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https://github.com/lvgl/lvgl.git
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133 lines
4.2 KiB
C++
133 lines
4.2 KiB
C++
/*Using LVGL with Arduino requires some extra steps:
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*Be sure to read the docs here: https://docs.lvgl.io/master/get-started/platforms/arduino.html */
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#include <lvgl.h>
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#if LV_USE_TFT_ESPI
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#include <TFT_eSPI.h>
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#endif
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/*To use the built-in examples and demos of LVGL uncomment the includes below respectively.
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*You also need to copy `lvgl/examples` to `lvgl/src/examples`. Similarly for the demos `lvgl/demos` to `lvgl/src/demos`.
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*Note that the `lv_examples` library is for LVGL v7 and you shouldn't install it for this version (since LVGL v8)
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*as the examples and demos are now part of the main LVGL library. */
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//#include <examples/lv_examples.h>
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//#include <demos/lv_demos.h>
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/*Set to your screen resolution*/
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#define TFT_HOR_RES 320
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#define TFT_VER_RES 240
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/*LVGL draw into this buffer, 1/10 screen size usually works well. The size is in bytes*/
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#define DRAW_BUF_SIZE (TFT_HOR_RES * TFT_VER_RES / 10 * (LV_COLOR_DEPTH / 8))
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uint32_t draw_buf[DRAW_BUF_SIZE / 4];
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#if LV_USE_LOG != 0
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void my_print( lv_log_level_t level, const char * buf )
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{
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LV_UNUSED(level);
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Serial.println(buf);
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Serial.flush();
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}
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#endif
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/* LVGL calls it when a rendered image needs to copied to the display*/
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void my_disp_flush( lv_display_t *disp, const lv_area_t *area, uint8_t * px_map)
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{
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/*Copy `px map` to the `area`*/
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/*For example ("my_..." functions needs to be implemented by you)
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uint32_t w = lv_area_get_width(area);
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uint32_t h = lv_area_get_height(area);
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my_set_window(area->x1, area->y1, w, h);
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my_draw_bitmaps(px_map, w * h);
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*/
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/*Call it to tell LVGL you are ready*/
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lv_disp_flush_ready(disp);
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}
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/*Read the touchpad*/
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void my_touchpad_read( lv_indev_t * indev, lv_indev_data_t * data )
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{
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/*For example ("my_..." functions needs to be implemented by you)
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int32_t x, y;
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bool touched = my_get_touch( &x, &y );
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if(!touched) {
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data->state = LV_INDEV_STATE_RELEASED;
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} else {
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data->state = LV_INDEV_STATE_PRESSED;
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data->point.x = x;
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data->point.y = y;
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}
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*/
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}
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void setup()
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{
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String LVGL_Arduino = "Hello Arduino! ";
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LVGL_Arduino += String('V') + lv_version_major() + "." + lv_version_minor() + "." + lv_version_patch();
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Serial.begin( 115200 );
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Serial.println( LVGL_Arduino );
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lv_init();
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/* register print function for debugging */
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#if LV_USE_LOG != 0
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lv_log_register_print_cb( my_print );
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#endif
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lv_display_t * disp;
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#if LV_USE_TFT_ESPI
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/*TFT_eSPI can be enabled lv_conf.h to initialize the display in a simple way*/
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disp = lv_tft_espi_create(TFT_HOR_RES, TFT_VER_RES, draw_buf, sizeof(draw_buf));
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#else
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/*Else create a display yourself*/
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disp = lv_display_create(TFT_HOR_RES, TFT_VER_RES);
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lv_display_set_flush_cb(disp, my_disp_flush);
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lv_display_set_buffers(disp, draw_buf, NULL, sizeof(draw_buf), LV_DISPLAY_RENDER_MODE_PARTIAL);
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#endif
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/*Initialize the (dummy) input device driver*/
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lv_indev_t * indev = lv_indev_create();
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lv_indev_set_type(indev, LV_INDEV_TYPE_POINTER); /*Touchpad should have POINTER type*/
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lv_indev_set_read_cb(indev, my_touchpad_read);
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/* Create a simple label
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* ---------------------
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lv_obj_t *label = lv_label_create( lv_scr_act() );
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lv_label_set_text( label, "Hello Arduino, I'm LVGL!" );
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lv_obj_align( label, LV_ALIGN_CENTER, 0, 0 );
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* Try an example. See all the examples
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* - Online: https://docs.lvgl.io/master/examples.html
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* - Source codes: https://github.com/lvgl/lvgl/tree/master/examples
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* ----------------------------------------------------------------
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lv_example_btn_1();
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* Or try out a demo. Don't forget to enable the demos in lv_conf.h. E.g. LV_USE_DEMOS_WIDGETS
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* -------------------------------------------------------------------------------------------
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lv_demo_widgets();
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*/
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lv_obj_t *label = lv_label_create( lv_scr_act() );
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lv_label_set_text( label, "Hello Arduino, I'm LVGL!" );
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lv_obj_align( label, LV_ALIGN_CENTER, 0, 0 );
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Serial.println( "Setup done" );
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}
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void loop()
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{
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lv_task_handler(); /* let the GUI do its work */
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lv_tick_inc(5); /* tell LVGL how much time has passed */
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delay(5); /* let this time pass */
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}
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