TFT_eSPI Setup for ST7789P3 2.25" 76x284 TFT

Other Hardware Displays
1

Hello one and all,
I need some help configuring the latest version TFT_eSPI library for ST7789P3, 2.25 inch 76x284 TFT display.

I'm assuming that I can use Mr Bodmer's library as it's nearly working and I have had good experience in the past with other displays. In this case the obvious issues are the x and y offsets are off and colours are reversed but I don't know how to correct either of these properties in platformio.ini.
The display is used with the ESP8266, which I would like the display to operate with width as 284 and height as 76.

Any help or hints would be most welcome as I've all but run out of tinkering ideas.

Here are a couple of photos of the display (purchased here):

20250925_092528
20250925_092528800×1066 65.5 KB

20250925_092417
20250925_092417800×600 36.3 KB

I'm using PlatformIO with the following platformio.ini settings:

; https://docs.platformio.org/page/projectconf.html

[platformio]
data_dir = app

; Actual board used is esp12f
[env:esp12e]
board = esp12e
framework = arduino
; platform = espressif8266
platform = espressif8266@4.2.1 ; force a recent version but still uses spiffs!
board_build.filesystem = littlefs ; spiffs is deprecated but still uses spiffs!
build_type = debug
monitor_filters = esp8266_exception_decoder

build_flags =
	-D USER_SETUP_LOADED=1 ; Prevent loading default User_Setup files
	-D ST7789_DRIVER=1
        -D TFT_WIDTH=284
        -D TFT_HEIGHT=76
	-D CGRAM_OFFSET

	-D TFT_MISO=-1 ; Define MISO pin (or -1 if not used)
	-D TFT_MOSI=13 ; Define MOSI pin
	-D TFT_SCLK=14 ; Define SCK pin
	-D TFT_CS=15 ; Define Chip Select pin
	-D TFT_DC=5 ; Define Data/Command pin
	-D TFT_RST=-1 ; Define Reset pin (or -1 if connected to ESP8266 RST)
	-D SPI_FREQUENCY=27000000 ; Define SPI clock frequency
	-D LOAD_GLCD=1
	-D LOAD_FONT2=1
  -D LOAD_FONT4=1
  -D LOAD_FONT6=1
  -D LOAD_FONT7=1
  -D LOAD_FONT8=1
  -D LOAD_GFXFF=1
  -D SMOOTH_FONT=1

monitor_speed = 115200
upload_speed = 921600
monitor_port = COM3
upload_port = COM3
lib_extra_dirs = ../SharedLib

; [env:d1_mini_ota]
; extends = env:esp12e
; upload_protocol = espota
; upload_port = 192.168.1.152

Here is the setup code:

#include <Arduino.h>
#include <TFT_eSPI.h> // Hardware-specific library
#include <SPI.h>

// ESP8266 Pin Assignement
// Recommended connections for the ESP8266's built-in SPI pins
#define SCLK 14
#define MOSI 13
#define CS 15
#define DC 5
#define RESET 4
#define FLASH_PIN 0 // Use as input pin
#define LED_PIN 2		// esp12f module on board LED
#define BL_PIN 16		// Display Backlight

TFT_eSPI tft = TFT_eSPI(); // Invoke library

setup()
{
	Serial.begin(115200);
	while (!Serial)
		;

	// use the built in button
	pinMode(FLASH_PIN, INPUT_PULLUP);
	pinMode(LED_PIN, OUTPUT);
	pinMode(BL_PIN, OUTPUT);
	digitalWrite(LED_PIN, false); // off

	tft.init();
	tft.setRotation(1); // rotate the screen orientation m = 0-3 or 4-7 for BMP drawing
	tft.fillScreen(TFT_WHITE); // (colours are reversed)
	tft.setCursor(0, 0, 2);
	tft.setTextFont(4);
	tft.setTextColor(TFT_BLACK);; // (colours are reversed)
	tft.println("Hello Piglet!");
	tft.println("H1ello Piglet!");
	tft.println("H2ello Piglet!");
	digitalWrite(BL_PIN, 0); // on
}
2

Swap width & height because they are defined for portrait mode for the 7789.
Then "play" with the screen rotation.

