[Arduino source code for KC868-M16]-04 -Read / Write SD card arduino source code

Code:
#include "FS.h"

#include "SD.h"

#include "SD_MMC.h"

#define BOARD_HAS_1BIT_SDMMC

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() {

  pinMode(2,INPUT_PULLUP);

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

  Serial.begin(115200);

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

  delay(1000);

  

  /* SD_MMC 1-bit Mode */

  if (!SD_MMC.begin("/cdcard", true)) {

    Serial.println("Card Mount Failed");

    return;

  }

  testIO(SD_MMC);

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

}

void loop() {

}