60 lines
2.2 KiB
ReStructuredText
60 lines
2.2 KiB
ReStructuredText
.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
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Flashing Images Using ``bmaptool``
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**********************************
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A fast and easy way to flash an image to a bootable device is to use
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Bmaptool, which is integrated into the OpenEmbedded build system.
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Bmaptool is a generic tool that creates a file's block map (bmap) and
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then uses that map to copy the file. As compared to traditional tools
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such as dd or cp, Bmaptool can copy (or flash) large files like raw
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system image files much faster.
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.. note::
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- If you are using Ubuntu or Debian distributions, you can install
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the ``bmap-tools`` package using the following command and then
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use the tool without specifying ``PATH`` even from the root
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account::
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$ sudo apt install bmap-tools
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- If you are unable to install the ``bmap-tools`` package, you will
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need to build Bmaptool before using it. Use the following command::
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$ bitbake bmap-tools-native
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Following, is an example that shows how to flash a Wic image. Realize
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that while this example uses a Wic image, you can use Bmaptool to flash
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any type of image. Use these steps to flash an image using Bmaptool:
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#. *Update your local.conf File:* You need to have the following set
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in your ``local.conf`` file before building your image::
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IMAGE_FSTYPES += "wic wic.bmap"
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#. *Get Your Image:* Either have your image ready (pre-built with the
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:term:`IMAGE_FSTYPES`
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setting previously mentioned) or take the step to build the image::
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$ bitbake image
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#. *Flash the Device:* Flash the device with the image by using Bmaptool
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depending on your particular setup. The following commands assume the
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image resides in the :term:`Build Directory`'s ``deploy/images/`` area:
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- If you have write access to the media, use this command form::
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$ oe-run-native bmap-tools-native bmaptool copy build-directory/tmp/deploy/images/machine/image.wic /dev/sdX
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- If you do not have write access to the media, set your permissions
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first and then use the same command form::
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$ sudo chmod 666 /dev/sdX
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$ oe-run-native bmap-tools-native bmaptool copy build-directory/tmp/deploy/images/machine/image.wic /dev/sdX
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For help on the ``bmaptool`` command, use the following command::
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$ bmaptool --help
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