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# Ethos-u
This is the root repository for all Ethos-u software. It is provided to help
users download required repositories and place them in a tree structure.
```
$ ./fetch_externals.py
```
The script will build following tree structure.
```
Directory Repository
. https://review.mlplatform.org/admin/repos/ml/ethos-u/ethos-u
+-- core_software https://review.mlplatform.org/admin/repos/ml/ethos-u/ethos-u-core-driver
| +-- core_driver https://review.mlplatform.org/admin/repos/ml/ethos-u/ethos-u-core-software
| +-- cmsis GitHub
| +-- tensorflow GitHub
+-- vela https://review.mlplatform.org/admin/repos/ml/ethos-u/ethos-u-vela
```
| Directory | Description |
--- | ---
| . | This is the root directory for all Ethos-u software. |
| core_software | The software executing on Arm Cortex-M is referred to as _Core Software_. This folder provides a small build system that illustrates how to build the key components for the Ethos-u core software. |
| cmsis | CMSIS provides optimized kernels and generic interfaces to the Arm Cortex-M CPUs. |
| tensorflow | The TensorFlowLite micro framework is used to run inferences. |
| vela | The Vela optimizer takes a TFLu file as input and replaces operators that are supported by the Ethos-u NPU with custom operators designed to run on the NPU. Operators not supported by the NPU are executed in software. |
|
