#include <M5UnitOLED.h>
M5UnitOLED display ( 26, 32, 400000 ); // SDA, SCL, FREQ
M5Canvas canvas(&display);

static constexpr char text[] = "Hello world ! こんにちは世界！ this is long long string sample. 寿限無、寿限無、五劫の擦り切れ、海砂利水魚の、水行末・雲来末・風来末、喰う寝る処に住む処、藪ら柑子の藪柑子、パイポ・パイポ・パイポのシューリンガン、シューリンガンのグーリンダイ、グーリンダイのポンポコピーのポンポコナの、長久命の長助";
static constexpr size_t textlen = sizeof(text) / sizeof(text[0]);
int textpos = 0;
int scrollstep = 2;

void setup(void) 
{
  display.begin();

  if (display.width() < display.height())
  {
    display.setRotation(display.getRotation() ^ 1);
  }


  canvas.setColorDepth(1); // mono color
  canvas.setFont(&fonts::lgfxJapanMinchoP_32);
  canvas.setTextWrap(false);
  canvas.setTextSize(2);
  canvas.createSprite(display.width() + 64, 72);
}

void loop(void)
{
  int32_t cursor_x = canvas.getCursorX() - scrollstep;
  if (cursor_x <= 0)
  {
    textpos = 0;
    cursor_x = display.width();
  }

  canvas.setCursor(cursor_x, 0);
  canvas.scroll(-scrollstep, 0);
  while (textpos < textlen && cursor_x <= display.width())
  {
    canvas.print(text[textpos++]);
    cursor_x = canvas.getCursorX();
  }
  display.waitDisplay();
  canvas.pushSprite(&display, 0, (display.height() - canvas.height()) >> 1);
}

I don´t like it ... please remove it and give a try in the loop with a static string ...
And also, put any serial.println() debug code to see what code are you running

#include <M5UnitOLED.h>

//M5UnitOLED display; // default setting

M5UnitOLED display ( 21, 22, 400000 ); // SDA, SCL, FREQ

...and give a try in the loop with a static string ...

sorry but I don't understand ...

I deleted :
static constexpr const char* text[] = { text0, text1, text2, text3, text4, text5, text6, text7 };

this is the compiling error message

    Arduino:1.8.13 (Windows 10), Scheda:"M5Stick-C, Default, 1500000, None

    C:\Users\Documents\Arduino\OLEDDAJE\OLEDDAJE.ino: In function 'void loop()':
    
    
    OLEDDAJE:41:39: error: 'text' was not declared in this scope
    
    
       canvas.printf("%04d:%s\r\n", count, text[count & 7]);
    
    
                                           ^
    
    
    Più di una libreria trovata per "SPI.h"
    
    
    Usata: C:\Users\AppData\Local\Arduino15\packages\m5stack\hardware\esp32\1.0.7\libraries\SPI
    
    
    Non usata: C:\Users\Documents\Arduino\libraries\SPI
    
    
    exit status 1
    
    
    'text' was not declared in this scope

    Questo report potrebbe essere più ricco di informazioni abilitando l'opzione
    
    "Mostra un output dettagliato durante la compilazione"
    
    in "File -> Impostazioni

static constexpr const char* text[] = { text0, text1, text2, text3, text4, text5, text6, text7 };

I don´t like it ... please remove it and give a try in the loop with a static string ...

And also, put any serial.println() debug code to see what code are you running

you need to #include <M5UnitOLED.h>

#include <M5UnitOLED.h>

M5UnitOLED display;

M5Canvas canvas(&display);

static constexpr char text[] = "Hello world ! こんにちは世界！ this is long long string sample. 寿限無、寿限無、五劫の擦り切れ、海砂利水魚の、水行末・雲来末・風来末、喰う寝る処に住む処、藪ら柑子の藪柑子、パイポ・パイポ・パイポのシューリンガン、シューリンガンのグーリンダイ、グーリンダイのポンポコピーのポンポコナの、長久命の長助";
static constexpr size_t textlen = sizeof(text) / sizeof(text[0]);
int textpos = 0;
int scrollstep = 2;

void setup(void) 
{
  display.init();
  display.setRotation(2);
  canvas.setColorDepth(1); // mono color
  canvas.setFont(&fonts::lgfxJapanMinchoP_32);
  canvas.setTextWrap(false);
  canvas.setTextSize(2);
  canvas.createSprite(display.width() + 64, 72);
}

void loop(void)
{
  int32_t cursor_x = canvas.getCursorX() - scrollstep;
  if (cursor_x <= 0)
  {
    textpos = 0;
    cursor_x = display.width();
  }

  canvas.setCursor(cursor_x, 0);
  canvas.scroll(-scrollstep, 0);
  while (textpos < textlen && cursor_x <= display.width())
  {
    canvas.print(text[textpos++]);
    cursor_x = canvas.getCursorX();
  }
  display.waitDisplay();
  canvas.pushSprite(&display, 0, (display.height() - canvas.height()) >> 1);
}

this sketch compile but doesn't display nothing

no error message

this is the atom lite boot on serial monitor after uploaded sketch

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 188777542, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1044
load:0x40078000,len:8896
load:0x40080400,len:5816
entry 0x400806ac

#include <M5UnitOLED.h>

M5UnitOLED display;

