can anyone provide help(some piece of code/code snippet for )for using the FAT fs commands to access read/write/edit the files from the bf548 board side code in the USB Mass storage example for BF548 , using the external RAM as the mass storage
Are you using the File System Service in your application? Are you able to share your code so we can take a look at what you are trying to do?
There are examples that demonstrate how to use the File System Service to access a FAT fs from the Blackfin side, for example the Shell Browser example at "...\Blackfin\Examples\ADSP-BF548 EZ-KIT Lite\Services\File System\VDK\shell_browser\". This example provides a complete example for managing the file system from multiple devices (SD, HD, RAM disk).
If you are having issues with your implementation, I recommend reviewing that example - though it uses VDK, the concepts of initializing the file system, and performing file operations are OS-agnostic.
Retrieving data ...