Help with migration to ESP32_Display_Panel Release v1.0.3 or 1.0.4 #231

brightproject · 2025-08-06T10:39:19Z

brightproject
Aug 6, 2025

I use a display with a st77916 controller, microcontroller esp32s3 and arduino framework.

platform = 
  ; Arduino Core 3.3.0 based on ESP-IDF v5.5.0 for Platformio
  https://github.com/pioarduino/platform-espressif32/releases/download/55.03.30-2/platform-espressif32.zip
framework = arduino

Previously I used the following software versions:

Dependency Graph
|-- ESP32_IO_Expander @ 0.0.2
|-- ESP32_Display_Panel @ 0.1.4

The file for working with the display, written for lvgl 8, is as follows:

scr_st77916.zip

The file includes pins and necessary libraries:

#include "pincfg.h"
#include <lvgl.h>
#include <ESP_IOExpander.h>
#include <ESP_Panel_Library.h>

In the specified configuration, everything worked fine for me, the image was drawn and there were no problems.

Until I started using rtos with esp32s3 and immediately my image started breaking

And the microcontroller writes this error:

E (3347) lcd_panel.io.spi: panel_io_spi_tx_color(395): spi transmit (queue) color failed

After that it was decided to update ESP32_Display_Panel, and it immediately became clear that the migration would be very difficult, painful and I would probably fail.

First, I downloaded the latest ESP32_Display_Panel repository and the necessary dependencies.

https://github.com/esp-arduino-libs/ESP32_Display_Panel/blob/master/library.properties

Then I looked at the examples inside the repository and realized that the examples were very confusing, since the example for Arduino and for Platformio contradict each other and use different sets of files and code syntax.
But this is not the worst thing, I began to gradually bring my scr_st77916_new.h file to a new look using the i2c and qspi bus configuration functions.
My directory with files turned out like this:

The display config file in the mail.cpp file is as follows:

#include "Arduino.h"
// #include "display_drivers/scr_st77916.h"
#include "display_drivers/scr_st77916_new.h"
#include <lvgl.h>

The contents of the file are as follows:

#ifndef _SCR_ST77916_H_
#define _SCR_ST77916_H_

#include "pincfg.h"
#include <lvgl.h>

// enables ESP32_IO_Expander at once
#include <esp_display_panel.hpp>

using namespace esp_panel::drivers;

/*Change to your screen resolution*/
// static const uint16_t screenWidth  = 320;
// static const uint16_t screenHeight = 170;

#define SCREEN_RES_HOR 280
#define SCREEN_RES_VER 280
// #define SCREEN_RES_HOR 359
// #define SCREEN_RES_VER 359

/* When using settings, you need to reduce the screen buffer */
// #define SCREEN_RES_HOR 300
// #define SCREEN_RES_VER 300

// to offset the reduced screen from the origin
#define RATIO  (360 - SCREEN_RES_HOR) / 2

extern int brightness;

// static lv_color_t *disp_draw_buf;
static lv_color_t *disp_draw_buf = NULL;
static lv_color_t *buf1 = NULL;
static lv_color_t *buf2 = NULL;
static lv_disp_draw_buf_t draw_buf;
static lv_disp_drv_t disp_drv;
// static lv_indev_t *indev_touchpad;
// static ESP_PanelBacklight *backlight = NULL;
BacklightPWM_LEDC *backlight;
static ESP_PanelLcd *lcd = NULL;
// static ESP_PanelTouch *touch = NULL;
Touch *touch = nullptr;

#define _EXAMPLE_TOUCH_CLASS(name, ...) Touch##name(__VA_ARGS__)
#define EXAMPLE_TOUCH_CLASS(name, ...)  _EXAMPLE_TOUCH_CLASS(name, ##__VA_ARGS__)

// new setup
uint32_t screenWidth;
uint32_t screenHeight;
uint32_t drawBufSize;