From User_setup.h

// For ST7789, ST7735, ILI9163 and GC9A01 ONLY, define the pixel width and height in portrait orientation

3

Thanks for your suggestions Max. I have played around with the platformio.ini height and width along with the code setup() rotations of 0-3 but was unable to arrive at the desired result. I'm unclear what the User_setup.h quote means, does it imply it can't achieved in the platformio.ini?

When reversing width and height in `platformio.ini``:

-D TFT_WIDTH=76
-D TFT_HEIGHT=284
; -D CGRAM_OFFSET

Display shows only coloured 'snow' - with all tft.setRotation(0 ... 3) arguments 0 to 3 and with or without CGRAM_OFFSET.

Changing back to the original

    -D TFT_WIDTH=284
    -D TFT_HEIGHT=76
	-D CGRAM_OFFSET

Is the only way I can see at least some semblance of text. Rotations of 1 and 3 both display text length-ways on the display, which is what I want to achieve but text is still offset and wrapping at a reduced width.

It feels like there is something more fundamental.

The case is still open!

4

I have a screen with the 7789 that I set from platformio but unfortunately it is 240x240. :man_facepalming:

I have no way to test by changing the parameters

5

The ST7789_Defines driver doesn't have your display settings; you need to add them there.

6

Um, doesn't the following platformio.ini setting effectively create a new setup?

build_flags =
  -D USER_SETUP_LOADED=1 ; Prevent loading default User_Setup files
  ... height and width, etc
7

No stress Max, the solution will come with persistence. Really appreciate your input.

1 Like
8

Open the file that I marked and see how it is arranged and what the system sets in the settings if your display is not included in the prescribed ones

9

Looking in files:

TFT_eSPI\User_Setups\Setup24_ST7789.h,
TFT_eSPI\User_Setup_Select.h
TFT_eSPI\TFT_Drivers\ST7789_Defines.h

I only see the following customisation properties, but as you see I have tinkered with them all in combination with the setup() orientation code.

TFT_HEIGHT
TFT_WIDTH
CGRAM_OFFSET

I don't know what I'm doing sufficiently so I haven't changed any of the "ST7789 specific commands" or "Generic commands used by TFT_eSPI.cpp".

What am I missing?

10

If your display is not defined, it will be set

   else if(_init_width == 170)
      {
        colstart = 35;
        rowstart = 0;
      }
      else
      {
        colstart = 0;
        rowstart = 0;
      }
#endif
11

Hello Victor and thank you for your comments.

So that I'm clear and I'm understanding you.
Are you saying that changing x,y offsets is not possible within the platformio.ini. But instead to change offsets by following these steps:

  1. Make a new entry in TFT_eSPI\TFT_Drivers\ST7789_Defines.h.
  2. Make a new entry in TFT_eSPI\User_Setup_Select.h.
  3. Make new entries in TFT_eSPI\TFT_Drivers\ST7789_Rotation.h and TFT_eSPI\TFT_Drivers\ST7789_2_Rotation.h with experimental offsets for my display.

Is that correct?

12

Almost right!
Yes, I did that for new controllers that aren't in the library. In your case, just adding the new display to the existing files is enough. I've already done this in two files, but on a different computer. I can post the code for these two modified files so I can check if I made the changes correctly. If not, I can adjust them.

1 Like
13

A working solution for this display is below, thanks to ua6em and my own tinkering. It should be further improved to prevent a library upgrade from overwriting the library file changes below.
Since I could not find a way of customising x, y offsets from platformio.ini I dropped doing it that way in favour of User_Setup.h.

\TFT_Drivers\ST7789_Defines.h

// ALI ST7789P3 2.25 TFT support (always use offset)
#if (TFT_HEIGHT == 284) && (TFT_WIDTH == 76)
  #ifndef CGRAM_OFFSET
    #define CGRAM_OFFSET
  #endif
#endif

ST7789_Rotation.h additional switch case:
Added custom offsets here because I didn't come across a more custom display friendly way.
Please comment if you know better.

