uSD acting as a USB Mass Storage

william chan

Hi geniuses,

I have a uSD card connected to a Propeller in a battery powered board.
How do I wire it so when I plug the board to a PC USB port, it acts as a USB Mass Storage Device so that the PC can read the files on the uSD card?

Is there a FTDI chip or another chip that helps do this?

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Mike Green

You can't. The PC expects something that acts as a USB mass storage device and the FTDI chip can't do that. The Propeller isn't really fast enough or has enough memory for it to act as a mass storage client. If you don't need the speed or automatic processing of the connection, you could provide a program on the Propeller and a separate program on the PC that would be able to transfer a file at a time back and forth, something like Kermit or using YModem protocol.