Arduino for STM32

I understand that it works - I just cant like the error message :)

When you say "Btw, the serial port what the flasher looks for is the USB serial.", what USB serial do you mean?

Is this about compatibility with other HID bootloaders beside the STM32F1 and STM32F4?

Sorry to bang on about this ...

If, in the Arduino IDE, I select an attached serial device - here an FTDI adaptor not connected to the target - then I get this output while updating:

+-----------------------------------------------------------------------+
| HID-Flash v2.2.1 - STM32 HID Bootloader Flash Tool |
| (c) 2018 - Bruno ...

My problem is not with the bootloader on the STM32F411, it is with the hid-flash utility.

It is that which expects to find a serial port.

fpiSTM is correct in that the utility should handle the error better.

I think that the real issue lies further up the chain somewhere in the Arduino setup ...

hi

I used the samveen derivative of the serasidis bootloader so that it will run on the WeAct STM32F411 BlackPill:

https://github.com/samveen/STM32_HID_Bootloader

I flashed that to the WeAct STM32F411 board, set up the Arduino IDE for "HID Bootloader 2.2" and the appropriate board settings.

The ...