...
// you need to add case's for 0 and 2 if needed with your own x,y values.
case 1: // Landscape (Portrait + 90)
	else if (_init_width == 76)
	{
		colstart = 18;
		rowstart = 82;
	}

case 3: // Inverted landscape
else if (_init_width == 76)
{
	colstart = 18;
	rowstart = 82;
}

TFT_eSPI\User_Setup.h

//                            USER DEFINED SETTINGS
//   Set driver type, fonts to be loaded, pins used and SPI control method etc.
//
//   See the User_Setup_Select.h file if you wish to be able to define multiple
//   setups and then easily select which setup file is used by the compiler.
//
//   If this file is edited correctly then all the library example sketches should
//   run without the need to make any more changes for a particular hardware setup!
//   Note that some sketches are designed for a particular TFT pixel width/height

// User defined information reported by "Read_User_Setup" test & diagnostics example
#define USER_SETUP_INFO "User_Setup"

// Define to disable all #warnings in library (can be put in User_Setup_Select.h)
//#define DISABLE_ALL_LIBRARY_WARNINGS

// ##################################################################################
//
// Section 1. Call up the right driver file and any options for it
//
// ##################################################################################

// Define STM32 to invoke optimised processor support (only for STM32)
//#define STM32

// Defining the STM32 board allows the library to optimise the performance
// for UNO compatible "MCUfriend" style shields
//#define NUCLEO_64_TFT
//#define NUCLEO_144_TFT

// STM32 8-bit parallel only:
// If STN32 Port A or B pins 0-7 are used for 8-bit parallel data bus bits 0-7
// then this will improve rendering performance by a factor of ~8x
//#define STM_PORTA_DATA_BUS
//#define STM_PORTB_DATA_BUS

// Tell the library to use parallel mode (otherwise SPI is assumed)
//#define TFT_PARALLEL_8_BIT
//#defined TFT_PARALLEL_16_BIT // **** 16-bit parallel ONLY for RP2040 processor ****

// Display type -  only define if RPi display
//#define RPI_DISPLAY_TYPE // 20MHz maximum SPI

// Only define one driver, the other ones must be commented out
//#define ILI9341_DRIVER       // Generic driver for common displays
//#define ILI9341_2_DRIVER     // Alternative ILI9341 driver, see https://github.com/Bodmer/TFT_eSPI/issues/1172
//#define ST7735_DRIVER      // Define additional parameters below for this display
//#define ILI9163_DRIVER     // Define additional parameters below for this display
//#define S6D02A1_DRIVER
//#define RPI_ILI9486_DRIVER // 20MHz maximum SPI
//#define HX8357D_DRIVER
//#define ILI9481_DRIVER
//#define ILI9486_DRIVER
//#define ILI9488_DRIVER     // WARNING: Do not connect ILI9488 display SDO to MISO if other devices share the SPI bus (TFT SDO does NOT tristate when CS is high)
#define ST7789_DRIVER      // Full configuration option, define additional parameters below for this display
//#define ST7789_2_DRIVER    // Minimal configuration option, define additional parameters below for this display
//#define R61581_DRIVER
//#define RM68140_DRIVER
//#define ST7796_DRIVER
//#define SSD1351_DRIVER
//#define SSD1963_480_DRIVER
//#define SSD1963_800_DRIVER
//#define SSD1963_800ALT_DRIVER
//#define ILI9225_DRIVER
//#define GC9A01_DRIVER

// Some displays support SPI reads via the MISO pin, other displays have a single
// bi-directional SDA pin and the library will try to read this via the MOSI line.
// To use the SDA line for reading data from the TFT uncomment the following line:

// #define TFT_SDA_READ      // This option is for ESP32 ONLY, tested with ST7789 and GC9A01 display only

// For ST7735, ST7789 and ILI9341 ONLY, define the colour order IF the blue and red are swapped on your display
// Try ONE option at a time to find the correct colour order for your display

//   #define TFT_RGB_ORDER TFT_RGB  // Colour order Red-Green-Blue
#define TFT_RGB_ORDER TFT_BGR  // Colour order Blue-Green-Red

// For M5Stack ESP32 module with integrated ILI9341 display ONLY, remove // in line below

