Multible 1,3 IPS TFT SPI Displays ST7789 on a Arduino Nano

Using Arduino Displays
1

Hello community,

is it possible to connect multible (actual 6 displays) to one arduino nano? How to wire it and how to control it?

my test does not work. i tried it with tft and adafruit library.

i connected all displays
arduino gnd -> tft gnd
arduino 3,3v -> tft vcc
arduino pin13 -> tft SCL
arduino pin11 -> tft SDA
arduino pin2 -> tft RES
ardiono pin3 -> tft1 DC
ardiono pin4 -> tft2 DC
ardiono pin5 -> tft3 DC
ardiono pin6 -> tft4 DC
ardiono pin7 -> tft5 DC
ardiono pin8 -> tft6 DC

i tried the code also the adafruit code:

#include <SPI.h>             // Arduino SPI library
#include <TFT.h>
 
TFT myScreen1 = TFT(10, 3, 2);
 
void setup(void) {
  myScreen1.begin();
  myScreen1.background(0, 0, 0);
  myScreen1.stroke(255,255,255);
  myScreen1.setTextSize(2);
  myScreen1.text("Sensor Value : ",0,0);
  myScreen1.setTextSize(5);
}
 
void loop() {
  myScreen1.stroke(255,255,255);
  myScreen1.text("TFT1", 0, 20);
  delay(250);
}

Images from the diaplsy:

2

Go on. There is no CS pin. So you can have six displays all showing the same thing.

David.

3

Hello David,

that mean, i need a CS-Pin on each control to communicate with all six display seperate?

greetings
pepe

4

Yes.

The bare module has CS on the ribbon.

It is a mystery why anyone would make an SPI board without CS pins.
It means that you can't have anything else on the SPI bus.

Although you can read some registers (with care) you can't read the GRAM memory without a CS pin.
At least, I have never succeeded.

David.