Main Site Documentation

FlashFileSystem Module Updated includes 4.3, 4.2 and 4.1 drivers


#1

I’ve had a couple of Flash Modules ( https://www.ghielectronics.com/catalog/product/389 ) for a very long time and never got around to playing around with them but lately I had a project where I wanted some persistent storage and so this module fit the bill rather nicely. When I found @ taylorza very worthy FlashFileSystem module driver I thought hey this just makes it too easy to use, but their wasn’t a 4.3 driver so I’d thought I fix that and after talking with @ taylorza we decided to check the code etc into ‘Gadgeteer Community’ site on CodePlex https://wegadgeteer.codeplex.com such that both the source code and an installer https://wegadgeteer.codeplex.com/releases/view/611095 are available. Thanks again to @ taylorza for this very helpful and cool module driver.


#2

Just so people get an idea of just how easy this is to use this is the code from the TestApp (I always try to have a TestApp that shows how to use a module)

           
            if (!flashFileSystem.CheckIfFormatted())
            {
                flashFileSystem.Format();
            }

            flashFileSystem.Mount();

            var newfile = "file";
            var count = 0;

            while (flashFileSystem.Exists(newfile + count + ".txt"))
            {
                count++;
            }

            newfile = newfile + count + ".txt";

            var openfile = flashFileSystem.Create(newfile);

            var stream = new StreamWriter(openfile);

            stream.WriteLine("Hello World");

            stream.Close();
            openfile.Close();

            flashFileSystem.Copy(newfile, TRASHTHIS);

            var fileNames = flashFileSystem.GetFiles();

            foreach (var fileName in fileNames)
            {
                var size = flashFileSystem.GetFileSize(fileName);
                var creation = flashFileSystem.GetFileCreationTime(fileName);
                Debug.Print(fileName + " " + size + " " + creation);
            }

            openfile = flashFileSystem.Open(newfile, FileMode.Open);
            var reader = new StreamReader(openfile);

            var message = reader.ReadLine();
            Debug.Print(message);

            reader.Close();
            stream.Close();

            flashFileSystem.Delete(TRASHTHIS);

            if (flashFileSystem.Exists(TRASHTHIS))
                Debug.Print("Delete Failed");
            else
            {
                Debug.Print("Delete success");
            }

            flashFileSystem.Compact();


#3

How thread safe is it? Can I write different files simultaneously from different threads?


#4

@ ianlee74 - All file operations are synchronized so you should not have issues writing to the device from multiple threads. Of course if you find any issues I will address them to the best of my abilities.


#5

Oh sure, keep bragging about how smart you are! 8)


#6

@ Gary - :slight_smile: My challenge is time… Being smart is just a matter of being good at Google.