L VD / LvGL_F746NG

Boilerplate library to get started with LvGL on STM DISCO F746NG board. Adapted from https://os.mbed.com/users/JohnnyK/code/DISCO-F746NG_MbedOs_LvGL_example/

Dependencies:   BSP_DISCO_F746NG

Dependents:   LvGL_F746NG_test

lvgl_f746ng.cpp@1:a23fffad1321, 2020-09-10 (annotated)

Committer:
elelthvd
Date:
Thu Sep 10 09:24:23 2020 +0000
Revision:
1:a23fffad1321
Parent:
0:cffa136e7f8f 
Add usage for Mbed Thread

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elelthvd 0:cffa136e7f8f 1
elelthvd 0:cffa136e7f8f 2 #include "lvgl_f746ng.h"
elelthvd 0:cffa136e7f8f 3
elelthvd 1:a23fffad1321 4 static void lv_ticker_func() {
elelthvd 1:a23fffad1321 5 // Call lv_tick_inc(x) every x milliseconds in a Timer or Task (x should be
elelthvd 1:a23fffad1321 6 // between 1 and 10). It is required for the internal timing of LittlevGL.
elelthvd 1:a23fffad1321 7 lv_tick_inc(LVGL_TICK_INC);
elelthvd 1:a23fffad1321 8 // Call lv_task_handler() periodically every few milliseconds.
elelthvd 1:a23fffad1321 9 // It will redraw the screen if required, handle input devices etc.
elelthvd 1:a23fffad1321 10 lv_task_handler();
elelthvd 0:cffa136e7f8f 11 }
elelthvd 0:cffa136e7f8f 12
elelthvd 1:a23fffad1321 13 #ifdef LVGL_USE_THREAD
elelthvd 1:a23fffad1321 14 static Thread lvgl_thread; // mbed Thread for lvgl
elelthvd 1:a23fffad1321 15 static void lv_thread_func() {
elelthvd 1:a23fffad1321 16 printf("lv_thread_func from context %p\n", ThisThread::get_id());
elelthvd 1:a23fffad1321 17 while (1) {
elelthvd 1:a23fffad1321 18 ThisThread::sleep_for(LVGL_TICK_INC * 1ms);
elelthvd 1:a23fffad1321 19 lv_ticker_func();
elelthvd 1:a23fffad1321 20 }
elelthvd 0:cffa136e7f8f 21 }
elelthvd 1:a23fffad1321 22 #else
elelthvd 1:a23fffad1321 23 static Ticker lvgl_ticker; // mbed Ticker for lvgl
elelthvd 1:a23fffad1321 24 #endif /* LVGL_USE_THREAD */
elelthvd 1:a23fffad1321 25
elelthvd 1:a23fffad1321 26 /* Initialize lvgl + target port specifics + mbed ticker or thread. */
elelthvd 1:a23fffad1321 27 void lvgl_f746ng_init() {
elelthvd 1:a23fffad1321 28 printf("lvgl_f746ng_init from context %p\n", ThisThread::get_id());
elelthvd 1:a23fffad1321 29 lv_init(); // Initialize the LittlevGL
elelthvd 1:a23fffad1321 30 lv_port_disp_init(); // Initialize diplay
elelthvd 1:a23fffad1321 31 lv_port_indev_init(); // Initialize touchpad
elelthvd 1:a23fffad1321 32 #ifdef LVGL_USE_THREAD
elelthvd 1:a23fffad1321 33 // Approach using mbed Thread
elelthvd 1:a23fffad1321 34 lvgl_thread.start(lv_thread_func);
elelthvd 1:a23fffad1321 35 // lvgl_thread.join(); // it will never join
elelthvd 1:a23fffad1321 36 #else
elelthvd 1:a23fffad1321 37 // Approach using mbed Ticker
elelthvd 1:a23fffad1321 38 lvgl_ticker.attach(callback(&lv_ticker_func), LVGL_TICK_INC * 1ms);
elelthvd 1:a23fffad1321 39 #endif /* LVGL_USE_THREAD */
elelthvd 1:a23fffad1321 40 }
elelthvd 1:a23fffad1321 41