# Software

Describes the application processor and low-power processor directory structure.

To design and manage the APIs, it’s necessary to understand the organization of APIs in the code and the relationships, functions, and operations of the source code directory files.

## Application processor directory structure

The QSH-exposed APIs are called QSH client APIs for application
development. The following information shows the QSH client API
tree structure and the location of each software component.

The source code for QSH client APIs is in
`<workspace>/build-qcom-wayland/workspace/sources/sensinghub/sensing-hub`
directory.

├───/sources/sensinghub/sensing-hub
    │
    ├───apis                          - APIs
    │   └───proto                     - Proto API
    │       └───google
    │           └───protobuf
    │
    ├───common                        - Common header file
    │   └───inc
    │
    ├───examples
    │   └───SessionClient             - Sample 1 source file
    │
    └───session                       - Client APIs source and header files
        └───1.0
            ├───inc
            └───src
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Note

To view and customize the source code, see the [Qualcomm Linux Yocto Guide](https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-27). The sensing-hub source is available at `<workspace>/build-qcom-wayland/workspace/sources/sensinghub/sensing-hub/`.

## Low-power processor directory structure

The QSH software stack consists of the framework, API, sensor driver,
and algorithm components. This information is available to licensed users with authorized access. For more information, see
[Software](https://docs.qualcomm.com/bundle/resource/topics/80-70020-7A/software.html)
in [Qualcomm Linux Sensors Guide -
Addendum](https://docs.qualcomm.com/bundle/resource/topics/80-70020-7A/overview.html).

Note

[Qualcomm Linux Sensors Guide - Addendum](https://docs.qualcomm.com/bundle/resource/topics/80-70020-7A/overview.html) is accessible only to the licensed users with authorized access.

Next steps

- [Bring up sensors](https://docs.qualcomm.com/doc/80-70020-7/topic/bringup_sensors.html#bringup-sensors)

Last Published: Jun 26, 2025

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