KinCony ATF (ESP32 SD card module) Read/Write arduino demo code

Code:
/*

-----------------------------------------------

|  NodeMCU32s            |   SD Card          |

|  --------------------------------------------

|  -                     |   D02              |

|  -                     |   D01              |

|  GPIO23                |   CMD(MOSI)        |

|  GPIO19                |   D00(MISO)        |

|  GPIO18                |   CLK(SCK)         |

|  GPIO5                 |   D03(SS)          |

|  GND                   |   GND              |

|  VCC(3.3v)             |   VCC              |

-----------------------------------------------

*/

#include "FS.h"

#include "SD.h"

#include "SD_MMC.h"



void WriteFile(fs::FS &fs, const char *path, uint8_t *buf, int len)

{

  //unsigned long start_time = millis();

  Serial.printf("write [%s]...\n", path);



  File file = fs.open(path, FILE_WRITE);

  if (!file) {

    Serial.println("Failed to open file for writing");

    return;

  }

  

  if (!file.write(buf, len)) {

      Serial.println("Write failed");

      return;

    }



  file.flush();

  file.close();



  Serial.printf("Write [%s] Complete", path);

}



void ReadFile(fs::FS &fs, const char *path, uint8_t *buf, int len)

{

  Serial.printf("read [%s]...\n", path);



  File file = fs.open(path);

  if (!file) {

    Serial.println("Failed to open file for reading");

    return;

  }



  if (!file.read(buf, len)) {

      Serial.println("Read failed");

      return;

  }

  

  file.close();



  Serial.printf("Read [%s] Complete: %s", path, buf);

}



void testIO(fs::FS &fs)

{

  char buf[] = "hello world";



  WriteFile(fs, "/test.txt", (uint8_t *)buf, strlen(buf));

  ReadFile(fs, "/test.txt", (uint8_t *)buf, strlen(buf));

}



void setup() {

  // put your setup code here, to run once:

  Serial.begin(115200);



  Serial.println("please insert SD card");

  delay(8000);



  /* SD SPI Mode at VSPI */

  SPIClass spi = SPIClass(HSPI);

  spi.begin(18 /* SCK */, 19 /* MISO */, 23 /* MOSI */, 5 /* SS */);

  if (!SD.begin(5 /* SS */, spi, 80000000)) {

    Serial.println("Card Mount Failed");

    return;

  }

  testIO(SD);

  SD_MMC.end(); // cancel load SD card

}

void loop() {

}