// #define M5STACK

// For ST7789, ST7735, ILI9163 and GC9A01 ONLY, define the pixel width and height in portrait orientation
// #define TFT_WIDTH  80
// #define TFT_WIDTH  128
// #define TFT_WIDTH  172 // ST7789 172 x 320
// #define TFT_WIDTH  170 // ST7789 170 x 320
// #define TFT_WIDTH  240 // ST7789 240 x 240 and 240 x 320
// #define TFT_HEIGHT 160
// #define TFT_HEIGHT 128
// #define TFT_HEIGHT 240 // ST7789 240 x 240
// #define TFT_HEIGHT 320 // ST7789 240 x 320
// #define TFT_HEIGHT 240 // GC9A01 240 x 240
#define TFT_WIDTH 76 //(TFT_HEIGHT == 284) && (TFT_WIDTH == 76)
#define TFT_HEIGHT 284
#define CGRAM_OFFSET // Note this will always be defined for TFT_HEIGHT == 284) && (TFT_WIDTH == 76) Library will add offsets required

// For ST7735 ONLY, define the type of display, originally this was based on the
// colour of the tab on the screen protector film but this is not always true, so try
// out the different options below if the screen does not display graphics correctly,
// e.g. colours wrong, mirror images, or stray pixels at the edges.
// Comment out ALL BUT ONE of these options for a ST7735 display driver, save this
// this User_Setup file, then rebuild and upload the sketch to the board again:

// #define ST7735_INITB
// #define ST7735_GREENTAB
// #define ST7735_GREENTAB2
// #define ST7735_GREENTAB3
// #define ST7735_GREENTAB128    // For 128 x 128 display
// #define ST7735_GREENTAB160x80 // For 160 x 80 display (BGR, inverted, 26 offset)
// #define ST7735_ROBOTLCD       // For some RobotLCD Arduino shields (128x160, BGR, https://docs.arduino.cc/retired/getting-started-guides/TFT)
// #define ST7735_REDTAB
// #define ST7735_BLACKTAB
// #define ST7735_REDTAB160x80   // For 160 x 80 display with 24 pixel offset

// If colours are inverted (white shows as black) then uncomment one of the next
// 2 lines try both options, one of the options should correct the inversion.

// #define TFT_INVERSION_ON
#define TFT_INVERSION_OFF


// ##################################################################################
//
// Section 2. Define the pins that are used to interface with the display here
//
// ##################################################################################

// If a backlight control signal is available then define the TFT_BL pin in Section 2
// below. The backlight will be turned ON when tft.begin() is called, but the library
// needs to know if the LEDs are ON with the pin HIGH or LOW. If the LEDs are to be
// driven with a PWM signal or turned OFF/ON then this must be handled by the user
// sketch. e.g. with digitalWrite(TFT_BL, LOW);

// #define TFT_BL   32            // LED back-light control pin
// #define TFT_BACKLIGHT_ON HIGH  // Level to turn ON back-light (HIGH or LOW)



// We must use hardware SPI, a minimum of 3 GPIO pins is needed.
// Typical setup for ESP8266 NodeMCU ESP-12 is :
//
// Display SDO/MISO  to NodeMCU pin D6 (or leave disconnected if not reading TFT)
// Display LED       to NodeMCU pin VIN (or 5V, see below)
// Display SCK       to NodeMCU pin D5
// Display SDI/MOSI  to NodeMCU pin D7
// Display DC (RS/AO)to NodeMCU pin D3
// Display RESET     to NodeMCU pin D4 (or RST, see below)
// Display CS        to NodeMCU pin D8 (or GND, see below)
// Display GND       to NodeMCU pin GND (0V)
// Display VCC       to NodeMCU 5V or 3.3V
//
// The TFT RESET pin can be connected to the NodeMCU RST pin or 3.3V to free up a control pin
//
// The DC (Data Command) pin may be labelled AO or RS (Register Select)
//
// With some displays such as the ILI9341 the TFT CS pin can be connected to GND if no more
// SPI devices (e.g. an SD Card) are connected, in this case comment out the #define TFT_CS
// line below so it is NOT defined. Other displays such at the ST7735 require the TFT CS pin
// to be toggled during setup, so in these cases the TFT_CS line must be defined and connected.
//
// The NodeMCU D0 pin can be used for RST
//
//
// Note: only some versions of the NodeMCU provide the USB 5V on the VIN pin
// If 5V is not available at a pin you can use 3.3V but backlight brightness
// will be lower.


