STM32F411 re-enter into bootloader mode

[Dan S_2]

Posted on April 27, 2017 at 09:58

Hi,

I am doing a firmware upgrade to a STM32F411RE using DfuSe application tool. But after I click ' Leave DFU mode', the MCU re-enters into the bootloader mode. I do not see this problem when I perform the same firmware upgrade on a STM32F401RE chip. Anyone can advise?  Thanks.  

#stm32f411 #dfuse

[Tesla DeLorean]

Posted on April 27, 2017 at 15:27

What is the state of the BOOT0 pin?

Is there a watchdog running?

[Dan S_2]

Posted on April 28, 2017 at 09:32

Hi Clive,

I have connected BOOT0 pin to 3.3V. Watchdog is not active.

In fact, I have reworked a Nucleo board and saw the same behaviour. It re-enters into the bootloader mode after I leave the DFU mode. Attached is the schematic of the Nucleo board that I reworked.

[DUrbano]

Please, could you tell me how did you put your NUCLEO board (with STM32F411) in dfu mode ? I tried with mine, but it was been impossible and I don't really know why...

[VHoti.1]

very simple

connect boot0 and 3.3v and use USB OTG via connect PA12,PA11,GND,3.3V with an USB CABLE to PC

you will see DFU mode on device manager

another variant is DFU file to convert into HEX with ST tools

and to upload HEX via ST-Link Utility ...