Touchscreen on CrowPanel 7inch v3.0 not working

RCRoeder

Winny,
how do i send you the code? I have not recieved an email from you yet.

Winny

@RCRoeder said:
Winny,
how do i send you the code? I have not recieved an email from you yet.

Hi,
You can try modify the following sentence in the sample code I sent.

And please remember to check the psram setting is correct.

If it still not working, please contact us at techsupport@elecrow.com

RCRoeder

one thing i have noticed is the gfx_conf.h file references lgfx::Touch_GT911 _touch_instance, but if we are now using PCA9557 is this a conflict? Still have no touch. I was told i should send my code to you, and i would be contacted. No contact so i am postingthe code here.

// esp32 by Expressif Systems 2.9.15
// Arduino ESP32 Boards by Arduino 20.0.13
// LovyanGFX by Lovyan03 1.1.12
// lvgl by kisvegabor 8.3.11
// PCA9557

// PSRAM; opi psram
// Partition Scheme: Huge App

#include <Wire.h>
#include <SPI.h>
#include <PCA9557.h>

#include <lvgl.h>
 #include "ui.h"
/**************************LVGL and UI END************************/

/*******************************************************************************
   Config the display panel and touch panel in gfx_conf.h
 ******************************************************************************/
#include "gfx_conf.h"

static lv_disp_draw_buf_t draw_buf;
static lv_color_t disp_draw_buf1[screenWidth * screenHeight / 10];
static lv_color_t disp_draw_buf2[screenWidth * screenHeight / 10];
static lv_disp_drv_t disp_drv;

PCA9557 Out;    //for touch timing init

/* Display flushing */
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.pushImageDMA(area->x1, area->y1, w, h,(lgfx::rgb565_t*)&color_p->full);

   lv_disp_flush_ready( disp );

}

void my_touchpad_read(lv_indev_drv_t *indev_driver, lv_indev_data_t *data)
{
   uint16_t touchX, touchY;
   bool touched = tft.getTouch( &touchX, &touchY);
   if( !touched )
   {
      data->state = LV_INDEV_STATE_REL;
   }
   else
   {
      data->state = LV_INDEV_STATE_PR;

      /*Set the coordinates*/
      data->point.x = touchX;
      data->point.y = touchY;

      Serial.print( "Data x " );
      Serial.println( touchX );

      Serial.print( "Data y " );
      Serial.println( touchY );
   }
}


void setup()
{
  Serial.begin(9600);
  Serial.println("LVGL Widgets Demo");

  //GPIO init
#if defined (CrowPanel_50) || defined (CrowPanel_70)
  pinMode(38, OUTPUT);
  digitalWrite(38, LOW);
  pinMode(17, OUTPUT);
  digitalWrite(17, LOW);
  pinMode(18, OUTPUT);
  digitalWrite(18, LOW);
  pinMode(42, OUTPUT);
  digitalWrite(42, LOW);

  //touch timing init
  Wire.begin(19, 20);
  Out.reset();
  Out.setMode(IO_OUTPUT);
  Out.setState(IO0, IO_LOW);
  Out.setState(IO1, IO_LOW);
  delay(20);
  Out.setState(IO0, IO_HIGH);
  delay(100);
  Out.setMode(IO1, IO_INPUT);

#elif defined (CrowPanel_43)
  pinMode(20, OUTPUT);
  digitalWrite(20, LOW);
  pinMode(19, OUTPUT);
  digitalWrite(19, LOW);
  pinMode(35, OUTPUT);
  digitalWrite(35, LOW);
  pinMode(38, OUTPUT);
  digitalWrite(38, LOW);
  pinMode(0, OUTPUT);//TOUCH-CS
#endif

  //Display Prepare
  tft.begin();
  tft.fillScreen(TFT_BLACK);
  tft.setTextSize(2);
  delay(200);

  lv_init();

  delay(100);

  lv_disp_draw_buf_init(&draw_buf, disp_draw_buf1, disp_draw_buf2, screenWidth * screenHeight/10);
  /* Initialize the display */
  lv_disp_drv_init(&disp_drv);
  /* Change the following line to your display resolution */
  disp_drv.hor_res = screenWidth;
  disp_drv.ver_res = screenHeight;
  disp_drv.flush_cb = my_disp_flush;
  disp_drv.full_refresh = 1;
  disp_drv.draw_buf = &draw_buf;
  lv_disp_drv_register(&disp_drv);

  /* Initialize the (dummy) input device driver */
  static lv_indev_drv_t indev_drv;
  lv_indev_drv_init(&indev_drv);
  indev_drv.type = LV_INDEV_TYPE_POINTER;
  indev_drv.read_cb = my_touchpad_read;
  lv_indev_drv_register(&indev_drv);

  tft.fillScreen(TFT_BLACK);

  ui_init();

  Serial.println( "Setup done" );

}

void loop()
{
    lv_timer_handler();
    delay(5);
}

andresloewen2

I have the same problem, any updates????

dd2_42

Facing the same issue. Tried all of the above, still not working, any update on this team?

Bhagya

The 7-inch CROW Panel display is not detecting touch. I have tried the above solutions, but the issue persists. Initially, the touch functionality worked correctly when powered on, and the LVGL demo test example was displayed. However, after testing the demo lesson, the touch functionality stopped working. Everything else, including code uploading, works properly without any errors. Please give update on this.

lylebaker

I have the same issue. Running lesson 4 on the 7" screen, the touch interface returns nothing. Schematic shows an address of 0x18, but the code is configured 0x14. I tried both and nothing received from the drivers. Either the code/librarys are really bad or my hardware is bad. No idea which but I'm not very satisfied with this product.

lylebaker

I figured out what my issue is. The I2C frequency is too fast. With the initial 400000 setting the screen will not work at all. I never get any touch information returned. I dropped the freq to 300000 and now the paint demo works as it should. Not sure if the hardware specs of the part changed or what, but the settings in the example do not work!

        cfg.i2c_port   = I2C_NUM_1;
        cfg.pin_sda    = GPIO_NUM_19;
        cfg.pin_scl    = GPIO_NUM_20;
        //cfg.freq       = 400000;
        cfg.freq       = 300000;
        cfg.i2c_addr   = 0x14;