Description
How to correctly realize the touch function in 8. X?
What MCU/Processor/Board and compiler are you using?
ESP32-DOWDQ6-V1 + FT6336U
Microsoft VS Code + platformio + arduino
What do you want to achieve?
Touch
What have you tried so far?
7.X：
getTouchInput
printable result
8.X:
fail
Code to reproduce
#include <lvgl.h>
#include <TFT_eSPI.h>
static const uint16_t screenWidth = 320;
static const uint16_t screenHeight = 240;
static lv_disp_draw_buf_t draw_buf;
static lv_color_t buf[screenWidth * 10];
TFT_eSPI tft = TFT_eSPI(screenWidth, screenHeight); /* TFT instance */
void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
{
uint32_t w = (area->x2 - area->x1 + 1);
uint32_t h = (area->y2 - area->y1 + 1);
tft.startWrite();
tft.setAddrWindow(area->x1, area->y1, w, h);
tft.pushColors((uint16_t *)&color_p->full, w * h, true);
tft.endWrite();
lv_disp_flush_ready(disp);
}
void getTouchInput(lv_indev_drv_t *indev_driver, lv_indev_data_t *data)
{
Serial.print(" x ");
}
void setup()
{
Serial.begin(115200);
String LVGL_Arduino = "Hello Arduino! ";
LVGL_Arduino += String('V') + lv_version_major() + "." + lv_version_minor() + "." + lv_version_patch();
Serial.println(LVGL_Arduino);
Serial.println("I am LVGL_Arduino");
lv_init();
tft.begin();
tft.setRotation(0);
lv_disp_draw_buf_init(&draw_buf, buf, NULL, screenWidth * 10);
static lv_disp_drv_t disp_drv;
lv_disp_drv_init(&disp_drv);
disp_drv.hor_res = screenWidth;
disp_drv.ver_res = screenHeight;
disp_drv.flush_cb = my_disp_flush;
disp_drv.draw_buf = &draw_buf;
lv_disp_drv_register(&disp_drv);
static lv_indev_drv_t indev_drv;
lv_indev_drv_init(&indev_drv);
indev_drv.type = LV_INDEV_TYPE_POINTER;
indev_drv.read_cb = getTouchInput;
lv_indev_t *my_indev = lv_indev_drv_register(&indev_drv);
lv_obj_t *label = lv_label_create(lv_scr_act());
lv_label_set_text(label, LVGL_Arduino.c_str());
lv_obj_align(label, LV_ALIGN_CENTER, 0, 0);
Serial.println("Setup done");
}
void loop()
{
lv_timer_handler();
delay(5);
}
static lv_indev_drv_t indev_drv;
lv_indev_drv_init(&indev_drv);
indev_drv.type = LV_INDEV_TYPE_POINTER;
indev_drv.read_cb = getTouchInput;
lv_indev_drv_register(&indev_drv);
Screenshot and/or video
where am i going wrong 