// ###### EDIT THE PIN NUMBERS IN THE LINES FOLLOWING TO SUIT YOUR ESP8266 SETUP ######

// For NodeMCU - use pin numbers in the form PIN_Dx where Dx is the NodeMCU pin designation
#define TFT_MISO -1// PIN_D6  // Automatically assigned with ESP8266 if not defined
#define TFT_MOSI  PIN_D7  // Automatically assigned with ESP8266 if not defined
#define TFT_SCLK  PIN_D5  // Automatically assigned with ESP8266 if not defined

#define TFT_CS    PIN_D8  // Chip select control pin D8
#define TFT_DC    PIN_D1// PIN_D3  // Data Command control pin
#define TFT_RST   -1//PIN_D4  // Reset pin (could connect to NodeMCU RST, see next line)
//#define TFT_RST  -1     // Set TFT_RST to -1 if the display RESET is connected to NodeMCU RST or 3.3V


//#define TFT_BL PIN_D1  // LED back-light (only for ST7789 with backlight control pin)

//#define TOUCH_CS PIN_D2     // Chip select pin (T_CS) of touch screen

//#define TFT_WR PIN_D2       // Write strobe for modified Raspberry Pi TFT only


// ######  FOR ESP8266 OVERLAP MODE EDIT THE PIN NUMBERS IN THE FOLLOWING LINES  ######

// Overlap mode shares the ESP8266 FLASH SPI bus with the TFT so has a performance impact
// but saves pins for other functions. It is best not to connect MISO as some displays
// do not tristate that line when chip select is high!
// Note: Only one SPI device can share the FLASH SPI lines, so a SPI touch controller
// cannot be connected as well to the same SPI signals.
// On NodeMCU 1.0 SD0=MISO, SD1=MOSI, CLK=SCLK to connect to TFT in overlap mode
// On NodeMCU V3  S0 =MISO, S1 =MOSI, S2 =SCLK
// In ESP8266 overlap mode the following must be defined

//#define TFT_SPI_OVERLAP

// In ESP8266 overlap mode the TFT chip select MUST connect to pin D3
//#define TFT_CS   PIN_D3
//#define TFT_DC   PIN_D5  // Data Command control pin
//#define TFT_RST  PIN_D4  // Reset pin (could connect to NodeMCU RST, see next line)
//#define TFT_RST  -1  // Set TFT_RST to -1 if the display RESET is connected to NodeMCU RST or 3.3V


// ###### EDIT THE PIN NUMBERS IN THE LINES FOLLOWING TO SUIT YOUR ESP32 SETUP   ######

// For ESP32 Dev board (only tested with ILI9341 display)
// The hardware SPI can be mapped to any pins

//#define TFT_MISO 19
//#define TFT_MOSI 23
//#define TFT_SCLK 18
//#define TFT_CS   15  // Chip select control pin
//#define TFT_DC    2  // Data Command control pin
//#define TFT_RST   4  // Reset pin (could connect to RST pin)
//#define TFT_RST  -1  // Set TFT_RST to -1 if display RESET is connected to ESP32 board RST

// For ESP32 Dev board (only tested with GC9A01 display)
// The hardware SPI can be mapped to any pins

//#define TFT_MOSI 15 // In some display driver board, it might be written as "SDA" and so on.
//#define TFT_SCLK 14
//#define TFT_CS   5  // Chip select control pin
//#define TFT_DC   27  // Data Command control pin
//#define TFT_RST  33  // Reset pin (could connect to Arduino RESET pin)
//#define TFT_BL   22  // LED back-light

//#define TOUCH_CS 21     // Chip select pin (T_CS) of touch screen

//#define TFT_WR 22    // Write strobe for modified Raspberry Pi TFT only

// For the M5Stack module use these #define lines
//#define TFT_MISO 19
//#define TFT_MOSI 23
//#define TFT_SCLK 18
//#define TFT_CS   14  // Chip select control pin
//#define TFT_DC   27  // Data Command control pin
//#define TFT_RST  33  // Reset pin (could connect to Arduino RESET pin)
//#define TFT_BL   32  // LED back-light (required for M5Stack)

// ######       EDIT THE PINs BELOW TO SUIT YOUR ESP32 PARALLEL TFT SETUP        ######

// The library supports 8-bit parallel TFTs with the ESP32, the pin
// selection below is compatible with ESP32 boards in UNO format.
// Wemos D32 boards need to be modified, see diagram in Tools folder.
// Only ILI9481 and ILI9341 based displays have been tested!

