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$Id$ USB Mass Storage Device =============================================================================== Copyright (C) 2009 Thorsten Klose (email@example.com) Licensed for personal non-commercial use only. All other rights reserved. =============================================================================== Required tools: -> http://www.ucapps.de/mio32_c.html =============================================================================== Required hardware: o MBHP_CORE_STM32 or MBHP_CORE_LPC17 o a SD Card connected to J16 of the core module Optional hardware: o a LCD to display device status =============================================================================== This application allows to access a connected SD Card via USB by emulating a mass storage device. The USB driver will provide this device once a SD Card is connected. Other USB drivers which were running before (e.g. MIOS32_USB_MIDI or MIOS32_USB_COM) will be bypassed to avoid driver conflicts at the OS side. An enumeration will be triggered as if the USB cable has been re-connected. The (optional) LCD displays the connection status. Once a SD Card has been connected, four characters at the right upper corner inform about the status: o U: USB device ready (e.g. cable connected) o M: SD Card is mounted by OS, resp. is ready for mounting if U not displayed o R: Read access to SD Card o W: Write access to SD Card By removing the SD Card the previously active USB device (e.g. MIOS32_USB_MIDI) will be available again. This means also: if a new application should be uploaded via USB MIDI, the SD Card has to be removed so that the MIDI device is available again. Please note: the USB access is slow compared to the speed you know from common SD Card readers or USB sticks, because the device is accessed with a single serial line and not with a parallel interface. However, transfers are fast enough to upload/download data for MIOS32 applications w/o removing the SD Card from the MBHP_CORE_STM32 module. ===============================================================================