SAMD21 internal/serial flash as MSC

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Dear all,

I will receive my samd21 xplained pro soon and wanted to ask if someone could help me. I'm looking for a hint/example for using the internal or external serial flash as a MSC block storage.

I found an example for an SD card but I'm really new to the samd21 as well as to MSC.

Any help is highly appreciated.


UPDATE: I just found this example:

It can mount any of the available memories as MSC. Exactly what I wanted. Now I do have another question. If I place a .txt file on the internal or external flash. How can I read this file from the SAMD21 side? Does it have to be fatfs formatted?

Last Edited: Wed. Feb 6, 2019 - 10:21 PM