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feat(example): make "LVGL_Arduino.ino" easier to use (#6001)

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Klaus Musch 2024-04-06 12:10:32 +02:00 committed by GitHub
parent 3e21769fa6
commit b74d34407f
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2 changed files with 33 additions and 3 deletions
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7
examples/arduino/LVGL_Arduino/LVGL_Arduino.ino
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@ -1,5 +1,5 @@
/*Using LVGL with Arduino requires some extra steps:
*Be sure to read the docs here: https://docs.lvgl.io/master/get-started/platforms/arduino.html */
*Be sure to read the docs here: https://docs.lvgl.io/master/integration/framework/arduino.html */
#include <lvgl.h>
@ -15,9 +15,10 @@
//#include <examples/lv_examples.h>
//#include <demos/lv_demos.h>
/*Set to your screen resolution*/
/*Set to your screen resolution and rotation*/
#define TFT_HOR_RES 320
#define TFT_VER_RES 240
#define TFT_ROTATION LV_DISPLAY_ROTATION_0
/*LVGL draw into this buffer, 1/10 screen size usually works well. The size is in bytes*/
#define DRAW_BUF_SIZE (TFT_HOR_RES * TFT_VER_RES / 10 * (LV_COLOR_DEPTH / 8))
@ -95,6 +96,8 @@ void setup()
#if LV_USE_TFT_ESPI
/*TFT_eSPI can be enabled lv_conf.h to initialize the display in a simple way*/
disp = lv_tft_espi_create(TFT_HOR_RES, TFT_VER_RES, draw_buf, sizeof(draw_buf));
lv_display_set_rotation(disp, TFT_ROTATION);
#else
/*Else create a display yourself*/
disp = lv_display_create(TFT_HOR_RES, TFT_VER_RES);

29
src/drivers/display/tft_espi/lv_tft_espi.cpp
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@ -26,6 +26,7 @@ typedef struct {
* STATIC PROTOTYPES
**********************/
static void flush_cb(lv_display_t * disp, const lv_area_t * area, uint8_t * px_map);
static void resolution_changed_event_cb(lv_event_t * e);
/**********************
* STATIC VARIABLES
@ -53,9 +54,10 @@ lv_display_t * lv_tft_espi_create(uint32_t hor_res, uint32_t ver_res, void * buf
dsc->tft = new TFT_eSPI(hor_res, ver_res);
dsc->tft->begin(); /* TFT init */
dsc->tft->setRotation(3); /* Landscape orientation, flipped */
dsc->tft->setRotation(0);
lv_display_set_driver_data(disp, (void *)dsc);
lv_display_set_flush_cb(disp, flush_cb);
lv_display_add_event_cb(disp, resolution_changed_event_cb, LV_EVENT_RESOLUTION_CHANGED, NULL);
lv_display_set_buffers(disp, (void *)buf, NULL, buf_size_bytes, LV_DISPLAY_RENDER_MODE_PARTIAL);
return disp;
}
@ -80,4 +82,29 @@ static void flush_cb(lv_display_t * disp, const lv_area_t * area, uint8_t * px_m
}
static void resolution_changed_event_cb(lv_event_t * e)
{
lv_display_t * disp = (lv_display_t *)lv_event_get_target(e);
lv_tft_espi_t * dsc = (lv_tft_espi_t *)lv_display_get_driver_data(disp);
int32_t hor_res = lv_display_get_horizontal_resolution(disp);
int32_t ver_res = lv_display_get_vertical_resolution(disp);
lv_display_rotation_t rot = lv_display_get_rotation(disp);
/* handle rotation */
switch(rot) {
case LV_DISPLAY_ROTATION_0:
dsc->tft->setRotation(0); /* Portrait orientation */
break;
case LV_DISPLAY_ROTATION_90:
dsc->tft->setRotation(1); /* Landscape orientation */
break;
case LV_DISPLAY_ROTATION_180:
dsc->tft->setRotation(2); /* Portrait orientation, flipped */
break;
case LV_DISPLAY_ROTATION_270:
dsc->tft->setRotation(3); /* Landscape orientation, flipped */
break;
}
}
#endif /*LV_USE_TFT_ESPI*/