Getting FlashFloppy onto the Gotek SFRC922D

These flash floppy emulators from Gotek are great. But they are even better when they have the FlashFloppy firmware loaded.

The SFRC922D model I have seems to have some extra holes under the serial/boot jumpers.

I chose to use the USB/DFU programming method for which you will need a USB A-A cable.

Here's how I put the Gotek into boot mode for DFU:

Jumpers for boot/DFU mode. Wirelinks above the white connector.

Once in boot mode you can program the device using the dfu-util:

I'm using OSX, and used homebrew to install the dfu-util.

brew install dfu-util

dfu-util --list

dfu-util 0.9

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2016 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/

Deducing device DFU version from functional descriptor length
Found Runtime: [05ac:8206] ver=1965, devnum=2, cfg=1, intf=2, path="93-2", alt=0, name="UNKNOWN", serial="UNKNOWN"
Found DFU: [0483:df11] ver=2200, devnum=1, cfg=1, intf=0, path="29-2", alt=1, name="@Option Bytes  /0x1FFFF800/01*016 e", serial="STM32"
Found DFU: [0483:df11] ver=2200, devnum=1, cfg=1, intf=0, path="29-2", alt=0, name="@Internal Flash  /0x08000000/128*002Kg", serial="STM32"

dfu-util -a 0 -s :unprotect:force -D FF_Gotek-v0.9.30a.dfu

dfu-util 0.9

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2016 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/

Match vendor ID from file: 0483
Match product ID from file: df11
Deducing device DFU version from functional descriptor length
Opening DFU capable USB device...
ID 0483:df11
Run-time device DFU version 011a
Claiming USB DFU Interface...
Setting Alternate Setting #0 ...
Determining device status: state = dfuERROR, status = 10
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 011a
Device returned transfer size 2048
DfuSe interface name: "Internal Flash  "

Device disconnects, erases flash and resets now


dfu-util -a 0 -D FF_Gotek-v0.9.30a.dfu

dfu-util 0.9

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2016 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/

Match vendor ID from file: 0483
Match product ID from file: df11
Deducing device DFU version from functional descriptor length
Opening DFU capable USB device...
ID 0483:df11
Run-time device DFU version 011a
Claiming USB DFU Interface...
Setting Alternate Setting #0 ...
Determining device status: state = dfuERROR, status = 10
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 011a
Device returned transfer size 2048
DfuSe interface name: "Internal Flash  "
file contains 1 DFU images
parsing DFU image 1
image for alternate setting 0, (2 elements, total size = 89556)
parsing element 1, address = 0x08000000, size = 26092
Download [=========================] 100%        26092 bytes
Download done.
parsing element 2, address = 0x08008000, size = 63448
Download [=========================] 100%        63448 bytes
Download done.

done parsing DfuSe file