Hi,
I have used Pro Micro for development which uses COM port for the communication over the USB pins. However I am building a custom circuit to be able to use the USB interface directly so that the board is detected as Atmel USB and not COM port. By default the board comes with Caterina bootloader for Leonardo and I tried the DFU bootloader available on the Microchip’s official website on pro micro however the board is, then, not even detected. So I am not sure if I’m missing something but is there a possibility of doing that using the Pro Micro dev board? (Getting it to be detected as the usb interface). Also according to the pro micro schematic available here: https://cdn.sparkfun.com/datasheets/Dev … o_v13b.pdf , the HWB pin is grounded so the reset vector should always be pointing to the bootloader and not the application, Right?
More Information:
I am using AVR dudes to program the bootloader and fuse required to point the reset vector to bootloader.
DFU bootloader files are available here: http://ww1.microchip.com/downloads/en/D … oaders.zip