#define USE_CUSTOM_INIT_CMD 0 // 是否用自定义的初始化代码

#if TOUCH_PIN_NUM_INT >= 0

IRAM_ATTR bool onTouchInterruptCallback(void *user_data)
{
  return false;
}

#endif

const esp_lcd_panel_vendor_init_cmd_t lcd_init_cmd[] = {
    {0xF0, (uint8_t[]){0x08}, 1, 0},
    {0xF2, (uint8_t[]){0x08}, 1, 0},
    {0x9B, (uint8_t[]){0x51}, 1, 0},
    {0x86, (uint8_t[]){0x53}, 1, 0},
    {0xF2, (uint8_t[]){0x80}, 1, 0},
    {0xF0, (uint8_t[]){0x00}, 1, 0},
    {0xF0, (uint8_t[]){0x01}, 1, 0},
    {0xF1, (uint8_t[]){0x01}, 1, 0},
    {0xB0, (uint8_t[]){0x54}, 1, 0},
    {0xB1, (uint8_t[]){0x3F}, 1, 0},
    {0xB2, (uint8_t[]){0x2A}, 1, 0},
    {0xB4, (uint8_t[]){0x46}, 1, 0},
    {0xB5, (uint8_t[]){0x34}, 1, 0},
    {0xB6, (uint8_t[]){0xD5}, 1, 0},
    {0xB7, (uint8_t[]){0x30}, 1, 0},
    {0xBA, (uint8_t[]){0x00}, 1, 0},
    {0xBB, (uint8_t[]){0x08}, 1, 0},
    {0xBC, (uint8_t[]){0x08}, 1, 0},
    {0xBD, (uint8_t[]){0x00}, 1, 0},
    {0xC0, (uint8_t[]){0x80}, 1, 0},
    {0xC1, (uint8_t[]){0x10}, 1, 0},
    {0xC2, (uint8_t[]){0x37}, 1, 0},
    {0xC3, (uint8_t[]){0x80}, 1, 0},
    {0xC4, (uint8_t[]){0x10}, 1, 0},
    {0xC5, (uint8_t[]){0x37}, 1, 0},
    {0xC6, (uint8_t[]){0xA9}, 1, 0},
    {0xC7, (uint8_t[]){0x41}, 1, 0},
    {0xC8, (uint8_t[]){0x51}, 1, 0},
    {0xC9, (uint8_t[]){0xA9}, 1, 0},
    {0xCA, (uint8_t[]){0x41}, 1, 0},
    {0xCB, (uint8_t[]){0x51}, 1, 0},
    {0xD0, (uint8_t[]){0x91}, 1, 0},
    {0xD1, (uint8_t[]){0x68}, 1, 0},
    {0xD2, (uint8_t[]){0x69}, 1, 0},
    {0xF5, (uint8_t[]){0x00, 0xA5}, 2, 0},
    {0xDD, (uint8_t[]){0x3F}, 1, 0},
    {0xDE, (uint8_t[]){0x3F}, 1, 0},
    {0xF1, (uint8_t[]){0x10}, 1, 0},
    {0xF0, (uint8_t[]){0x00}, 1, 0},
    {0xF0, (uint8_t[]){0x02}, 1, 0},
    {0xE0, (uint8_t[]){0x70, 0x09, 0x12, 0x0C, 0x0B, 0x27, 0x38, 0x54, 0x4E, 0x19, 0x15, 0x15, 0x2C, 0x2F}, 14, 0},
    {0xE1, (uint8_t[]){0x70, 0x08, 0x11, 0x0C, 0x0B, 0x27, 0x38, 0x43, 0x4C, 0x18, 0x14, 0x14, 0x2B, 0x2D}, 14, 0},
    {0xF0, (uint8_t[]){0x10}, 1, 0},
    {0xF3, (uint8_t[]){0x10}, 1, 0},
    {0xE0, (uint8_t[]){0x08}, 1, 0},
    {0xE1, (uint8_t[]){0x00}, 1, 0},
    {0xE2, (uint8_t[]){0x00}, 1, 0},
    {0xE3, (uint8_t[]){0x00}, 1, 0},
    {0xE4, (uint8_t[]){0xE0}, 1, 0},
    {0xE5, (uint8_t[]){0x06}, 1, 0},
    {0xE6, (uint8_t[]){0x21}, 1, 0},
    {0xE7, (uint8_t[]){0x00}, 1, 0},
    {0xE8, (uint8_t[]){0x05}, 1, 0},
    {0xE9, (uint8_t[]){0x82}, 1, 0},
    {0xEA, (uint8_t[]){0xDF}, 1, 0},
    {0xEB, (uint8_t[]){0x89}, 1, 0},
    {0xEC, (uint8_t[]){0x20}, 1, 0},
    {0xED, (uint8_t[]){0x14}, 1, 0},
    {0xEE, (uint8_t[]){0xFF}, 1, 0},
    {0xEF, (uint8_t[]){0x00}, 1, 0},
    {0xF8, (uint8_t[]){0xFF}, 1, 0},
    {0xF9, (uint8_t[]){0x00}, 1, 0},
    {0xFA, (uint8_t[]){0x00}, 1, 0},
    {0xFB, (uint8_t[]){0x30}, 1, 0},
    {0xFC, (uint8_t[]){0x00}, 1, 0},
    {0xFD, (uint8_t[]){0x00}, 1, 0},
    {0xFE, (uint8_t[]){0x00}, 1, 0},
    {0xFF, (uint8_t[]){0x00}, 1, 0},
    {0x60, (uint8_t[]){0x42}, 1, 0},
    {0x61, (uint8_t[]){0xE0}, 1, 0},
    {0x62, (uint8_t[]){0x40}, 1, 0},
    {0x63, (uint8_t[]){0x40}, 1, 0},
    {0x64, (uint8_t[]){0x02}, 1, 0},
    {0x65, (uint8_t[]){0x00}, 1, 0},
    {0x66, (uint8_t[]){0x40}, 1, 0},
    {0x67, (uint8_t[]){0x03}, 1, 0},
    {0x68, (uint8_t[]){0x00}, 1, 0},
    {0x69, (uint8_t[]){0x00}, 1, 0},
    {0x6A, (uint8_t[]){0x00}, 1, 0},
    {0x6B, (uint8_t[]){0x00}, 1, 0},
    {0x70, (uint8_t[]){0x42}, 1, 0},
    {0x71, (uint8_t[]){0xE0}, 1, 0},
    {0x72, (uint8_t[]){0x40}, 1, 0},
    {0x73, (uint8_t[]){0x40}, 1, 0},
    {0x74, (uint8_t[]){0x02}, 1, 0},
    {0x75, (uint8_t[]){0x00}, 1, 0},
    {0x76, (uint8_t[]){0x40}, 1, 0},
    {0x77, (uint8_t[]){0x03}, 1, 0},
    {0x78, (uint8_t[]){0x00}, 1, 0},
    {0x79, (uint8_t[]){0x00}, 1, 0},
    {0x7A, (uint8_t[]){0x00}, 1, 0},
    {0x7B, (uint8_t[]){0x00}, 1, 0},
    {0x80, (uint8_t[]){0x48}, 1, 0},
    {0x81, (uint8_t[]){0x00}, 1, 0},
    {0x82, (uint8_t[]){0x05}, 1, 0},
    {0x83, (uint8_t[]){0x02}, 1, 0},
    {0x84, (uint8_t[]){0xDD}, 1, 0},
    {0x85, (uint8_t[]){0x00}, 1, 0},
    {0x86, (uint8_t[]){0x00}, 1, 0},
    {0x87, (uint8_t[]){0x00}, 1, 0},
    {0x88, (uint8_t[]){0x48}, 1, 0},
    {0x89, (uint8_t[]){0x00}, 1, 0},
    {0x8A, (uint8_t[]){0x07}, 1, 0},
    {0x8B, (uint8_t[]){0x02}, 1, 0},
    {0x8C, (uint8_t[]){0xDF}, 1, 0},
