The primary firmware source code for USB HackRF devices is hackrf_usb. Most of
the other directories contain firmware source code for test and development.
The common directory contains source code shared by multiple HackRF firmware
projects. The cpld directory contains HDL source for the CPLD.
The firmware is set up for compilation with the GCC toolchain available here:
https://code.launchpad.net/gcc-arm-embedded
Required dependency:
https://github.com/mossmann/libopencm3
If you are using git, the preferred way to install libopencm3 is to use the
submodule:
$ cd ..
$ git submodule init
$ git submodule update
$ cd firmware/libopencm3
$ make
To build and install a standard firmware image for HackRF One:
$ cd hackrf_usb
$ mkdir build
$ cd build
$ cmake .. -DBOARD=HACKRF_ONE
$ make
$ hackrf_spiflash -w hackrf_usb.bin
If you have a Jawbreaker, use -DBOARD=JAWBREAKER instead.
For loading firmware into RAM with DFU you will also need:
http://dfu-util.gnumonks.org/
To start up HackRF One in DFU mode, hold down the DFU button while powering it
on or while pressing and releasing the RESET button. Release the DFU button
after the 3V3 LED illuminates.
With dfu-util and dfu-suffix (from the dfu-util package) installed and with the
HackRF operating in DFU mode, you can build firmware for RAM and load it with:
$ cd hackrf_usb
$ mkdir build
$ cd build
$ cmake .. -DRUN_FROM=RAM
$ make hackrf_usb-program
Alternatively you can load a .dfu file from a release package with:
$ dfu-util --device 1fc9:000c --alt 0 --download hackrf_usb_ram.dfu
9dbe967bf2