// Parallel bus is only supported for the STM32 and ESP32
// Example below is for ESP32 Parallel interface with UNO displays

// Tell the library to use 8-bit parallel mode (otherwise SPI is assumed)
//#define TFT_PARALLEL_8_BIT

// The ESP32 and TFT the pins used for testing are:
//#define TFT_CS   33  // Chip select control pin (library pulls permanently low
//#define TFT_DC   15  // Data Command control pin - must use a pin in the range 0-31
//#define TFT_RST  32  // Reset pin, toggles on startup

//#define TFT_WR    4  // Write strobe control pin - must use a pin in the range 0-31
//#define TFT_RD    2  // Read strobe control pin

//#define TFT_D0   12  // Must use pins in the range 0-31 for the data bus
//#define TFT_D1   13  // so a single register write sets/clears all bits.
//#define TFT_D2   26  // Pins can be randomly assigned, this does not affect
//#define TFT_D3   25  // TFT screen update performance.
//#define TFT_D4   17
//#define TFT_D5   16
//#define TFT_D6   27
//#define TFT_D7   14

// ######       EDIT THE PINs BELOW TO SUIT YOUR STM32 SPI TFT SETUP        ######

// The TFT can be connected to SPI port 1 or 2
//#define TFT_SPI_PORT 1 // SPI port 1 maximum clock rate is 55MHz
//#define TFT_MOSI PA7
//#define TFT_MISO PA6
//#define TFT_SCLK PA5

//#define TFT_SPI_PORT 2 // SPI port 2 maximum clock rate is 27MHz
//#define TFT_MOSI PB15
//#define TFT_MISO PB14
//#define TFT_SCLK PB13

// Can use Ardiuno pin references, arbitrary allocation, TFT_eSPI controls chip select
//#define TFT_CS   D5 // Chip select control pin to TFT CS
//#define TFT_DC   D6 // Data Command control pin to TFT DC (may be labelled RS = Register Select)
//#define TFT_RST  D7 // Reset pin to TFT RST (or RESET)
// OR alternatively, we can use STM32 port reference names PXnn
//#define TFT_CS   PE11 // Nucleo-F767ZI equivalent of D5
//#define TFT_DC   PE9  // Nucleo-F767ZI equivalent of D6
//#define TFT_RST  PF13 // Nucleo-F767ZI equivalent of D7

//#define TFT_RST  -1   // Set TFT_RST to -1 if the display RESET is connected to processor reset
                        // Use an Arduino pin for initial testing as connecting to processor reset
                        // may not work (pulse too short at power up?)

// ##################################################################################
//
// Section 3. Define the fonts that are to be used here
//
// ##################################################################################

// Comment out the #defines below with // to stop that font being loaded
// The ESP8366 and ESP32 have plenty of memory so commenting out fonts is not
// normally necessary. If all fonts are loaded the extra FLASH space required is
// about 17Kbytes. To save FLASH space only enable the fonts you need!

#define LOAD_GLCD   // Font 1. Original Adafruit 8 pixel font needs ~1820 bytes in FLASH
#define LOAD_FONT2  // Font 2. Small 16 pixel high font, needs ~3534 bytes in FLASH, 96 characters
#define LOAD_FONT4  // Font 4. Medium 26 pixel high font, needs ~5848 bytes in FLASH, 96 characters
#define LOAD_FONT6  // Font 6. Large 48 pixel font, needs ~2666 bytes in FLASH, only characters 1234567890:-.apm
#define LOAD_FONT7  // Font 7. 7 segment 48 pixel font, needs ~2438 bytes in FLASH, only characters 1234567890:-.
#define LOAD_FONT8  // Font 8. Large 75 pixel font needs ~3256 bytes in FLASH, only characters 1234567890:-.
//#define LOAD_FONT8N // Font 8. Alternative to Font 8 above, slightly narrower, so 3 digits fit a 160 pixel TFT
#define LOAD_GFXFF  // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts

// Comment out the #define below to stop the SPIFFS filing system and smooth font code being loaded
// this will save ~20kbytes of FLASH
#define SMOOTH_FONT