    {0x8D, (uint8_t[]){0x00}, 1, 0},
    {0x8E, (uint8_t[]){0x00}, 1, 0},
    {0x8F, (uint8_t[]){0x00}, 1, 0},
    {0x90, (uint8_t[]){0x48}, 1, 0},
    {0x91, (uint8_t[]){0x00}, 1, 0},
    {0x92, (uint8_t[]){0x09}, 1, 0},
    {0x93, (uint8_t[]){0x02}, 1, 0},
    {0x94, (uint8_t[]){0xE1}, 1, 0},
    {0x95, (uint8_t[]){0x00}, 1, 0},
    {0x96, (uint8_t[]){0x00}, 1, 0},
    {0x97, (uint8_t[]){0x00}, 1, 0},
    {0x98, (uint8_t[]){0x48}, 1, 0},
    {0x99, (uint8_t[]){0x00}, 1, 0},
    {0x9A, (uint8_t[]){0x0B}, 1, 0},
    {0x9B, (uint8_t[]){0x02}, 1, 0},
    {0x9C, (uint8_t[]){0xE3}, 1, 0},
    {0x9D, (uint8_t[]){0x00}, 1, 0},
    {0x9E, (uint8_t[]){0x00}, 1, 0},
    {0x9F, (uint8_t[]){0x00}, 1, 0},
    {0xA0, (uint8_t[]){0x48}, 1, 0},
    {0xA1, (uint8_t[]){0x00}, 1, 0},
    {0xA2, (uint8_t[]){0x04}, 1, 0},
    {0xA3, (uint8_t[]){0x02}, 1, 0},
    {0xA4, (uint8_t[]){0xDC}, 1, 0},
    {0xA5, (uint8_t[]){0x00}, 1, 0},
    {0xA6, (uint8_t[]){0x00}, 1, 0},
    {0xA7, (uint8_t[]){0x00}, 1, 0},
    {0xA8, (uint8_t[]){0x48}, 1, 0},
    {0xA9, (uint8_t[]){0x00}, 1, 0},
    {0xAA, (uint8_t[]){0x06}, 1, 0},
    {0xAB, (uint8_t[]){0x02}, 1, 0},
    {0xAC, (uint8_t[]){0xDE}, 1, 0},
    {0xAD, (uint8_t[]){0x00}, 1, 0},
    {0xAE, (uint8_t[]){0x00}, 1, 0},
    {0xAF, (uint8_t[]){0x00}, 1, 0},
    {0xB0, (uint8_t[]){0x48}, 1, 0},
    {0xB1, (uint8_t[]){0x00}, 1, 0},
    {0xB2, (uint8_t[]){0x08}, 1, 0},
    {0xB3, (uint8_t[]){0x02}, 1, 0},
    {0xB4, (uint8_t[]){0xE0}, 1, 0},
    {0xB5, (uint8_t[]){0x00}, 1, 0},
    {0xB6, (uint8_t[]){0x00}, 1, 0},
    {0xB7, (uint8_t[]){0x00}, 1, 0},
    {0xB8, (uint8_t[]){0x48}, 1, 0},
    {0xB9, (uint8_t[]){0x00}, 1, 0},
    {0xBA, (uint8_t[]){0x0A}, 1, 0},
    {0xBB, (uint8_t[]){0x02}, 1, 0},
    {0xBC, (uint8_t[]){0xE2}, 1, 0},
    {0xBD, (uint8_t[]){0x00}, 1, 0},
    {0xBE, (uint8_t[]){0x00}, 1, 0},
    {0xBF, (uint8_t[]){0x00}, 1, 0},
    {0xC0, (uint8_t[]){0x12}, 1, 0},
    {0xC1, (uint8_t[]){0xAA}, 1, 0},
    {0xC2, (uint8_t[]){0x65}, 1, 0},
    {0xC3, (uint8_t[]){0x74}, 1, 0},
    {0xC4, (uint8_t[]){0x47}, 1, 0},
    {0xC5, (uint8_t[]){0x56}, 1, 0},
    {0xC6, (uint8_t[]){0x00}, 1, 0},
    {0xC7, (uint8_t[]){0x88}, 1, 0},
    {0xC8, (uint8_t[]){0x99}, 1, 0},
    {0xC9, (uint8_t[]){0x33}, 1, 0},
    {0xD0, (uint8_t[]){0x21}, 1, 0},
    {0xD1, (uint8_t[]){0xAA}, 1, 0},
    {0xD2, (uint8_t[]){0x65}, 1, 0},
    {0xD3, (uint8_t[]){0x74}, 1, 0},
    {0xD4, (uint8_t[]){0x47}, 1, 0},
    {0xD5, (uint8_t[]){0x56}, 1, 0},
    {0xD6, (uint8_t[]){0x00}, 1, 0},
    {0xD7, (uint8_t[]){0x88}, 1, 0},
    {0xD8, (uint8_t[]){0x99}, 1, 0},
    {0xD9, (uint8_t[]){0x33}, 1, 0},
    {0xF3, (uint8_t[]){0x01}, 1, 0},
    {0xF0, (uint8_t[]){0x00}, 1, 0},
    {0xF0, (uint8_t[]){0x01}, 1, 0},
    {0xF1, (uint8_t[]){0x01}, 1, 0},
    {0xA0, (uint8_t[]){0x0B}, 1, 0},
    {0xA3, (uint8_t[]){0x2A}, 1, 0},
    {0xA5, (uint8_t[]){0xC3}, 1, 1},
    {0xA3, (uint8_t[]){0x2B}, 1, 0},
    {0xA5, (uint8_t[]){0xC3}, 1, 1},
    {0xA3, (uint8_t[]){0x2C}, 1, 0},
    {0xA5, (uint8_t[]){0xC3}, 1, 1},
    {0xA3, (uint8_t[]){0x2D}, 1, 0},
    {0xA5, (uint8_t[]){0xC3}, 1, 1},
    {0xA3, (uint8_t[]){0x2E}, 1, 0},
    {0xA5, (uint8_t[]){0xC3}, 1, 1},
    {0xA3, (uint8_t[]){0x2F}, 1, 0},
    {0xA5, (uint8_t[]){0xC3}, 1, 1},
    {0xA3, (uint8_t[]){0x30}, 1, 0},
    {0xA5, (uint8_t[]){0xC3}, 1, 1},
    {0xA3, (uint8_t[]){0x31}, 1, 0},
    {0xA5, (uint8_t[]){0xC3}, 1, 1},
    {0xA3, (uint8_t[]){0x32}, 1, 0},
    {0xA5, (uint8_t[]){0xC3}, 1, 1},
    {0xA3, (uint8_t[]){0x33}, 1, 0},
    {0xA5, (uint8_t[]){0xC3}, 1, 1},
    {0xA0, (uint8_t[]){0x09}, 1, 0},
    {0xF1, (uint8_t[]){0x10}, 1, 0},
    {0xF0, (uint8_t[]){0x00}, 1, 0},
    {0x2A, (uint8_t[]){0x00, 0x00, 0x01, 0x67}, 4, 0},
    {0x2B, (uint8_t[]){0x01, 0x68, 0x01, 0x68}, 4, 0},
    {0x4D, (uint8_t[]){0x00}, 1, 0},
    {0x4E, (uint8_t[]){0x00}, 1, 0},
    {0x4F, (uint8_t[]){0x00}, 1, 0},
    {0x4C, (uint8_t[]){0x01}, 1, 10},
    {0x4C, (uint8_t[]){0x00}, 1, 0},
    {0x2A, (uint8_t[]){0x00, 0x00, 0x01, 0x67}, 4, 0},
    {0x2B, (uint8_t[]){0x00, 0x00, 0x01, 0x67}, 4, 0},
    {0x21, (uint8_t[]){0x00}, 1, 0},
    //{0x3A, (uint8_t[]){0x55}, 1, 0}, // color=16
    {0x11, (uint8_t[]){0x00}, 1, 120},
    {0x29, (uint8_t[]){0x00}, 1, 0},
};

