How to upload the firmware from a release?

[jmound]

I see in the readme the instructions on compiling and uploading. But there are pre-built releases ready to be used. What's the command for just upgrading the firmware from a pre-compiled release?

Thanks! You all rock!

[emcniece]

Readme says: "On your computer, type make dfu to upload the firmware to the DUO." Make commands get stored in the Makefile so let's see... https://github.com/datomusic/duo-firmware/blob/master/Makefile#L137

dfu: $(TARGET).bin
	@dfu-util -d 1fc9:8189 -D "$<"

So the command looks like it'll be dfu-util -d 1fc9:8189 -D "something". Double-checking the DFU-Util docs:

-d, --device [Run-Time VENDOR]:[Run-Time PRODUCT][,[DFU Mode VENDOR]:[DFU Mode PRODUCT]]
    Specify run-time and/or DFU mode vendor and/or product IDs of the DFU device to work with
...
-D, --download FILE
   Write firmware from FILE into device. When FILE is -, the firmware is read from stdin.

The -D "something" flag is the filename, so that's gotta be $(TARGET).bin. That's probably set somewhere in the Makefile too I'd expect:

# The name of your project (used to name the compiled .hex file)
TARGET = $(notdir $(CURDIR))

That notdir looks a little confusing, I'd have to debug to figure out what it prints, but we probably don't need it. DFU docs sound like you can simply pass a filename.

So the steps would be:

1. Download a release, extract the zip archive
2. cd into that directory
3. Run:

   dfu-util -d 1fc9:8189 -D duo-firmware-1.1.0-rc.5.bin

Of course you'll need to install dfu-util first 👍