STEVAL-MKI109V3 DfuSe update issue, no available DFU Device

[Chris0815]

Hello,

I installed the latest driver version Unico 8.0.0. Now my board is shown in the decive manager.

Ready to use.. Everything looks good.

Now I am trying to update the FW in the STEVAL-MKI109V3 board.

First I pressed the BT2 Button and pluged the USB into the Laptop(Win7 and Win10).

The blue LED (D6) is on, but there is no available DFU Device in the DfuSe Demo (v3.0.5).

I noticed that, when I unplug the device and replug it without pressing the BT2 button, the LED (D1) no longer blinking as it did before. As if I was stuck in DFU mode.

If I press the BT3 vor reset the LED (D1) is on for half a second.

does anyone have any idea what this could be or how I can update the FW?

Best regards,

Chris

[Chris0815]

maybe it will help.

[Chris0815 · Accepted solution]

Problem solved!

It was an Driver issue. The trick was that it wasn't the normal COM driver, but the bootloader, which is the driver used in DFU mode. This can only be seen in the device manager when the DFU mode is active. When I reinstalled this driver it worked fine.

Thanks to st Support!