#define TFT_SPI_FREQ_HZ (30 * 1000 * 1000)

static void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
{
  ESP_PanelLcd *lcd = (ESP_PanelLcd *)disp->user_data;
  const int offsetx1 = area->x1;
  const int offsetx2 = area->x2;
  const int offsety1 = area->y1;
  const int offsety2 = area->y2;
  // lcd->drawBitmap(offsetx1, offsety1, offsetx2 - offsetx1 + 1, offsety2 - offsety1 + 1, (const uint8_t *)color_p);
  lcd->drawBitmap(offsetx1 + RATIO, offsety1 + RATIO, offsetx2 - offsetx1 + 1, offsety2 - offsety1 + 1, (const uint8_t *)color_p);
}

IRAM_ATTR bool onRefreshFinishCallback(void *user_data)
{
  lv_disp_drv_t *drv = (lv_disp_drv_t *)user_data;
  lv_disp_flush_ready(drv);
  return false;
}

void setRotation(uint8_t rot)
{
  if (rot > 3)
    return;
  if (lcd == NULL || touch == NULL)
    return;

  switch (rot)
  {
  case 1: // 顺时针90度
    lcd->swapXY(true);
    lcd->mirrorX(true);
    lcd->mirrorY(false);
    touch->swapXY(true);
    touch->mirrorX(true);
    touch->mirrorY(false);
    break;
  case 2:
    lcd->swapXY(false);
    lcd->mirrorX(true);
    lcd->mirrorY(true);
    touch->swapXY(false);
    touch->mirrorX(true);
    touch->mirrorY(true);
    break;
  case 3:
    lcd->swapXY(true);
    lcd->mirrorX(false);
    lcd->mirrorY(true);
    touch->swapXY(true);
    touch->mirrorX(false);
    touch->mirrorY(true);
    break;
  default:
    lcd->swapXY(false);
    lcd->mirrorX(false);
    lcd->mirrorY(false);
    touch->swapXY(false);
    touch->mirrorX(false);
    touch->mirrorY(false);
    break;
  }
}

void screen_switch(bool on)
{
  if (NULL == backlight)
    return;
  if (on)
    backlight->on();
  else
    backlight->off();
}

// 输入值为0-100
void set_brightness(uint8_t bri)
{
  if (NULL == backlight)
    return;
  backlight->setBrightness(bri);
}

/* static void touchpad_read(lv_indev_drv_t *indev_drv, lv_indev_data_t *data)
{
  ESP_PanelTouch *tp = (ESP_PanelTouch *)indev_drv->user_data;
  ESP_PanelTouchPoint point;

  int read_touch_result = tp->readPoints(&point, 1);
  if (read_touch_result > 0)
  {
    data->point.x = point.x;
    data->point.y = point.y;
    data->state = LV_INDEV_STATE_PRESSED;
  }
  else
  {
    data->state = LV_INDEV_STATE_RELEASED;
  }
} */

/* static lv_indev_t *indev_init(ESP_PanelTouch *tp)
{
  ESP_UTILS_CHECK_FALSE_RETURN(tp != nullptr, nullptr, "Invalid touch device");
  ESP_UTILS_CHECK_FALSE_RETURN(tp->getHandle() != nullptr, nullptr, "Touch device is not initialized");
  static lv_indev_drv_t indev_drv_tp;
  lv_indev_drv_init(&indev_drv_tp);
  indev_drv_tp.type = LV_INDEV_TYPE_POINTER;
  indev_drv_tp.read_cb = touchpad_read;
  indev_drv_tp.user_data = (void *)tp;
  return lv_indev_drv_register(&indev_drv_tp);
} */

static Touch *create_touch_without_config(void)
{
    BusI2C *bus = new BusI2C(
        TOUCH_PIN_NUM_I2C_SCL, TOUCH_PIN_NUM_I2C_SDA,
        (BusI2C::ControlPanelFullConfig)ESP_PANEL_TOUCH_I2C_CONTROL_PANEL_CONFIG(TOUCH_NAME)
        
        // mystical error with incomprehensible define
        // lib/ESP32_Display_Panel/src/drivers/touch/esp_panel_touch.hpp:761:5: error: 'ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG_WITH_ADDR' was not declared in this scope;
        // (BusI2C::ControlPanelFullConfig)ESP_PANEL_TOUCH_I2C_CONTROL_PANEL_CONFIG_WITH_ADDR(TOUCH_NAME, TOUCH_IO_I2C_CST816S_ADDRESS)

        // (BusI2C::ControlPanelFullConfig)ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG()
    );

    /**
     * Take GT911 as an example, the following is the actual code after macro expansion:
     *      TouchGT911(bus, 320, 240, 13, 14);
     */
    return new EXAMPLE_TOUCH_CLASS(
        TOUCH_NAME, bus, SCREEN_RES_HOR, SCREEN_RES_VER,
        TOUCH_PIN_NUM_RST, TOUCH_PIN_NUM_INT
    );
}

void scr_lvgl_init()
{
  ledc_timer_config_t ledc_timer = {
      .speed_mode = LEDC_LOW_SPEED_MODE,
      .duty_resolution = LEDC_TIMER_13_BIT,
      .timer_num = LEDC_TIMER_0,
      .freq_hz = 1000,
      // .freq_hz = 5000,
      .clk_cfg = LEDC_AUTO_CLK};
  ESP_ERROR_CHECK(ledc_timer_config(&ledc_timer));

  ledc_channel_config_t ledc_channel = {
      .gpio_num = (TFT_BLK),
      .speed_mode = LEDC_LOW_SPEED_MODE,
      .channel = LEDC_CHANNEL_0,
      .intr_type = LEDC_INTR_DISABLE,
      .timer_sel = LEDC_TIMER_0,
      .duty = 0,
      .hpoint = 0};

  ESP_ERROR_CHECK(ledc_channel_config(&ledc_channel));

  // backlight = new ESP_PanelBacklight(ledc_timer, ledc_channel);
  // BacklightPWM_LEDC *backlight = new BacklightPWM_LEDC(TFT_BLK, 50);
  backlight = new BacklightPWM_LEDC(TFT_BLK, 50);
  backlight->begin();
  backlight->off();
  
