996c252e51
This function conflicts with a function of the same name in mcuboot. This happens when building USB DFU support into mcuboot. DFU over USB uses image manager and mcuboot internals to manage images downloaded to the device. Signed-off-by: Anas Nashif <anas.nashif@intel.com>
111 lines
3.7 KiB
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111 lines
3.7 KiB
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.. _usb_dfu:
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USB DFU Sample Application
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##########################
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Overview
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********
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This sample app demonstrates use of a USB DFU Class driver provided
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by the Zephyr project.
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Requirements
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************
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This project requires an USB device driver. Currently, the USB DFU
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class provided by the Zephyr project depends on DFU image manager and
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partition layout. Refer to :ref:`flash_partitions` for details about
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partition layout. You SoC must run MCUboot as the stage 1 bootloader.
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This sample is built as an application for the MCUboot bootloader.
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Building and Testing
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********************
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Building and signing the application
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====================================
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This sample can be built in the usual way (see :ref:`build_an_application`
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for more details) and flashed with regular flash tools, but will need
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to be loaded at the offset of SLOT-0.
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Application images (such as this sample) must be signed.
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Use the ``scripts/imagetool.py`` script from the `MCUboot GitHub repo`_
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to sign the image. (See the `Using MCUboot with Zephyr`_ documentation for
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details.)
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.. code-block:: console
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~/src/mcuboot/scripts/imgtool.py sign \
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--key ~/src/mcuboot/root-rsa-2048.pem \
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--header-size 0x200 \
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--align 8 \
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--version 1.2 \
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--included-header \
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./zephyr/zephyr.bin \
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signed-zephyr.bin
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Build and flash MCUboot bootloader for Zephyr project as it is described in
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the `Using MCUboot with Zephyr`_ documentation. Then build, sign and flash
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the USB DFU sample at the offset of SLOT-0.
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Build and sign a second application image e.g. :ref:`hello_world`,
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which will be used as an image for the update.
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Do not forget to enable the required MCUboot Kconfig option (as described
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in :ref:`mcuboot`) by adding the following line to
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:file:`samples/hello_world/prj.conf`:
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.. code-block:: console
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CONFIG_BOOTLOADER_MCUBOOT=y
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Testing
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=======
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The Linux ``dfu-util`` tool can be used to backup or update the application
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image.
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Use the following command to backup the SLOT-0 image:
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.. code-block:: console
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dfu-util --alt 0 --upload slot0_backup.bin
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Use the following command to update the application:
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.. code-block:: console
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dfu-util --alt 1 --download signed-hello.bin
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Reset the SoC. MCUboot boot will swap the images and boot the new application,
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showing this output to the console:
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.. code-block:: console
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***** Booting Zephyr OS v1.1.0-65-g4ec7f76 *****
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[MCUBOOT] [INF] main: Starting bootloader
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[MCUBOOT] [INF] boot_status_source: Image 0: magic=unset, copy_done=0xff, image_ok=0xff
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[MCUBOOT] [INF] boot_status_source: Scratch: magic=unset, copy_done=0xe, image_ok=0xff
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[MCUBOOT] [INF] boot_status_source: Boot source: slot 0
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[MCUBOOT] [INF] mcuboot_swap_type: Swap type: test
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[MCUBOOT] [INF] main: Bootloader chainload address offset: 0x20000
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[MCUBOOT] [INF] main: Jumping to the first image slot0
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***** Booting Zephyr OS v1.11.0-830-g9df01813c4 *****
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Hello World! arm
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Reset the SoC again and MCUboot should revert the images and boot
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USB DFU sample, showing this output to the console:
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.. code-block:: console
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***** Booting Zephyr OS v1.1.0-65-g4ec7f76 *****
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[MCUBOOT] [INF] main: Starting bootloader
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[MCUBOOT] [INF] boot_status_source: Image 0: magic=good, copy_done=0x1, image_ok=0xff
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[MCUBOOT] [INF] boot_status_source: Scratch: magic=unset, copy_done=0xe, image_ok=0xff
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[MCUBOOT] [INF] boot_status_source: Boot source: none
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[MCUBOOT] [INF] mcuboot_swap_type: Swap type: revert
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[MCUBOOT] [INF] main: Bootloader chainload address offset: 0x20000
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***** Booting Zephyr OS v1.11.0-830-g9df01813c4 *****
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.. _MCUboot GitHub repo: https://github.com/runtimeco/mcuboot
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.. _Using MCUboot with Zephyr: https://mcuboot.com/mcuboot/readme-zephyr.html
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