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USB MSC & Windows7

Pavel Faltynek

Hi,

some time ago I implemented Mass Storage device to access SD Card via USB (lpc23xx). The design was inspired by the Keil free example (accessing RAM via MSC).

- Windows XP 32bit recognizes the device, "installs" driver and everything seems to be OK.
- Windows 7 64bit recognizes the device, "installs" driver, but claims the device is not formated and should be and offers formating (up to now I refused, because I needed the files stored on the card). Anyway that's nonsense, because there is regular FAT with some files present on the card.

The question is: before I start digging, isn't anyone USB skilled of you aware of any difference the Win7 needs and WinXP does not?

Thanks for info.

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