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DfuSe and Windows 7

Question asked by paye.corey on Jan 8, 2016
Latest reply on Jan 8, 2016 by paye.corey
I am trying to get the DfuSe application to work with my STM32 F0 discovery board (running a STM32F051R8T6 micro). 

I am using a Windows 7 x64 OS. 

Essentially my issue is that the Discovery board is not recognized as a DFU device.  The steps I have performed are:

1. Downloaded and installed DfuSe v3.0.5 from STM.  Installation process was fine.
2. I ran the driver installation application for x64.  This appeared to run correctly.
3. Started DfuSe.  Appeared to run fine.
4. Plugged in my Discovery board with it not in DFU mode.  Board was not recognized by DfuSe.  This was expected.
5. I jumpered BOOT0 to Vdd and reset board.  Board is still not recognized by DfuSe.  I could tell from the LED pattern on the board that the micro was not running its usual application so I assume that the micro itself knew it was in DFU mode.
6. I checked the Windows Device Manager.  I see that the board is recognized as a "STMicroelectronics STLink Dongle".  I know from the YouTube video of DfuSe that it should be recognized as a DFU device.
7. I tried uninstalling the device and then re-installing it with it in DFU mode but Windows always gets in there and assigns the default driver (winusb.sys). 
8. I try directing Windows to update the driver to force it to use STTub30.sys.  No luck.  Either I run into the message "The best driver software for your device is already installed." or I am blocked because Windows does not think there is an appropriate driver in the location I direct it to. 

I tried the above with the Discovery board initially in DFU mode on start-up as well.  I also tried an older version (v3.0.3).  Same results. 

I checked my installed software and I see that there are several STMicro drivers installed (see image below).  I am wondering if I should uninstall one or more of them but I am not sure.  I feel like I am missing something basic here.  Any guidance would be greatly appreciated. 

STMDrivers.png

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