JohnnyK 3:4f5dc253eb7b 41 lv_init(); //Initialize the LVGL
JohnnyK 3:4f5dc253eb7b 42 tft_init(); //Initialize diplay
JohnnyK 3:4f5dc253eb7b 43 touchpad_init(); //Initialize touchpad
JohnnyK 3:4f5dc253eb7b 44 ticker.attach(callback(&lv_ticker_func),TICKER_TIME); //Attach callback to ticker
JohnnyK 3:4f5dc253eb7b 45
JohnnyK 6:778736ecceb0 46 #ifdef LV_DEMOS_H
JohnnyK 3:4f5dc253eb7b 47 printf("Demo\n");
JohnnyK 3:4f5dc253eb7b 48 lv_demo_widgets();
JohnnyK 3:4f5dc253eb7b 49 #else
JohnnyK 3:4f5dc253eb7b 50 printf("Hello world\n");
JohnnyK 5:071136c3eefa 51 lv_obj_t * label1 = lv_label_create(lv_scr_act());
JohnnyK 5:071136c3eefa 52 lv_label_set_long_mode(label1, LV_LABEL_LONG_WRAP); /*Break the long lines*/
JohnnyK 3:4f5dc253eb7b 53 lv_label_set_recolor(label1, true); /*Enable re-coloring by commands in the text*/
JohnnyK 3:4f5dc253eb7b 54 lv_label_set_text(label1, "#0000ff Hello# #ff00ff world# #ff0000 - the LVGL and MbedOS#");
JohnnyK 3:4f5dc253eb7b 55 lv_obj_set_width(label1, 150);
JohnnyK 5:071136c3eefa 56 lv_obj_align(label1, LV_ALIGN_TOP_MID, 0, 20);
JohnnyK 3:4f5dc253eb7b 57
JohnnyK 5:071136c3eefa 58 lv_obj_t * label2 = lv_label_create(lv_scr_act());
JohnnyK 5:071136c3eefa 59 lv_label_set_long_mode(label2, LV_LABEL_LONG_SCROLL_CIRCULAR); /*Circular scroll*/
JohnnyK 3:4f5dc253eb7b 60 lv_obj_set_width(label2, 150);
JohnnyK 3:4f5dc253eb7b 61 lv_label_set_text(label2, "It is a circularly scrolling text. ");
JohnnyK 5:071136c3eefa 62 lv_obj_align(label2, LV_ALIGN_BOTTOM_MID, 0, 0);
JohnnyK 0:10c4b83c458d 63
JohnnyK 0:10c4b83c458d 64 lv_obj_t * label;
JohnnyK 5:071136c3eefa 65 lv_obj_t * btn1 = lv_btn_create(lv_scr_act());
JohnnyK 5:071136c3eefa 66 lv_obj_add_event_cb(btn1, event_handler, LV_EVENT_ALL, NULL);
JohnnyK 5:071136c3eefa 67 lv_obj_align(btn1, LV_ALIGN_CENTER, 0, -25);
JohnnyK 5:071136c3eefa 68 label = lv_label_create(btn1);
JohnnyK 0:10c4b83c458d 69 lv_label_set_text(label, "Button");
JohnnyK 5:071136c3eefa 70 lv_obj_t * btn2 = lv_btn_create(lv_scr_act());
JohnnyK 5:071136c3eefa 71 lv_obj_add_event_cb(btn2, event_handler,LV_EVENT_ALL, NULL);
JohnnyK 5:071136c3eefa 72 lv_obj_align(btn2, LV_ALIGN_CENTER, 0, 25);
JohnnyK 5:071136c3eefa 73 lv_obj_add_flag(btn2, LV_OBJ_FLAG_CHECKABLE);
JohnnyK 5:071136c3eefa 74 label = lv_label_create(btn2);
JohnnyK 0:10c4b83c458d 75 lv_label_set_text(label, "Toggled");
JohnnyK 3:4f5dc253eb7b 76 #endif
JohnnyK 0:10c4b83c458d 77
JohnnyK 3:4f5dc253eb7b 78 while (true){
JohnnyK 3:4f5dc253eb7b 79 lv_task_handler();
JohnnyK 3:4f5dc253eb7b 80 //Call lv_task_handler() periodically every few milliseconds.
JohnnyK 3:4f5dc253eb7b 81 //It will redraw the screen if required, handle input devices etc.
JohnnyK 3:4f5dc253eb7b 82 thread_sleep_for(LVGL_TICK);
JohnnyK 0:10c4b83c458d 83 }
JohnnyK 3:4f5dc253eb7b 84 }