// ##################################################################################
//
// Section 4. Other options
//
// ##################################################################################

// For RP2040 processor and SPI displays, uncomment the following line to use the PIO interface.
//#define RP2040_PIO_SPI // Leave commented out to use standard RP2040 SPI port interface

// For RP2040 processor and 8 or 16-bit parallel displays:
// The parallel interface write cycle period is derived from a division of the CPU clock
// speed so scales with the processor clock. This means that the divider ratio may need
// to be increased when overclocking. It may also need to be adjusted dependant on the
// display controller type (ILI94341, HX8357C etc.). If RP2040_PIO_CLK_DIV is not defined
// the library will set default values which may not suit your display.
// The display controller data sheet will specify the minimum write cycle period. The
// controllers often work reliably for shorter periods, however if the period is too short
// the display may not initialise or graphics will become corrupted.
// PIO write cycle frequency = (CPU clock/(4 * RP2040_PIO_CLK_DIV))
//#define RP2040_PIO_CLK_DIV 1 // 32ns write cycle at 125MHz CPU clock
//#define RP2040_PIO_CLK_DIV 2 // 64ns write cycle at 125MHz CPU clock
//#define RP2040_PIO_CLK_DIV 3 // 96ns write cycle at 125MHz CPU clock

// For the RP2040 processor define the SPI port channel used (default 0 if undefined)
//#define TFT_SPI_PORT 1 // Set to 0 if SPI0 pins are used, or 1 if spi1 pins used

// For the STM32 processor define the SPI port channel used (default 1 if undefined)
//#define TFT_SPI_PORT 2 // Set to 1 for SPI port 1, or 2 for SPI port 2

// Define the SPI clock frequency, this affects the graphics rendering speed. Too
// fast and the TFT driver will not keep up and display corruption appears.
// With an ILI9341 display 40MHz works OK, 80MHz sometimes fails
// With a ST7735 display more than 27MHz may not work (spurious pixels and lines)
// With an ILI9163 display 27 MHz works OK.

// #define SPI_FREQUENCY   1000000
// #define SPI_FREQUENCY   5000000
// #define SPI_FREQUENCY  10000000
// #define SPI_FREQUENCY  20000000
#define SPI_FREQUENCY  27000000
// #define SPI_FREQUENCY  40000000
// #define SPI_FREQUENCY  55000000 // STM32 SPI1 only (SPI2 maximum is 27MHz)
// #define SPI_FREQUENCY  80000000

// Optional reduced SPI frequency for reading TFT
// #define SPI_READ_FREQUENCY  20000000

// The XPT2046 requires a lower SPI clock rate of 2.5MHz so we define that here:
// #define SPI_TOUCH_FREQUENCY  2500000

// The ESP32 has 2 free SPI ports i.e. VSPI and HSPI, the VSPI is the default.
// If the VSPI port is in use and pins are not accessible (e.g. TTGO T-Beam)
// then uncomment the following line:
//#define USE_HSPI_PORT

// Comment out the following #define if "SPI Transactions" do not need to be
// supported. When commented out the code size will be smaller and sketches will
// run slightly faster, so leave it commented out unless you need it!

// Transaction support is needed to work with SD library but not needed with TFT_SdFat
// Transaction support is required if other SPI devices are connected.

// Transactions are automatically enabled by the library for an ESP32 (to use HAL mutex)
// so changing it here has no effect

// #define SUPPORT_TRANSACTIONS
14

It would be ideal to make these changes to the library hosted on GitHub.
The display should support a refresh rate of 80 megahertz, try it

15

I guess you mean the SPI clock frequency, if so yes a quick test shows it working at its max speed of 80MHz.

16

@jackmiles3 Hi. Can you show me your whole ST7789_Rotation.h file please? I'm strugling with that display so God damn hard right now....

17

Hi, Marc Ketel has made a pull request for this display. Open the following link here to my post on github and follow Marc's link (atoomnetmarc) at the bottom of the page. Post back if you still face issues. Good luck!

18

Hi

Just a quick note to add infos

As i wans not able to make this screen with all thos detailled infos and modifications, i found other solution for my esp32 : here is my post :

hope this can help !