M5Canvas canvas(&display);

static constexpr char text[] = "Hello world ! こんにちは世界！ this is long long string sample. 寿限無、寿限無、五劫の擦り切れ、海砂利水魚の、水行末・雲来末・風来末、喰う寝る処に住む処、藪ら柑子の藪柑子、パイポ・パイポ・パイポのシューリンガン、シューリンガンのグーリンダイ、グーリンダイのポンポコピーのポンポコナの、長久命の長助";
static constexpr size_t textlen = sizeof(text) / sizeof(text[0]);
int textpos = 0;
int scrollstep = 2;

void setup(void) 
{
  display.init();
  display.setRotation(2);
  canvas.setColorDepth(1); // mono color
  canvas.setFont(&fonts::lgfxJapanMinchoP_32);
  canvas.setTextWrap(false);
  canvas.setTextSize(2);
  canvas.createSprite(display.width() + 64, 72);
}

void loop(void)
{
  int32_t cursor_x = canvas.getCursorX() - scrollstep;
  if (cursor_x <= 0)
  {
    textpos = 0;
    cursor_x = display.width();
  }

  canvas.setCursor(cursor_x, 0);
  canvas.scroll(-scrollstep, 0);
  while (textpos < textlen && cursor_x <= display.width())
  {
    canvas.print(text[textpos++]);
    cursor_x = canvas.getCursorX();
  }
  display.waitDisplay();
  canvas.pushSprite(&display, 0, (display.height() - canvas.height()) >> 1);
}

this is a test sketch:

#include <M5GFX.h>

M5GFX display;
M5Canvas canvas(&display);

static constexpr char text0[] = "hello world";
static constexpr char text1[] = "this";
static constexpr char text2[] = "is";
static constexpr char text3[] = "text";
static constexpr char text4[] = "log";
static constexpr char text5[] = "vertical";
static constexpr char text6[] = "scroll";
static constexpr char text7[] = "sample";
static constexpr const char* text[] = { text0, text1, text2, text3, text4, text5, text6, text7 };

void setup(void)
{
  display.begin();

  if (display.isEPD())
  {
    display.setEpdMode(epd_mode_t::epd_fastest);
    display.invertDisplay(true);
    display.clear(TFT_BLACK);
  }
  if (display.width() < display.height())
  {
    display.setRotation(display.getRotation() ^ 1);
  }

  canvas.setColorDepth(1); // mono color
  canvas.createSprite(display.width(), display.height());
  canvas.setTextSize((float)canvas.width() / 160);
  canvas.setTextScroll(true);
}

void loop(void)
{
  static int count = 0;

  canvas.printf("%04d:%s\r\n", count, text[count & 7]);
  canvas.pushSprite(0, 0);
  ++count;
}

this is the arduino ide output:

Lo sketch usa 301153 byte (22%) dello spazio disponibile per i programmi. Il massimo è 1310720 byte.
Le variabili globali usano 17052 byte (5%) di memoria dinamica, lasciando altri 310628 byte liberi per le variabili locali. Il massimo è 327680 byte.
esptool.py v3.0-dev
Serial port COM8
Connecting.....
Chip is ESP32-PICO-D4 (revision 1)
Features: WiFi, BT, Dual Core, 240MHz, Embedded Flash, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: d8:a0:1d:5c:95:0c
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 1500000
Changed.
Configuring flash size...
Auto-detected Flash size: 4MB
Compressed 8192 bytes to 47...
Writing at 0x0000e000... (100 %)
Wrote 8192 bytes (47 compressed) at 0x0000e000 in 0.0 seconds (effective 4096.1 kbit/s)...
Hash of data verified.
Compressed 15856 bytes to 10276...
Writing at 0x00001000... (100 %)
Wrote 15856 bytes (10276 compressed) at 0x00001000 in 0.1 seconds (effective 991.0 kbit/s)...
Hash of data verified.
Compressed 301264 bytes to 153424...
Writing at 0x00010000... (10 %)
Writing at 0x00014000... (20 %)
Writing at 0x00018000... (30 %)
Writing at 0x0001c000... (40 %)
Writing at 0x00020000... (50 %)
Writing at 0x00024000... (60 %)
Writing at 0x00028000... (70 %)
Writing at 0x0002c000... (80 %)
Writing at 0x00030000... (90 %)
Writing at 0x00034000... (100 %)
Wrote 301264 bytes (153424 compressed) at 0x00010000 in 2.8 seconds (effective 870.7 kbit/s)...
Hash of data verified.
Compressed 3072 bytes to 128...
Writing at 0x00008000... (100 %)
Wrote 3072 bytes (128 compressed) at 0x00008000 in 0.0 seconds (effective 1365.3 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...
Trovata libreria non valida in C:\Users\Documents\Arduino\libraries\M5Stack_LovyanLauncher-master: Nessun header file (.h) trovato in C:\Users\Documents\Arduino\libraries\M5Stack_LovyanLauncher-master
Trovata libreria non valida in C:\Users\Documents\Arduino\libraries\URM-master: Nessun header file (.h) trovato in C:\Users\Documents\Arduino\libraries\URM-master

this is the serial monitor booting the atom lite

ets Jun  8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 188777542, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1044
load:0x40078000,len:8896
load:0x40080400,len:5816
entry 0x400806ac

I tryed with core gray, core2, atom lite without any result...

may be I'm missing something......

https://github.com/m5stack/M5GFX