Cannot get GT911 touch to work.

[lucasmontec]

Hey! I hope you can help, I already spent 4h+ on this. Recently I bought this ESP32 module. This is using a TFT hooked on the hardware SPI and a capacitive touch panel controlled by a GT911. I'm trying to hook up your library and cannot ever get the touch controller to work.

The hardware connections are:

I'm using this setup:

lgfx::Panel_ST7796      _panel_instance;
lgfx::Bus_SPI       _bus_instance; 
lgfx::Light_PWM     _light_instance;
lgfx::Touch_GT911            _touch_instance;

auto cfg = _bus_instance.config(); 

// SPI (display is working)
      cfg.spi_host = HSPI_HOST;     // This display is hooked into HSPI (GPIO 13,12,14,15)
      // ESP-IDF VSPI_HOST , HSPI_HOST SPI2_HOST , SPI3_HOST
      cfg.spi_mode = 0;             // SPI (0 ~ 3)
      cfg.freq_write = 55000000;    // SPI (80MHz, 80MHz)
      cfg.freq_read  = 20000000;    // SPI
      cfg.spi_3wire  = false;        // MOSI true
      cfg.use_lock   = true;        // true
      cfg.dma_channel = 1; // DMA / 1=1ch / 2=ch / SPI_DMA_CH_AUTO=)
      // ESP-IDF DMA SPI_DMA_CH_AUTO 1ch,2ch
      cfg.pin_sclk = 14;            // SPI SCLK
      cfg.pin_mosi = 13;            // SPI MOSI
      cfg.pin_miso = 12;            // SPI MISO (-1 = disable)
      cfg.pin_dc   = 2;            // SPI D/C (-1 = disable)
     // SD SPI

      _bus_instance.config(cfg);  
      _panel_instance.setBus(&_bus_instance);    

 auto cfg = _panel_instance.config();

      cfg.pin_cs           =    15;  // CS   (-1 = disable)
      cfg.pin_rst          =    2;   // RST  (-1 = disable)
      cfg.pin_busy         =    -1;  // BUSY (-1 = disable)

      cfg.panel_width      =   320;
      cfg.panel_height     =   480;
      cfg.offset_x         =     0;  
      cfg.offset_y         =     0;  
      cfg.offset_rotation  =     0;  // 0~7 (4~7)
      cfg.dummy_read_pixel =     8; 
      cfg.dummy_read_bits  =     1;  
      cfg.readable         =  true;  // true
      cfg.invert           = false;  // true
      cfg.rgb_order        = false;  // true
      cfg.dlen_16bit       = false;  // 16bit SPI true
      cfg.bus_shared       =  true;  // SD true(drawJpgFile)

      _panel_instance.config(cfg);

//----------------------------TOUCH <<< This is what is not working
auto cfg = _touch_instance.config();

      cfg.x_min      = 0;    // Minimum X value (raw value) obtained from touch screen
      cfg.x_max      = 319;  // Maximum X value (raw value) obtained from the touch screen
      cfg.y_min      = 0;    // Minimum Y value (raw value) obtained from touch screen
      cfg.y_max      = 479;  // Maximum Y value (raw value) obtained from the touch screen

      cfg.bus_shared = false; // Set to true if you are using the same bus as the screen
      cfg.offset_rotation = 0;// Adjustment when the display and touch orientation do not match Set with a value from 0 to 7

      cfg.pin_rst    = 25;
      cfg.pin_int    = 21;   // Pin number to which INT is connected

      cfg.i2c_port = 1;      // I2C(0 or 1) Must be 1 to use Wire library not Wire1 (I tested with Wire and it read)
      cfg.i2c_addr = GT911_ADDR1;   // I2C I tested the GT911_ADDR1 which is (uint8_t)0x5D using TAMC_GT911 and got touches
      cfg.pin_sda  = 33;     // SDA correct
      cfg.pin_scl  = 32;     // SCL correct
      cfg.freq = 400000;     // I2C from the example

      _touch_instance.config(cfg);
      _panel_instance.setTouch(&_touch_instance); 

I even looked into your code and got this to spit a 'true':

  result = lgfx::i2c::init(1, 33, 32).has_value();
  Serial.print("Init port 1:");
  Serial.println(result); //prints 1

This line: _inited = lgfx::i2c::init(_cfg.i2c_port, _cfg.pin_sda, _cfg.pin_scl).has_value() && _writeBytes(gt911cmd_getdata, 3); The _writeBytes(gt911cmd_getdata, 3); part returns 0 or it seems to return 0.

