Problem with display

Other Hardware Displays
1

Hello, I have been trying to display plain text on my screen for a long time, but I have encountered several problems.

My display: https://a.aliexpress.com/_Eyq6ZJb st7789 with touch

my arduino: uno r3 dip atmega328p u

pins: VCC-5v, GND-GND, CS-10, RESET-9, DC-8, SDI(MOSI)-11, SCK-13, LED-3.3v, SDO(MISO)-12

my code:

#include <Adafruit_GFX.h>
#include <Adafruit_ST7789.h>
#include <SPI.h>

#define TFT_CS    10
#define TFT_RST    9
#define TFT_DC     8
#define TFT_SDI   11
#define TFT_SCK   13

Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);

void setup(void) {
  tft.init(240, 320);
  tft.setRotation(1);

  tft.fillScreen(ST77XX_BLACK);

  tft.setCursor(10, 50);
  tft.setTextSize(2);
  tft.setTextColor(ST77XX_WHITE);
  tft.println("Hello, World!");
}

void loop() {
}

after clicking the reset button on the Araduino, nothing happens, only when I touch the Arduino with my fingers and "ground" it, after clicking the reset, the "hello world" inscription appears for the duration of the LED flashing and after a while it goes out. the background in the program is set to black and the screen is white (the text is also black instead of white).

I will be very glad for help, thanks :slight_smile:

2

When touching a circuit changes it's behaviour, the problem is most likely an intermittent connection, weak solder joint, or other mechanical deficiency.