  // touch_bus->configI2cFreqHz(400000);
  // touch_bus->begin();
  
  // touch = new ESP_PanelTouch_CST816S(touch_bus, SCREEN_RES_HOR, SCREEN_RES_VER, TOUCH_PIN_NUM_RST, TOUCH_PIN_NUM_INT);
  
  touch = create_touch_without_config();
  
  /* Configure bus and touch before startup */
  auto bus = static_cast<BusI2C *>(touch->getBus());
  bus->configI2C_FreqHz(TOUCH_I2C_FREQ_HZ);
  bus->configI2C_PullupEnable(TOUCH_I2C_SDA_PULLUP, TOUCH_I2C_SCL_PULLUP);
  touch->configResetActiveLevel(TOUCH_RST_ACTIVE_LEVEL);
  
  /* Startup the LCD and operate it */
  assert(touch->begin());

  // touch->init();
  // touch->begin();

/* #if TOUCH_PIN_NUM_INT >= 0
  touch->attachInterruptCallback(onTouchInterruptCallback, NULL);
#endif */

  ESP_PanelBus_QSPI *panel_bus = new ESP_PanelBus_QSPI(TFT_CS, TFT_SCK, TFT_SDA0, TFT_SDA1, TFT_SDA2, TFT_SDA3);
  panel_bus->configQspiFreqHz(TFT_SPI_FREQ_HZ);
  panel_bus->begin();

  lcd = new ESP_PanelLcd_ST77916(panel_bus, 16, TFT_RST);
  // lcd = new ESP_PanelLcd_ST77916(panel_bus, 8, TFT_RST);
  // 注意，初始化代码的设置必须在INIT之前
  // lcd->configVendorCommands(lcd_init_cmd, sizeof(lcd_init_cmd) / sizeof(lcd_init_cmd[0]));
  lcd->init();
  lcd->reset();
  lcd->begin();

  lcd->invertColor(true);
  // lcd->invertColor(false);
  // setRotation(0);  //设置屏幕方向
  lcd->displayOn();

  screen_switch(true);
  // backlight->setBrightness(100); // 设置亮度
  // backlight->setBrightness(brightness); // 设置亮度

  size_t lv_cache_rows = 72;
  // size_t lv_buffer_size = SCREEN_RES_HOR * SCREEN_RES_VER * sizeof(lv_color_t);
  size_t lv_buffer_size = SCREEN_RES_HOR * SCREEN_RES_VER;
  disp_draw_buf = (lv_color_t *)heap_caps_malloc(lv_cache_rows * SCREEN_RES_HOR * 2, MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
  // disp_draw_buf = (lv_color_t *)ps_malloc(lv_buffer_size);
  assert(disp_draw_buf);
  // buf1 = (lv_color_t *)ps_malloc(lv_buffer_size);
  buf1 = (lv_color_t *)heap_caps_malloc(lv_buffer_size, MALLOC_CAP_SPIRAM);
  assert(buf1);
  lv_init();
  lv_disp_draw_buf_init(&draw_buf, disp_draw_buf, buf1, SCREEN_RES_HOR * lv_cache_rows);
  // lv_disp_draw_buf_init(&draw_buf, disp_draw_buf, buf1, SCREEN_RES_HOR * SCREEN_RES_VER);

/*   // new setup
  drawBufSize = screenWidth * screenHeight;
  buf1= (lv_color_t*)heap_caps_malloc(drawBufSize, MALLOC_CAP_SPIRAM);
  assert(buf1);
  buf2 = (lv_color_t*)heap_caps_malloc(drawBufSize, MALLOC_CAP_SPIRAM);
  assert(buf2);

  lv_init();
  lv_disp_draw_buf_init(&draw_buf, buf1, buf2, SCREEN_RES_HOR * SCREEN_RES_VER); */

  lv_disp_drv_init(&disp_drv);
  disp_drv.hor_res = SCREEN_RES_HOR;
  disp_drv.ver_res = SCREEN_RES_VER;
  disp_drv.flush_cb = my_disp_flush;
  disp_drv.draw_buf = &draw_buf;
  disp_drv.user_data = (void *)lcd;
  lv_disp_t *disp = lv_disp_drv_register(&disp_drv);

  if (lcd->getBus()->getType() != ESP_PANEL_BUS_TYPE_SPI)
  // if (lcd->getBus()->getType() != ESP_PANEL_BUS_TYPE_RGB)
  {
    lcd->attachRefreshFinishCallback(onRefreshFinishCallback, (void *)disp->driver);
  }
  // indev_touchpad = indev_init(touch);
}

#endif  // _SCR_ST77916_H_

At the moment I have stopped migrating to the new BusQSPI function instead of ESP_PanelBus_QSPI
Before that I was struggling with the touch panel and still couldn't solve the problem, for some reason when you specify the following line in the create_touch_without_config function

(BusI2C::ControlPanelFullConfig)ESP_PANEL_TOUCH_I2C_CONTROL_PANEL_CONFIG_WITH_ADDR(TOUCH_NAME, TOUCH_IO_I2C_CST816S_ADDRESS)

then when compiling you get a mystical error about the absence of a non-existent define in my code

lib/ESP32_Display_Panel/src/drivers/touch/esp_panel_touch.hpp:761:5: error: 'ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG_WITH_ADDR' was not declared in this scope;

When you specify a line like this:

(BusI2C::ControlPanelFullConfig)ESP_PANEL_TOUCH_I2C_CONTROL_PANEL_CONFIG(TOUCH_NAME)

Then the compilation moves on, and as I already said, it still gets stuck on ESP_PanelBus_QSPI.
As for the define of ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG_WITH_ADDR and why the library code can't find it and why is it trying to find it at all?
I have a few thoughts on this:

Previously, in version ESP32_Display_Panel @ 0.1.4, the following setup was used

https://github.com/esp-arduino-libs/ESP32_Display_Panel/blob/4c23160bddefe70be36d14fd3972834a45169c74/src/drivers/touch/port/esp_lcd_touch_cst816s.h#L47C9-L47C44

And all this was used in this form:

ESP_PanelBus_I2C *touch_bus = new ESP_PanelBus_I2C(TOUCH_PIN_NUM_I2C_SCL, TOUCH_PIN_NUM_I2C_SDA, ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG());

Why is this left in the new version of the library, if we configure the display via the esp_panel_drivers_conf.h file and specify there

#define ESP_PANEL_DRIVERS_TOUCH_USE_ALL (0)
#if !ESP_PANEL_DRIVERS_TOUCH_USE_ALL
#define ESP_PANEL_DRIVERS_TOUCH_USE_AXS15231B (0)
#define ESP_PANEL_DRIVERS_TOUCH_USE_CHSC6540 (0)
#define ESP_PANEL_DRIVERS_TOUCH_USE_CST816S (1)

Probably I downloaded an unstable version because the release says 1.0.3, but when I compile I see the version:

Dependency Graph
|-- ESP32_Display_Panel @ 1.0.4

In the old library I got the following dependencies when compiling:

Dependency Graph
|-- ESP32_IO_Expander @ 0.0.2
|-- ESP32_Display_Panel @ 0.1.4

Now they only get this:

Dependency Graph
|-- ESP32_Display_Panel @ 1.0.4

Maybe I didn't include the ESP32_IO_Expander library?