[lovyan03]

Sorry, there is not enough information, please use the Issue template and fill in the required fields

https://github.com/lovyan03/LovyanGFX/issues/new?assignees=&labels=&template=bug-report--------.md&title=

Please provide the smallest, buildable, code that can reproduce the phenomenon. Code with only the configuration part will not allow me to test under the same conditions.

[lovyan03]

And, if possible, try to get it from the develop branch. Issues that are not resolved in the release version may be resolved in the develop branch.

[lucasmontec]

Environment ( 実行環境 )

• MCU or Board name: ESP32 (ESP32-3248SO35)
• Panel Driver IC: ST7796
• Bus type: SPI (TFT) & I2C (touch)
• LovyanGFX version: v0.4.18
• FrameWork version: ArduinoESP32 v2.0.3
• Build Environment : ArduinoIDE
• Operating System: Windows

Problem Description ( 問題の内容 )

Touch is not working with the GT911 module. Using the user setup example I cannot get the touch to read anything and calibration doesn't sense no touches.

Expected Behavior ( 期待される動作 )

Touch working.

Actual Behavior ( 実際の動作 )

Clicking the screen doesn't do anything.

Steps to reproduce ( 再現のための前提条件 )

Upload code to the board, try clicking anywhere.

The wiring is from the factory as follows:

Code to reproduce this issue ( 再現させるためのコード )

(https://gist.github.com/lucasmontec/0a29ce962ee3bac458b191ec16b4266f)

[lovyan03]

@lucasmontec Thanks for the detailed information.

I got this information about ESP32-3248SO35 from an acquaintance, please try the following. When CPU is 240MHz, INT GPIO21 does not function properly, so specify -1 for INT. If you set CPU 160MHz, INT GPIO21 works.

[lucasmontec]

I'll try it as soon as possible and answer here. Just needed to add that I was able to work with LVGL and the TAMC GT911, so that GPIO21 should be working just fine.

[rzeldent]

Hi Lucas,

I do have the same board and have pin 21 set to -1. I got it working and quickly, as a test adapted the Tetris game from the examples: https://github.com/rzeldent/ESP32-3248S035-Tetris. In this version, the pin21 is set to -1 and it "works". Little detail, it works after a hard reset. If it has been uploaded it does not work.

However, I also made an integration with lvgl and here I really cannot get the GT911 using LovyanGFX @ ^0.4.18 to work, Even with the INT pin set to -1. See the code below; the getTouch function never returns a value >0. It looks like the GT911 implementation is not very stable/timing?

void lvgl_touchpad_read(lv_indev_drv_t *indev_driver, lv_indev_data_t *data)
{
    uint16_t touchX, touchY;
    // Ignore multi-touch
    if (tft.getTouch(&touchX, &touchY))
    {
        log_d("Touch: (%d,%d)", touchX, touchY);
        data->state = LV_INDEV_STATE_PR;
        data->point.x = touchX;
        data->point.y = touchY;
    }
    else
        data->state = LV_INDEV_STATE_REL;
}

I have it working the TAMC GT911 driver and TFT_eSPI and this is working with lvgl. I ordered some resistive touch boards to see it this works.

Please let me know if you make any progress because this is also an impediment for me. Also, some more information about this board can be found at: https://macsbug.wordpress.com/2022/10/02/esp32-3248s035

[lucasmontec]

Yeahh! I actually did the same thing! I'm using TAMC GT911 and LVGL for this. The issue is, Lovyan is faster and has a better API than LVGL... I think the resistive touch probably works.

