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Overview

boards/raspberrypi/rpi_4b/doc/index.rst

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.. zephyr:board:: rpi_4b

Overview

The Raspberry Pi 4_ is the fourth generation of the Raspberry Pi flagship series of single-board computers. It is based on the Broadcom BCM2711 SoC which features a quad-core 64-bit ARM Cortex-A72 CPU and is available in 1, 2, 4 or 8 GB of LPDDR4 RAM.

Hardware

  • Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ 1.8GHz
  • 1GB, 2GB, 4GB or 8GB LPDDR4-3200 SDRAM (depending on model)
  • 2.4 GHz and 5.0 GHz IEEE 802.11ac wireless, Bluetooth 5.0, BLE
  • Gigabit Ethernet
  • 2 USB 3.0 ports; 2 USB 2.0 ports.
  • Raspberry Pi standard 40 pin GPIO header (fully backwards compatible with previous boards)
  • 2 × micro-HDMI® ports (up to 4kp60 supported)
  • 2-lane MIPI DSI display port
  • 2-lane MIPI CSI camera port
  • 4-pole stereo audio and composite video port
  • H.265 (4kp60 decode), H264 (1080p60 decode, 1080p30 encode)
  • OpenGL ES 3.1, Vulkan 1.0
  • Micro-SD card slot for loading operating system and data storage
  • 5V DC via USB-C connector (minimum 3A)
  • 5V DC via GPIO header (minimum 3A)
  • Power over Ethernet (PoE) enabled (requires separate PoE HAT)

Supported Features

.. zephyr:board-supported-hw::

Programming and Debugging

.. zephyr:board-supported-runners::

TF Card

Prepare a TF card with MBR and FAT32. In the root directory of the TF card:

  1. Download and place these firmware files:

    • bcm2711-rpi-4-b.dtb <https://raw.githubusercontent.com/raspberrypi/firmware/master/boot/bcm2711-rpi-4-b.dtb>_
    • start4.elf <https://raw.githubusercontent.com/raspberrypi/firmware/master/boot/start4.elf>_
    • fixup4.dat <https://raw.githubusercontent.com/raspberrypi/firmware/master/boot/fixup4.dat>_

  2. Copy build/zephyr/zephyr.bin

  3. Create a config.txt:

    .. code-block:: text

    kernel=zephyr.bin arm_64bit=1 enable_uart=1 uart_2ndstage=1

Insert the card and power on the board. You should see the following output on the serial console (GPIO 14/15):

.. code-block:: text

*** Booting Zephyr OS build XXXXXXXXXXXX *** Hello World! Raspberry Pi 4 Model B!

References

.. target-notes::

.. _Raspberry Pi 4: https://pip.raspberrypi.com/documents/RP-008344-DS-raspberry-pi-4-product-brief.pdf/

.. _Raspberry Pi 4 Schematic: https://datasheets.raspberrypi.com/rpi4/raspberry-pi-4-reduced-schematics.pdf