Answered by Lzw655

Aug 8, 2025

Ok, I saw that there is also the configQspiTransQueueDepth() API in v0.1.4. You can refer to the following modifications:

  ESP_PanelBus_QSPI *panel_bus = new ESP_PanelBus_QSPI(TFT_CS, TFT_SCK, TFT_SDA0, TFT_SDA1, TFT_SDA2, TFT_SDA3);
  panel_bus->configQspiFreqHz(TFT_SPI_FREQ_HZ);
  // Modification
  panel_bus->configQspiTransQueueDepth(1);
  panel_bus->begin();

View full answer

brightproject · 2025-08-06T11:26:24Z

brightproject
Aug 6, 2025
Author

Hello @Lzw655😀

I cleaned up the scr_st77916_new.h file from unnecessary stuff and shortened the display initialization lines so that there wouldn't be a huge canvas of code here:

#ifndef _SCR_ST77916_H_
#define _SCR_ST77916_H_

#include "pincfg.h"
#include <lvgl.h>

// includes ESP32_IO_Expander at once
#include <esp_display_panel.hpp>

using namespace esp_panel::drivers;

#define SCREEN_RES_HOR 280
#define SCREEN_RES_VER 280

// to shift the reduced screen away from the origin
#define RATIO  (360 - SCREEN_RES_HOR) / 2

extern int brightness;
static lv_color_t *disp_draw_buf = NULL;
static lv_color_t *buf1 = NULL;
static lv_color_t *buf2 = NULL;
static lv_disp_draw_buf_t draw_buf;
static lv_disp_drv_t disp_drv;
BacklightPWM_LEDC *backlight;
static ESP_PanelLcd *lcd = NULL;
Touch *touch = nullptr;

#define _EXAMPLE_TOUCH_CLASS(name, ...) Touch##name(__VA_ARGS__)
#define EXAMPLE_TOUCH_CLASS(name, ...)  _EXAMPLE_TOUCH_CLASS(name, ##__VA_ARGS__)

#define _EXAMPLE_LCD_CLASS(name, ...)   LCD_##name(__VA_ARGS__)
#define EXAMPLE_LCD_CLASS(name, ...)    _EXAMPLE_LCD_CLASS(name, ##__VA_ARGS__)
// new setup
uint32_t screenWidth;
uint32_t screenHeight;
uint32_t drawBufSize;

IRAM_ATTR bool onTouchInterruptCallback(void *user_data)
{
  return false;
}

IRAM_ATTR bool onLCD_DrawFinishCallback(void *user_data)
{
    esp_rom_printf("LCD draw finish callback\n");
    return false;
}

const esp_lcd_panel_vendor_init_cmd_t lcd_init_cmd[] = {
    {0xF0, (uint8_t[]){0x08}, 1, 0},
    {0xF2, (uint8_t[]){0x08}, 1, 0},
...
    {0x11, (uint8_t[]){0x00}, 1, 120},
    {0x29, (uint8_t[]){0x00}, 1, 0},
};

static void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
{
  ESP_PanelLcd *lcd = (ESP_PanelLcd *)disp->user_data;
  const int offsetx1 = area->x1;
  const int offsetx2 = area->x2;
  const int offsety1 = area->y1;
  const int offsety2 = area->y2;
  // lcd->drawBitmap(offsetx1, offsety1, offsetx2 - offsetx1 + 1, offsety2 - offsety1 + 1, (const uint8_t *)color_p);
  lcd->drawBitmap(offsetx1 + RATIO, offsety1 + RATIO, offsetx2 - offsetx1 + 1, offsety2 - offsety1 + 1, (const uint8_t *)color_p);
}

IRAM_ATTR bool onRefreshFinishCallback(void *user_data)
{
  lv_disp_drv_t *drv = (lv_disp_drv_t *)user_data;
  lv_disp_flush_ready(drv);
  return false;
}

void setRotation(uint8_t rot)
{
  if (rot > 3)
    return;
  if (lcd == NULL || touch == NULL)
    return;

  switch (rot)
  {
  case 1: // 顺时针90度
    lcd->swapXY(true);
    lcd->mirrorX(true);
    lcd->mirrorY(false);
    touch->swapXY(true);
    touch->mirrorX(true);
    touch->mirrorY(false);
    break;
  case 2:
    lcd->swapXY(false);
    lcd->mirrorX(true);
    lcd->mirrorY(true);
    touch->swapXY(false);
    touch->mirrorX(true);
    touch->mirrorY(true);
    break;
  case 3:
    lcd->swapXY(true);
    lcd->mirrorX(false);
    lcd->mirrorY(true);
    touch->swapXY(true);
    touch->mirrorX(false);
    touch->mirrorY(true);
    break;
  default:
    lcd->swapXY(false);
    lcd->mirrorX(false);
    lcd->mirrorY(false);
    touch->swapXY(false);
    touch->mirrorX(false);
    touch->mirrorY(false);
    break;
  }
}

void screen_switch(bool on)
{
  if (NULL == backlight)
    return;
  if (on)
    backlight->on();
  else
    backlight->off();
}

void set_brightness(uint8_t bri)
{
  if (NULL == backlight)
    return;
  backlight->setBrightness(bri);
}


static Touch *create_touch_without_config(void)
{
    BusI2C *bus = new BusI2C(
        TOUCH_PIN_NUM_I2C_SCL, TOUCH_PIN_NUM_I2C_SDA,
        (BusI2C::ControlPanelFullConfig)ESP_PANEL_TOUCH_I2C_CONTROL_PANEL_CONFIG(TOUCH_NAME)
        