[rzeldent]

I hope the resistive touch works better, most of the examples are with the 3238S036R (R = probably resistive) with the XPT2046. A few with the GT911 but code seems a bit hacked in the examples for the board. However, I'd prefer capacitive. Also, using LovyanGFX is interetsing because it looks less heavy and seems to perform better. The best option would, to use only the drivers. LVGL contains all the drawing stuff/fonts etc and is this is not needed from Lovyan or TFT_eSPI. I tried https://github.com/lvgl/lvgl_esp32_drivers but this is not up to date for lvgl 8 and did not get it to work... Maybe you did? What now?

[lucasmontec]

Im working with the latest lvgl and TAMC GT911 with success. I don't think this thread is the correct place to talk about other libraries so feel free to add me on discord Zumbi#2535 or drop me an email lucas.mcarvalhaes@gmail.com

[Zer0-bit]

@lovyan03 Hello and thank you for all your hard work!

I'll gladly create a separate issue if this is what's best but seeing how it's the same panel and driver i thought there's no need.

I have the same issue using the pre-defined user settings from the develop branch https://github.com/lovyan03/LovyanGFX/blob/develop/src/lgfx_user/LGFX_ESP32S3_RGB_ESP32-8048S043.h

I'm actually using the 4.3" IPS(800x480) screen this header is targeting and if i flash the provided calibration example including the above header i just end up seeing the drawing screen without being able to draw as no touch, the calibration phase is skipped which tells me it doesn't seem to detect any touch panel ? I know the work on that header is in progress still but not sure whether in your tests it works and doesn't in mine ?

[tobozo]

@Zer0-bit those predefined user settings are templates, have you tried to import the code into your sketch and use a different pinout?

@lucasmontec feel free to create a discussion in the Q&A section

[Zer0-bit]

@Zer0-bit those predefined user settings are templates, have you tried to import the code into your sketch and use a different pinout?

But the pinout is exactly the same as specified there, i mean i'm using the exact model the template was created for unless i'm missing smth reading that ofc?

[tobozo]

@Zer0-bit do you mean you're also using an ESP32-8048S043? Have you tried the suggested workarounds? Looks like you're expecting some kind of commercial support, but this is a community site :wink:

Please make your own research and provide the results before asking for support from the community.

[Zer0-bit]

@Zer0-bit do you mean you're also using an ESP32-8048S043? Have you tried the suggested workarounds? Looks like you're expecting some kind of commercial support, but this is a community site 😉

Please make your own research and provide the results before asking for support from the community.

Lol i mean i've not been trying to be perceived as trying to get commercial level support tbh not even sure what in my sentence sparked this thought, i was just trying to understand whether the screen's touch has been working at all in testing since is saw a template in the user settings that was targeting this exact model ( yes i have ESP32-8048S043 ). I'm atm on my 4th day of trying to get this thing working so did quite a bit of research and tried all the workarounds i was able to find(including in this thread) prior to posting, i mean i'm running my own OOS project so i know how absurd some issues or requests can get, pls hold fire lol.

Btw this is the header i've been using, if anyone has any idea pls kindly let me know i'm kinda out of ideas for now :(

#include <lgfx/v1/platforms/esp32s3/Panel_RGB.hpp>
#include <lgfx/v1/platforms/esp32s3/Bus_RGB.hpp>

class LGFX : public lgfx::LGFX_Device{
  lgfx::Bus_RGB     _bus_instance;
  lgfx::Panel_RGB   _panel_instance;
  lgfx::Light_PWM   _light_instance;
  lgfx::Touch_GT911 _touch_instance;

