2. android-sdk usage

ArmSoM provides SDKs for Linux and Android for all its products. These SDKs are usually hosted on GitHub. This guide takes ArmSoM-CM5-IO as an example to show how to obtain and compile the SDK firmware. Refer to the SDK repository README. The SDK is released as split compressed packages via GitHub Releases, and all the following commands are executed on a Linux development host.

2.1 Download the SDK

Open the rk3576_Android14RKR6 release and expand Assets. Download all 56 SDK parts, from rk3576_Android14RKR6.tar.bz2.aa through rk3576_Android14RKR6.tar.bz2.cd, into the same directory. Keep the original filenames.

tip

Download the split archive assets. The automatically generated Source code (zip) and Source code (tar.gz) archives do not replace the SDK.

2.2 Extract the SDK

In the directory containing all downloaded parts, concatenate and extract them:

cat rk3576_Android14RKR6.tar.bz2.* | tar xj

Use .* to include the .a*, .b*, and .c* parts. Using only .a* would omit later parts and cause extraction to fail.

Enter the extracted SDK root. The README uses the following directory name; replace it if the actual extracted directory has a different name:

cd rk3576_android14

2.3 Configure the target board

The SDK contains common RK3576 code. Select the matching board target during build configuration.

The README also describes applying CM5IO patches. If your SDK version requires a separate CM5IO patch set, obtain matching patches and apply them from the SDK root:

git am /path/to/your/patches/*.patch

Replace /path/to/your/patches/ with the actual patch directory. The release linked above currently contains only SDK archive parts, with no separate patch attachments. If you need these patches, contact ArmSoM through the SDK forum.

2.4 Build the SDK

From the SDK root, initialize the build environment and open the target selection menu:

source build/envsetup.sh
lunch

For CM5IO, select its userdebug target. For another board, select the corresponding target. Then run the build command provided in the README:

./build.sh -AUKup

2.5 Troubleshooting

• If extraction fails, check that all 56 parts from the same release have fully downloaded and that the command includes every part.
• If applying patches fails, check that the patches match the SDK version and board.
• If the build fails, keep the error output and selected lunch target, then search for known issues or ask for help on the SDK forum.

For updated SDK releases and instructions, refer to the repository README and Releases page.