sd_read_write.cpp

#include "sd_read_write.h"

SPIClass SD_SPI(HSPI);

bool sdmmcInit(void){
  SD_SPI.begin(SD_CLK, SD_MISO, SD_MOSI, SD_CS);
  if(!SD.begin(SD_CS,SD_SPI,40000000)) 
  {
    while(1)
    { 
        Serial.println("Card Mount Failed - are you sure SD card inserterd ? ");
        delay(1000);
    }
    return false;
  }
  uint8_t cardType = SD.cardType();
  if(cardType == CARD_NONE){
      Serial.println("No SD card attached");
      return false;
  }
  //Serial.print("SD Card Type: ");
  if(cardType == CARD_MMC){
  //    Serial.println("MMC");
  } else if(cardType == CARD_SD){
  //    Serial.println("SDSC");
  } else if(cardType == CARD_SDHC){
   //   Serial.println("SDHC");
  } else {
      Serial.println("UNKNOWN");
  }
  uint64_t cardSize = SD.cardSize() / (1024 * 1024);
 // Serial.printf("SD Card Size: %lluMB\n", cardSize);  
 // Serial.printf("Total space: %lluMB\r\n", SD.totalBytes() / (1024 * 1024));
 // Serial.printf("Used space: %lluMB\r\n", SD.usedBytes() / (1024 * 1024));
 return true;
}

void listDir(fs::FS &fs, const char * dirname, uint8_t levels){
    Serial.printf("Listing directory: %s\n", dirname);

    File root = fs.open(dirname);
    if(!root){
        Serial.println("Failed to open directory");
        return;
    }
    if(!root.isDirectory()){
        Serial.println("Not a directory");
        return;
    }

    File file = root.openNextFile();
    while(file){
        if(file.isDirectory()){
            Serial.print("  DIR : ");
            Serial.println(file.name());
            if(levels){
                listDir(fs, file.path(), levels -1);
            }
        } else {
            Serial.print("  FILE: ");
            Serial.print(file.name());
            Serial.print("  SIZE: ");
            Serial.println(file.size());
        }
        file = root.openNextFile();
    }
}

void createDir(fs::FS &fs, const char * path){
    Serial.printf("Creating Dir: %s\n", path);
    if(fs.mkdir(path)){
        Serial.println("Dir created");
    } else {
        Serial.println("mkdir failed");
    }
}

void removeDir(fs::FS &fs, const char * path){
    Serial.printf("Removing Dir: %s\n", path);
    if(fs.rmdir(path)){
        Serial.println("Dir removed");
    } else {
        Serial.println("rmdir failed");
    }
}

void readFile(fs::FS &fs, const char * path){
    Serial.printf("Reading file: %s\n", path);

    File file = fs.open(path);
    if(!file){
        Serial.println("Failed to open file for reading");
        return;
    }

    Serial.print("Read from file: ");
    while(file.available()){
        Serial.write(file.read());
    }
}

void writeFile(fs::FS &fs, const char * path, const char * message){
    Serial.printf("Writing file: %s\n", path);

    File file = fs.open(path, FILE_WRITE);
    if(!file){
        Serial.println("Failed to open file for writing");
        return;
    }
    if(file.print(message)){
        Serial.println("File written");
    } else {
        Serial.println("Write failed");
    }
}

void appendFile(fs::FS &fs, const char * path, const char * message){
    Serial.printf("Appending to file: %s\n", path);

    File file = fs.open(path, FILE_APPEND);
    if(!file){
        Serial.println("Failed to open file for appending");
        return;
    }
    if(file.print(message)){
        Serial.println("Message appended");
    } else {
        Serial.println("Append failed");
    }
}

void renameFile(fs::FS &fs, const char * path1, const char * path2){
    Serial.printf("Renaming file %s to %s\n", path1, path2);
    if (fs.rename(path1, path2)) {
        Serial.println("File renamed");
    } else {
        Serial.println("Rename failed");
    }
}

void deleteFile(fs::FS &fs, const char * path){
    Serial.printf("Deleting file: %s\n", path);
    if(fs.remove(path)){
        Serial.println("File deleted");
    } else {
        Serial.println("Delete failed");
    }
}

void testFileIO(fs::FS &fs, const char * path){
    File file = fs.open(path);
    static uint8_t buf[512];
    size_t len = 0;
    uint32_t start = millis();
    uint32_t end = start;
    if(file){
        len = file.size();
        size_t flen = len;
        start = millis();
        while(len){
            size_t toRead = len;
            if(toRead > 512){
                toRead = 512;
            }
            file.read(buf, toRead);
            len -= toRead;
        }
        end = millis() - start;
        Serial.printf("%u bytes read for %u ms\r\n", flen, end);
        file.close();
    } else {
        Serial.println("Failed to open file for reading");
    }

    file = fs.open(path, FILE_WRITE);
    if(!file){
        Serial.println("Failed to open file for writing");
        return;
    }

    size_t i;
    start = millis();
    for(i=0; i<2048; i++){
        file.write(buf, 512);
    }
    end = millis() - start;
    Serial.printf("%u bytes written for %u ms\n", 2048 * 512, end);
    file.close();
}

void writejpg(fs::FS &fs, const char * path, const uint8_t *buf, size_t size){
    File file = fs.open(path, FILE_WRITE);
    if(!file){
      Serial.println("Failed to open file for writing");
      return;
    }
    file.write(buf, size);
    //Serial.printf("Saved file to path: %s\r\n", path);
    file.close();
}

int readFileNum(fs::FS &fs, const char * dirname){
    File root = fs.open(dirname);
    if(!root){
        Serial.println("Failed to open directory");
        return -1;
    }
    if(!root.isDirectory()){
        Serial.println("Not a directory");
        return -1;
    }

    File file = root.openNextFile();
    int num=0;
    while(file){
      file = root.openNextFile();
      num++;
    }
    return num;  
}


void deleteAllFiles(fs::FS &fs, const char *dirname)
{
    File root = fs.open(dirname);

    if (!root || !root.isDirectory())
    {
        Serial.println("Directory open failed");
        return;
    }

    std::vector<String> files;

    File file = root.openNextFile();

    while (file)
    {
        if (!file.isDirectory())
        {
            files.push_back(file.path());
        }

        file.close();
        file = root.openNextFile();
    }

    root.close();

    for (auto &p : files)
    {
        Serial.printf("Deleting %s\n", p.c_str());

        if (!fs.remove(p.c_str()))
            Serial.println("FAILED");
    }
}