1.10 FILEX File System Using SDMMC Media

This application shows an example of using the FILEX File System to access and modify the contents of an SD card using the SDMMC driver.

Description

File System Operations on the SD Card

  • Application creates a file named newfile.txt in the root directory of the SD card and writes FILEX filesystem demo using SD CARD Media string into file
  • Application reads file named newfile.txt and stores its content into memory buffer
  • Then read memory buffer is compared with the string that was written to the file. If the string compare is successful, an LED indication is provided.
  • During execution, the application performs following file system related operations:
    • SYS_FS_DriveFormat
    • SYS_FS_Mount
    • SYS_FS_CurrentDriveSet
    • SYS_FS_FileDirectoryRemove
    • SYS_FS_FileOpen
    • SYS_FS_FileWrite
    • SYS_FS_FileSeek
    • SYS_FS_FileRead
    • SYS_FS_FileStat
    • SYS_FS_FileEOF
    • SYS_FS_FileSize
    • SYS_FS_FileClose
    • SYS_FS_Unmount

File System Layer Uses

  • FILEX File System
  • SDMMC Driver to communicate to SD card

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/sdmmc_filex/firmware.

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

Project NameDescription
sam_e54_xpro.XMPLAB X project for SAM E54 Xplained Pro Evaluation Kit

Setting Up the Hardware

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

Project NameDescription
sam_e54_xpro.XSAM E54 Xplained Pro Evaluation Kit

Setting Up SAM E54 Xplained Pro Evaluation Kit

  • To run this application, following additional hardware is required:
    • One microSD card
  • 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. Insert the SD card in the SD card slot of the device.
  3. The LED is turned ON when the File newfile.txt has the app data FILEX filesystem demo using SD CARD Media written in it.
    Refer to the following table for LED name:
    BoardLED Name
    SAM E54 Xplained Pro Evaluation KitLED0
  4. If LED is ON, insert the SD card on to the host PC.
  5. SD card should have the file newfile.txt and should have FILEX filesystem demo using SD CARD Media string.