        // mystical error with incomprehensible define
        // lib/ESP32_Display_Panel/src/drivers/touch/esp_panel_touch.hpp:761:5: error: 'ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG_WITH_ADDR' was not declared in this scope;
        // (BusI2C::ControlPanelFullConfig)ESP_PANEL_TOUCH_I2C_CONTROL_PANEL_CONFIG_WITH_ADDR(TOUCH_NAME, TOUCH_IO_I2C_CST816S_ADDRESS)

        // (BusI2C::ControlPanelFullConfig)ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG()
    );

    /**
     * Take GT911 as an example, the following is the actual code after macro expansion:
     *      TouchGT911(bus, 320, 240, 13, 14);
     */
    return new EXAMPLE_TOUCH_CLASS(
        TOUCH_NAME, bus, SCREEN_RES_HOR, SCREEN_RES_VER,
        TOUCH_PIN_NUM_RST, TOUCH_PIN_NUM_INT
    );
}

static LCD *create_lcd_without_config(void)
{
    BusQSPI *bus = new BusQSPI(
        TFT_CS, TFT_SCK,
        TFT_SDA0, TFT_SDA1, TFT_SDA2, TFT_SDA3
    );

    /**
     * Take `ST77922` as an example, the following is the actual code after macro expansion:
     *      LCD_ST77922(bus, 532, 300, 16, 3);
     */
    return new EXAMPLE_LCD_CLASS(
        LCD_NAME, bus, SCREEN_RES_HOR, SCREEN_RES_VER, LCD_COLOR_BITS, TFT_RST
    );
}

void scr_lvgl_init()
{
  ledc_timer_config_t ledc_timer = {
      .speed_mode = LEDC_LOW_SPEED_MODE,
      .duty_resolution = LEDC_TIMER_13_BIT,
      .timer_num = LEDC_TIMER_0,
      .freq_hz = 1000,
      // .freq_hz = 5000,
      .clk_cfg = LEDC_AUTO_CLK};
  ESP_ERROR_CHECK(ledc_timer_config(&ledc_timer));

  ledc_channel_config_t ledc_channel = {
      .gpio_num = (TFT_BLK),
      .speed_mode = LEDC_LOW_SPEED_MODE,
      .channel = LEDC_CHANNEL_0,
      .intr_type = LEDC_INTR_DISABLE,
      .timer_sel = LEDC_TIMER_0,
      .duty = 0,
      .hpoint = 0};

  ESP_ERROR_CHECK(ledc_channel_config(&ledc_channel));
  backlight = new BacklightPWM_LEDC(TFT_BLK, 50);
  backlight->begin();
  backlight->off();

touch = create_touch_without_config();
  auto lcd = create_lcd_without_config();
  
  /* Configure bus, lcd and touch before startup */
  auto bus1 = static_cast<BusI2C *>(touch->getBus());
  auto bus2 = static_cast<BusQSPI *>(lcd->getBus());

  bus1->configI2C_FreqHz(TOUCH_I2C_FREQ_HZ);
  bus1->configI2C_PullupEnable(TOUCH_I2C_SDA_PULLUP, TOUCH_I2C_SCL_PULLUP);
  touch->configResetActiveLevel(TOUCH_RST_ACTIVE_LEVEL);

  bus2->configQSPI_FreqHz(LCD_QSPI_FREQ_HZ);
  /* Startup the LCD and operate it */
  assert(touch->begin());
  // Attach a callback function which will be called when every bitmap drawing is completed
  lcd->attachDrawBitmapFinishCallback(onLCD_DrawFinishCallback);

  /* Startup the LCD and operate it */
  assert(lcd->begin());
  lcd->displayOn();
  screen_switch(true);

size_t lv_cache_rows = 72;
  // size_t lv_buffer_size = SCREEN_RES_HOR * SCREEN_RES_VER * sizeof(lv_color_t);
  size_t lv_buffer_size = SCREEN_RES_HOR * SCREEN_RES_VER;
  disp_draw_buf = (lv_color_t *)heap_caps_malloc(lv_cache_rows * SCREEN_RES_HOR * 2, MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
  // disp_draw_buf = (lv_color_t *)ps_malloc(lv_buffer_size);
  assert(disp_draw_buf);
  // buf1 = (lv_color_t *)ps_malloc(lv_buffer_size);
  buf1 = (lv_color_t *)heap_caps_malloc(lv_buffer_size, MALLOC_CAP_SPIRAM);
  assert(buf1);
  lv_init();
  lv_disp_draw_buf_init(&draw_buf, disp_draw_buf, buf1, SCREEN_RES_HOR * lv_cache_rows);
  // lv_disp_draw_buf_init(&draw_buf, disp_draw_buf, buf1, SCREEN_RES_HOR * SCREEN_RES_VER);

/*   // new setup
  drawBufSize = screenWidth * screenHeight;
  buf1= (lv_color_t*)heap_caps_malloc(drawBufSize, MALLOC_CAP_SPIRAM);
  assert(buf1);
  buf2 = (lv_color_t*)heap_caps_malloc(drawBufSize, MALLOC_CAP_SPIRAM);
  assert(buf2);

  lv_init();
  lv_disp_draw_buf_init(&draw_buf, buf1, buf2, SCREEN_RES_HOR * SCREEN_RES_VER); */

  lv_disp_drv_init(&disp_drv);
  disp_drv.hor_res = SCREEN_RES_HOR;
  disp_drv.ver_res = SCREEN_RES_VER;
  disp_drv.flush_cb = my_disp_flush;
  disp_drv.draw_buf = &draw_buf;
  disp_drv.user_data = (void *)lcd;
  lv_disp_t *disp = lv_disp_drv_register(&disp_drv);

/*   if (lcd->getBus()->getType() != ESP_PANEL_BUS_TYPE_SPI)
  // if (lcd->getBus()->getType() != ESP_PANEL_BUS_TYPE_RGB)
  {
    lcd->attachRefreshFinishCallback(onRefreshFinishCallback, (void *)disp->driver);
  } */
  // indev_touchpad = indev_init(touch);
}

#endif // _SCR_ST77916_H_

I managed to assemble this frankenstein-file, and as expected, it did not run on the device, giving the following errors to the serial port:

[I][Panel][esp_lcd_touch_cst816s.c:0045](esp_lcd_touch_new_i2c_cst816s): version: 1.0.3
E (2989) lcd_panel.io.i2c: panel_io_i2c_rx_buffer(140): i2c transaction failed
[E][Panel][esp_lcd_touch_cst816s.c:0185](read_id): read_id(185): I2C read failed
[E][Panel][esp_lcd_touch_cst816s.c:0092](esp_lcd_touch_new_i2c_cst816s): esp_lcd_touch_new_i2c_cst816s(92): Read version failed
[E][Panel][esp_lcd_touch_cst816s.c:0100](esp_lcd_touch_new_i2c_cst816s): Initialization failed!
[E][Panel][esp_panel_touch_cst816s.cpp:0036](begin): Create touch panel failed [ESP_FAIL]

assert failed: void scr_lvgl_init() scr_st77916_new.h:502 (touch->begin())

