Program stmf401re in DFU mode

[DXu]

Hi,

I have custom board for stmf401 and I try to program it in DFU mode. I set the boot0 to 1 and reset the chip but it is not recognized as DFU device. (not listed in the DfuSe).

Do I miss any procedure or settings?

(I have connected the PA11/PA12 pins to the corresponding pins in USB).

Thanks in advance.

Duncan

[Tesla DeLorean · Accepted solution]

App Note AN2606 should provide indications if it is supported.

You'd need an external HSE oscillator, that would need to start, and be at a frequency blessed by the firmware, some STM32 had specific expectations, some not, again check AN2606 for specifics.

[DXu]

Yes, I checked the note and it is supported and It did miss the external HSE oscillator for it.

Thank you very much.