public:LGFX(void){
  auto cfg    = _bus_instance.config();
  cfg.panel   = &_panel_instance;
  cfg.pin_d0  = 8;  // B0
  cfg.pin_d1  = 3;  // B1
  cfg.pin_d2  = 46; // B2
  cfg.pin_d3  = 9;  // B3
  cfg.pin_d4  = 1;  // B4
  cfg.pin_d5  = 5;  // G0
  cfg.pin_d6  = 6;  // G1
  cfg.pin_d7  = 7;  // G2
  cfg.pin_d8  = 15; // G3
  cfg.pin_d9  = 16; // G4
  cfg.pin_d10 = 4;  // G5
  cfg.pin_d11 = 45; // R0
  cfg.pin_d12 = 48; // R1
  cfg.pin_d13 = 47; // R2
  cfg.pin_d14 = 21; // R3
  cfg.pin_d15 = 14; // R4
  cfg.pin_henable       = 40;
  cfg.pin_vsync         = 41;
  cfg.pin_hsync         = 39;
  cfg.pin_pclk          = 42;
  cfg.freq_write        = 16000000;
  cfg.hsync_polarity    = 0;
  cfg.hsync_front_porch = 8;
  cfg.hsync_pulse_width = 4;
  cfg.hsync_back_porch  = 16;
  cfg.vsync_polarity    = 0;
  cfg.vsync_front_porch = 4;
  cfg.vsync_pulse_width = 4;
  cfg.vsync_back_porch  = 4;
  cfg.pclk_idle_high    = 1;
  _bus_instance.config(cfg);
  _panel_instance.setBus(&_bus_instance);

  { auto cfg = _panel_instance.config();
  cfg.memory_width  = 800;
  cfg.memory_height = 480;
  cfg.panel_width   = 800;
  cfg.panel_height  = 480;
  cfg.offset_x      = 0;
  cfg.offset_y      = 0;
  _panel_instance.config(cfg);
  }

  { auto cfg = _panel_instance.config_detail();
  cfg.use_psram = 1;
  _panel_instance.config_detail(cfg);
  }

  { auto cfg = _light_instance.config();
  cfg.pin_bl = 2;
  _light_instance.config(cfg);
  }
  _panel_instance.light(&_light_instance);

  { auto cfg = _touch_instance.config();
  cfg.x_min      = 0;      // タッチスクリーンから得られる最小のX値(生の値)
  cfg.x_max      = 800;    // タッチスクリーンから得られる最大のX値(生の値)
  cfg.y_min      = 0;      // タッチスクリーンから得られる最小のY値(生の値)
  cfg.y_max      = 480;    // タッチスクリーンから得られる最大のY値(生の値)
  cfg.pin_int    = 18;     // INTが接続されているピン番号 18
  cfg.bus_shared = false;  // 画面と共通のバスを使用している場合 trueを設定
  cfg.offset_rotation = 0; // 表示とタッチの向きの調整 0~7の値で設定
  // I2C接続
  cfg.i2c_port   = 1;      // 使用するI2Cを選択 (0 or 1)
  cfg.pin_sda    = 19;     // SDAが接続されているピン番号
  cfg.pin_scl    = 20;     // SCLが接続されているピン番号
  cfg.freq       = 400000; // I2Cクロックを設定
  cfg.i2c_addr   = 0x14;   // I2Cデバイスアドレス番号 or 0x5D , 0x14
  _touch_instance.config(cfg);
  _panel_instance.setTouch(&_touch_instance);//タッチスクリーンをパネルにセット
  }

  setPanel(&_panel_instance); // 使用するパネルをセットします。
  }
};

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[rzeldent]

Hi Simone,

Thanks for reviving this thread. I had lots of trouble getting it to work with Lovyan so started a github repo just for these boards for LVGL. Besides the display it also covers the led, light sensor etc... esp32-smartdisplay Maybe this works also for you...

[simonegalizzi]

  { // Set the touch screen control. 
      auto cfg = _touch_instance.config();
      cfg.x_min      = 0;    
      cfg.x_max      = 320;
      cfg.y_min      = 0;
      cfg.y_max      = 480;
      cfg.pin_int    = -1;
      cfg.pin_rst    = 25;
      cfg.bus_shared = false; 
      cfg.offset_rotation = 0;
      cfg.i2c_port = 0;     
      cfg.i2c_addr = 0x5D;  
      cfg.pin_sda  = 33;    
      cfg.pin_scl  = 32;    
      cfg.freq = 1000000;     

      _touch_instance.config(cfg);
      _panel_instance.setTouch(&_touch_instance); 
    }  

This works for me with LoryvanGFX