usb mass storage client driver
- From: "jt" <jt@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 23 Jun 2005 10:48:02 -0700
I was trying to implement mass storage device on USB function controller
driver on Windows CE 5.0. After configuring the registry USB function
controller driver for Mass storage class and connected the device, I found
that one of the command in mass storage READ_FORMAT_CAPACITY (0x23) was not
supported. I got the debug messages as below:
UsbMsFn!STORE_IsCommandSupported: ++
UsbMsFn!STORE_IsCommandSupported: command 0x23
UsbMsFn!STORE_IsCommandSupported: unsupported command 0x23
UsbMsFn!STORE_IsCommandSupported: --
UsbMsFn!BOT_HandleCBW: command not supported
in the mass storage code i found that there was no implementation of the
code for this READ FORMAT CAPACITY command. After this command was not
processed, the endpoint was stalled and the bus was reset by the USB host.
After I hard coded with the READ FORMAT CAPACITY.
there is another problem when i tried to write into the SDMMC card which is
the mass storage device. it is failing to write into that SDMMC. and the
memory property showing the device has zero memory and zero used space( this
is happening when i am trying to write into the mass storage device ).
thanks
.
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