Broadcom BCM283x ================ Raspberry Pi ------------ 1. Prepare an SD or microSD card with a FAT filesystem of at least 30 MB in size. 2. Download the `Raspberry Pi firmware`_ (120 MB), unzip it, and copy the contents of the ``boot/`` folder to your card. 3. Use ``make rpi_defconfig; make`` to build barebox. This will create the following images: - ``images/barebox-raspberry-pi-1.img`` for the BCM2835/ARM1176JZF-S (Raspberry Pi 1) - ``images/barebox-raspberry-pi-2.img`` for the BCM2836/CORTEX-A7 (Raspberry Pi 2) - ``images/barebox-raspberry-pi-3.img`` for the BCM2837/CORTEX-A53 (Raspberry Pi 3, Raspberry Pi Zero) Copy the respective image for your model to your SD card and name it ``barebox.img``. 4. Create a text file ``config.txt`` on the SD card with the following content:: kernel=barebox.img enable_uart=1 (For more information, refer to the `documentation for config.txt`_.) 5. Connect to board's UART (115200 8N1); Use PIN6 (GND), PIN8 (UART_TX), PIN10 (UART_RX) pins. 6. Turn board's power on. .. _Raspberry Pi firmware: https://codeload.github.com/raspberrypi/firmware/zip/80e1fbeb78f9df06701d28c0ed3a3060a3f557ef .. _documentation for config.txt: https://www.raspberrypi.org/documentation/configuration/config-txt/