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boards: arm64: rpi_4b: Update doc for programming with TF cards

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Rewrote with a more detailed procedure.

Signed-off-by: Chen Xingyu <hi@xingrz.me>
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Chen Xingyu 2023-10-16 14:21:01 +08:00 committed by Carles Cufí
parent 6739063847
commit 03e2b6aee2
1 changed files with 24 additions and 7 deletions
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boards/arm64/rpi_4b/doc/index.rst
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@ -41,14 +41,31 @@ The default configuration can be found in the defconfig file:
Programming and Debugging
*************************
Flashing
========
TF Card
=======
1. Install Raspberry Pi OS using Raspberry Pi Imager. see <https://www.raspberrypi.com/software/>.
Prepare a TF card with MBR and FAT32. In the root directory of the TF card:
2. Add `kernel=zephyr.bin` and `arm_64bit=1` in `config.txt`. see <https://www.raspberrypi.com/documentation/computers/config_txt.html#kernel>
1. Download and place these firmware files:
.. code-block:: console
* `bcm2711-rpi-4-b.dtb <https://raw.githubusercontent.com/raspberrypi/firmware/master/boot/bcm2711-rpi-4-b.dtb>`_
* `bootcode.bin <https://raw.githubusercontent.com/raspberrypi/firmware/master/boot/bootcode.bin>`_
* `start4.elf <https://raw.githubusercontent.com/raspberrypi/firmware/master/boot/start4.elf>`_
*** Booting Zephyr OS build XXXXXXXXXXXX ***
Hello World! Raspberry Pi 4 Model B!
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!