Hi,
I'm unsure which examples you have already looked at, but we generally recommend the Shell_Browser example as a good starting point. You can find this example using the following path in VisualDSP++ 5.1:
C:\Program Files (x86)\Analog Devices\VisualDSP 5.1\Blackfin\Examples\ADSP-BF548 EZ-KIT Lite\Services\File System\VDK\shell_browser
Please be aware you can find detailed documentation on the Secure Digital Host Physical Interface Driver here:
C:\Program Files (x86)\Analog Devices\VisualDSP 5.1 (Base)\Blackfin\docs\drivers\pid\sdh
Regards,
David.