Placing Arduino Micro in DFU Mode

Other Hardware 3rd Party Boards
1

Hello all, I have been attempting to place the arduino micro in to DFU mode with the intent to flash a custom firmware. I seem to be having some issues. I have shorted the reset pin and gnd on the ICSP header but the atmega32u4 simply reboots in to a normal state. It is still recognized as Arduino Micro in the device manager. I was reading somewhere that it should appear as atmega32u4 in the device manager when it is in DFU mode. Any help in putting the chip in to DFU mode would be greatly appreciated.
-- Scott

2

No such thing, there is no DFU mode on the 32U4 used in the Micro and Leonardo. They use the Caterina bootloader. All you need to do is upload your own custom program. There is nothing to replace unless you want to get rid of the bootloader.

Only the ATmega16U2 or 8U2 have the DFU bootloader. The DFU bootloader is mainly to upload the serial USB communication code used for the Uno/Mega. serial communication.

3

there is then no way to use hiduino in any board other than uno and mega?

4

camilozk:
there is then no way to use hiduino in any board other than uno and mega?

HIDUINO takes advantage of Arduino boards where a second AVR chip is used as the USB controller, so it won't work with single chip variants (e.g. Leonardo), nor older boards that use an FTDI chip as USB controller (e.g. Duemilanove). Many cheap Arduino knockoffs that pretend to be an Uno or Mega also might not work, since they tend to use the (slighly) cheaper FTDI chips.

5

scotte_27182:
Hello all, I have been attempting to place the arduino micro in to DFU mode with the intent to flash a custom firmware.

See: How Do I Reinstall the Bootloader? ... near bottom of page

6

It annoys me that these CH340 boards are advertised as a "UNO" when they basically in no way whatsoever resemble a UNO.

The defining feature of a UNO is the 16U2 (or 8U2) chip. If this is not present, then by definition it is a Duemilanove clone. Not a UNO, nothing like a UNO.

The R3 included the op-amp buffer for the pin 13 LED (a ridiculously obvious enhancement) but the previous model did not, so that is not a distinctive factor. What bootloader is installed is arbitrary.

No, a UNO us a UNO and with either a FT232 or a CH340, it cannot be a UNO.

7

thanks guys for the information