1.2 FAT File System Using NVM Media

Description

File System Operations on NVM:

Application places a FAT disk image consisting of a Master Boot Record (MBR) sector, Logical Boot sector, File allocation table, and Root directory area in the internal Flash memory (NVM)
During execution, the application first opens an existing file named FILE.TXT and performs following file system related operations:
- SYS_FS_FileStat
- SYS_FS_FileSize
- SYS_FS_FileSeek
- SYS_FS_FileEOF
It tries to read the file and checks if string “Data” is present. If present it continues to next step or it fails the application
Finally, the string “Hello World” is written to this file. The string is then read and compared with the string that was written to the file. 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.

Path of the application within the repository is apps/fs/nvm_fat.

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


Project Name	Description
pic32wm_bw1_curiosity.X	MPLAB X project for PIC32WM-BW1 Curiosity board

Setting Up the Hardware

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


Project Name	Description
pic32wm_bw1_curiosity.X	PIC32WM-BW1 Curiosity board

Setting Up PIC32WM-BW1 Curiosity Board

Connect the USB port on the board to the computer using a USB Type-C cable

Running the Application

Build and program the application using its IDE.
Press Switch to start the file operations.
The LED is turned ON when the FILE.TXT file has the app data “Hello World” written in it

Refer to the following table for the Switch and LED names:


Board	Switch Name	LED Name
PIC32WM-BW1 Curiosity board	SW2	Green LED