Could you help please with the code, I can't understand the repository examples with a lot of files here:

https://github.com/esp-arduino-libs/ESP32_Display_Panel/tree/master/examples/platformio/lvgl_v8_port/src

and

https://github.com/esp-arduino-libs/ESP32_Display_Panel/tree/master/examples/arduino/drivers/lcd/lcd_qspi
https://github.com/esp-arduino-libs/ESP32_Display_Panel/tree/master/examples/arduino/drivers/touch/touch_i2c

I collected the file scr_st77916_new.h code from these files😀

0 replies

Lzw655 · 2025-08-07T03:18:53Z

Lzw655
Aug 7, 2025
Maintainer

Hi @brightproject,

Regarding the error you initially encountered:

E (3347) lcd_panel.io.spi: panel_io_spi_tx_color(395): spi transmit (queue) color failed

This is caused by insufficient SRAM. Since the current SPI driver cannot directly transfer data on PSRAM through DMA, the SPI driver will default to applying for an SRAM of the same size and copying the data from PSRAM for transmission. Your lvgl buffer is allocated on PSRAM and is quite large, with a size of SCREEN_RES_HOR * SCREEN_RES_VER. Therefore, it is very likely that there is insufficient SRAM. This problem cannot be solved even by updating the version.

Solution:

Based on using the ESP32_Display_Panel v1 version, use bus2->configQSPI_TransQueueDepth(x); to reduce the transmission queue size, for example, x = 1.

Regarding the error you are encountering now:

[E][Panel]esp_lcd_touch_cst816s.c:0185: read_id(185): I2C read failed

This is because the current CST816 driver initialization will default to reading the ID, and some CST816 chips will fail to perform this operation.

Solution:

Comment out ESP_GOTO_ON_ERROR(read_id(cst816s), err, TAG, "Read version failed"); (link)

1 reply

brightproject Aug 7, 2025
Author

Solution:

Based on using the ESP32_Display_Panel v1 version, use bus2->configQSPI_TransQueueDepth(x); to reduce the transmission queue size, for example, x = 1.

Version 1 is not the version I used before - ESP32_Display_Panel @ 0.1.4?

Thank you for your response😀, I have temporarily abandoned the work on migration to ESP32_Display_Panel and decided to try to do it using LovyanGFX

https://forum.lvgl.io/t/error-lcd-panel-io-spi-panel-io-spi-tx-color-395-spi-transmit-queue-color-failed/21880

But not everything works there either, and although the image is output via DMA, it crumbles and breaks.
I am trying both freeRTOS and mutexes, but ESP32S3 reboots, so I still do not abandon the idea of staying working with ESP32_Display_Panel, because in version 0.1.4 my images on the display worked quite quickly.
Could you help me with the code of the scr_st77916_new.h file?😀

#ifndef _SCR_ST77916_H_
#define _SCR_ST77916_H_
...
#endif // _SCR_ST77916_H_

You understand better than me how to do this, because when I looked through the port file for lvgl 8, I realized that for the eighth version of lvgl it is impossible to use ESP32_Display_Panel, as it was before and as it worked before in the file scr_st77916.h
scr_st77916.zip

Lzw655 · 2025-08-08T05:46:43Z

Lzw655
Aug 8, 2025
Maintainer

Ok, I saw that there is also the configQspiTransQueueDepth() API in v0.1.4. You can refer to the following modifications:

  ESP_PanelBus_QSPI *panel_bus = new ESP_PanelBus_QSPI(TFT_CS, TFT_SCK, TFT_SDA0, TFT_SDA1, TFT_SDA2, TFT_SDA3);
  panel_bus->configQspiFreqHz(TFT_SPI_FREQ_HZ);
  // Modification
  panel_bus->configQspiTransQueueDepth(1);
  panel_bus->begin();

0 replies

brightproject · 2025-08-09T09:47:50Z

brightproject
Aug 9, 2025
Author

Ok, I saw that there is also the configQspiTransQueueDepth() API in v0.1.4. You can refer to the following modifications:

I tried this feature for version 0.1.4 and it did not bring positive results

Thank you for your participation😀

Unfortunately, at the moment I couldn't migrate to the latest version of ESP32_Display_Panel, I think I'll write a short description later on how to migrate from 0.1.4 to 1.0.3
By the way, where did version 1.0.4 come from?

https://github.com/esp-arduino-libs/ESP32_Display_Panel/blob/master/library.properties

For example, this code

ESP_PanelBus_QSPI *panel_bus = new ESP_PanelBus_QSPI(TFT_CS, TFT_SCK, TFT_SDA0, TFT_SDA1, TFT_SDA2, TFT_SDA3);

is replaced by

BusQSPI *bus = new BusQSPI(
TFT_CS, TFT_SCK,
TFT_SDA0, TFT_SDA1, TFT_SDA2, TFT_SDA3
);

And so on with the touch panel and backlight.
Currently, this is agony and pain.
I was able to fix the real problem that I encountered and described in this discussion.
Initially, lvgl 8, and perhaps version 9.3 takes up all the memory allocated to it and probably even more.
I had 98 kB, and this was not enough for the rest of the RTOS tasks.
Having reduced the memory allocated for lvgl 8 to

#define LV_MEM_SIZE (48U * 1024U)

I was able to run my widget without problems, and what's good is that it runs on version ESP32_Display_Panel @ 0.1.4

IMG_4553.MOV

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Help with migration to ESP32_Display_Panel Release v1.0.3 or 1.0.4 #231

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Help with migration to ESP32_Display_Panel Release v1.0.3 or 1.0.4 #231

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brightproject Aug 6, 2025

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brightproject Aug 6, 2025 Author

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Lzw655 Aug 7, 2025 Maintainer

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Lzw655 Aug 8, 2025 Maintainer

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brightproject Aug 9, 2025 Author

brightproject
Aug 6, 2025

Replies: 4 comments 1 reply

brightproject
Aug 6, 2025
Author

Lzw655
Aug 7, 2025
Maintainer

brightproject Aug 7, 2025
Author

Lzw655
Aug 8, 2025
Maintainer

brightproject
Aug 9, 2025
Author