1.13 MPFS Filesystem using NVM Media

This application shows an example of implementing a MPFS disk in device Internal Flash memory.

Description

File System Operations on NVM:

  • The application contains a MPFS disk image in the internal Flash memory. The disk image contains two files named:
    • FILE.txt, Size = 11 Bytes. The content of the file is: “Hello World”
    • TEST.txt, Size = 10 Bytes. The content of the file is: “1234567890”
  • The application performs following file system related operations:
    • SYS_FS_FileRead
    • SYS_FS_FileStat
    • SYS_FS_FileSize
    • SYS_FS_FileSeek
    • SYS_FS_FileEOF
  • The contents of both the files are read and compared with the expected strings as mentioned above. If the string compare is successful, An LED indication is provided.

File system layer uses:

  • Memory driver to communicate with underlying NVM media

Downloading and Building the Application

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/fs/nvm_mpfs/firmware.

To build the application, refer to the following table and open the project using its IDE.

Project NameDescription
sam_c21n_xpro.XMPLABX project for SAMC21N Xplained Pro Evaluation Kit

Setting Up the Hardware

The following table shows the target hardware for the application projects.

Project NameDescription
sam_c21n_xpro.XSAMC21N Xplained Pro Evaluation Kit

Setting Up SAMC21N Xplained Pro Evaluation Kit

  • Connect the Debug USB port on the board to the computer using a micro USB cable

Running the Application

  1. Build and program the application using its IDE
  2. The LED is turned ON when the following criteria is satisfied
    • File “FILE.txt” has the string “Hello World” in it
    • File “TEST.txt” has the string “1234567890” in it
Refer to the following table for LED name:
BoardLED Name
SAMC21N Xplained Pro Evaluation KitLED0