Create a custom library which uses Arduino Extended Database Library

Here is the modified source and header for the Runner and DBabstraction class:

Runner.h:

#ifndef Runner_h
#define Runner_h

#include "Arduino.h"
#include "DBabstraction.h"

class Runner {
public:
    Runner();
    void run();
    static DBabstraction *globalDB;
    void globalConfigWriter( unsigned long address, byte data ) {
        globalDB->dbWriter(address, data);
    }
    byte globalConfigReader( unsigned long address ) {
        return globalDB->dbReader(address);
    }
private:
    
};

#endif // Runner_h

Runner.cpp:

// Library header
#include "Runner.h"

// Code
/**************************************************/

DBabstraction *Runner::globalDB = NULL;

// public functions
Runner::Runner(){
    globalDB = new DBabstraction();
    if(globalDB)
        globalDB->begin();
}

void Runner::run(){
    //Serial.printf("ok\n");
}

DBabstraction.h:

#ifndef DBabstraction_h
#define DBabstraction_h

#include "Arduino.h"
#include <EDB.h>
//Use SPIFFS FS as data storage
#include "LStorage.h"
#include "LFlash.h"


#define Drv LFlash          // use Internal 10M Flash
#define TABLE_SIZE 8192
#define FILE_PATH "tdb.txt"

// The number of demo records that should be created.  This should be less
// than (TABLE_SIZE - sizeof(EDB_Header)) / sizeof(LogEvent).  If it is higher,
// operations will return EDB_OUT_OF_RANGE for all records outside the usable range.
#define RECORDS_TO_CREATE 10


//
class DBabstraction {
public:
    DBabstraction();
    EDB *myDB;
    void begin();
    static LFile myFile;
    static void dbWriter( unsigned long address, byte data );
    static byte dbReader( unsigned long address );
    
private:
    static DBabstraction * pInstance;
};

#endif // DBabstraction_h

DBabstraction.cpp:

// Library header
#include "DBabstraction.h"

DBabstraction *DBabstraction::pInstance = NULL;
//constructor
DBabstraction::DBabstraction(){
    pInstance = this;
    myDB = new EDB(DBabstraction::dbWriter, DBabstraction::dbReader); //
}
//public functions
void DBabstraction::dbWriter(unsigned long address, byte data ){
    /* nothing */
    
}

byte DBabstraction::dbReader( unsigned long address){
    /* nothing */
    
}

//public functions
void DBabstraction::begin(){
    /* nothing */
    
}
// Code DBabstraction.cpp

Compiles, and no more warning related to the globalDB or myDB, seems to be working (I need to test more and declare&implement the write and read functions, and higher logic).
At this stage again I want to thank you for your patience and humor PaulS :smiley:

Still before implementing the read/write functions there are two warnings during compilation, how can I address them Paul ?

In file included from /Users/Thibault/Desktop/CPPtest/CPPTEST.ino:3:0:
/Users/Thibault/Documents/Arduino/libraries/EDB/EDB.h:24:25: warning: 'typedef' was ignored in this declaration [enabled by default]
                         };

                         ^
In file included from /var/folders/y8/2cf22w216j7cxt1k7g54v1y80000gp/T/arduino_build_563584/sketch/DBabstraction.h:5:0,
                 from /var/folders/y8/2cf22w216j7cxt1k7g54v1y80000gp/T/arduino_build_563584/sketch/Runner.h:5,
                 from /var/folders/y8/2cf22w216j7cxt1k7g54v1y80000gp/T/arduino_build_563584/sketch/Runner.cpp:2:
/Users/Thibault/Documents/Arduino/libraries/EDB/EDB.h:24:25: warning: 'typedef' was ignored in this declaration [enabled by default]
                         };

                         ^

Merci beaucoup.