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Remove USB Device Safely Issue

Hi All,

I implement the usb mass storage device using uSD card in LPC4357 board and I use Keil USB Stack.

Now there is an issue that the usb mass storage device can't be removed from PC(Win 7). The usb mass storage device should have disappeared after I removed the device safely by clicking the Safely Remove Hardware tray icon.

I assume that the Keil USB Stack would receive a event from hardware driver or ISR anyhow and handle this event. So What I missed?

0 Westonsupermare Pier over 9 years ago in reply to Milorad Cvjetkovic

Not sure Windows tells the device anything, you might get a Medium Eject/Unload command, but it is mainly flushing it's buffers, historically it hasn't supported ejecting NTFS media well.
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0 Milorad Cvjetkovic over 9 years ago in reply to Leo Cheng

It is safe, as this action just forces Windows to write any cached data to media, before it can be removed.
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0 Leo Cheng over 9 years ago

The computer prompts that the USB device is removed successfully, but the usb disk still exits. Is this OK?
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