# Run-time Update

## eIQ Neutron-S targets

### Neutron Runtime Components

The neutron runtime for the eIQ Neutron-S targets (e.g. iMX95, iMX943) consists of the following files:

- **Neutron firmware**: `NeutronFirmware.elf`
- **Neutron driver**: `libNeutronDriver.so`
- **TensorFlow neutron delegate**: `libneutron_delegate.so`

### Updating the Neutron Runtime

To update the neutron runtime on a target device, upload the files to their designated directories, as follows:

| File                     | Target Directory |
|--------------------------|------------------|
| `NeutronFirmware.elf`    | `/lib/firmware/` |
| `libNeutronDriver.so`    | `/lib/`          |
| `libneutron_delegate.so` | `/lib/`          |

```{important}
Please back up the existing files on the target before updating!
```

## eIQ Neutron-C targets

### Neutron Runtime Components

- The neutron runtime headers and libraries for the eIQ Neutron targets (e.g. iMXRT700) consists of the following
  files:
    - **Neutron errors C header**: `NeutronErrors.h`
    - **Neutron driver C header**: `NeutronDriver.h`
    - **Neutron firmware library**: `libNeutronFirmware.a`
    - **Neutron driver library**: `libNeutronDriver.a`

### Updating the Neutron Runtime

#### MCU SDK ≥ 25.12.00

| Source File                                                         | Destination Path                                                                |
|---------------------------------------------------------------------|---------------------------------------------------------------------------------|
| `<Neutron_SDK_path>/target/imxrt700/common/include/NeutronErrors.h` | `<MCU_SDK_path>/mcuxsdk/middleware/eiq/neutron/common/include/NeutronErrors.h`  |
| `<Neutron_SDK_path>/target/imxrt700/driver/include/NeutronDriver.h` | `<MCU_SDK_path>/mcuxsdk/middleware/eiq/neutron/driver/include/NeutronDriver.h`  |
| `<Neutron_SDK_path>/target/imxrt700/board/libNeutronDriver.a`       | `<MCU_SDK_path>/mcuxsdk/middleware/eiq/neutron/rt700/cm33/libNeutronDriver.a`   |
| `<Neutron_SDK_path>/target/imxrt700/board/libNeutronFirmware.a`     | `<MCU_SDK_path>/mcuxsdk/middleware/eiq/neutron/rt700/cm33/libNeutronFirmware.a` |

#### MCU SDK < 25.12.00

| Source File                                                         | Destination Path                                                                                   |
|---------------------------------------------------------------------|----------------------------------------------------------------------------------------------------|
| `<Neutron_SDK_path>/target/imxrt700/common/include/NeutronErrors.h` | `<MCU_SDK_path>/middleware/eiq/tensorflow-lite/third_party/neutron/common/include/NeutronErrors.h` |
| `<Neutron_SDK_path>/target/imxrt700/driver/include/NeutronDriver.h` | `<MCU_SDK_path>/middleware/eiq/tensorflow-lite/third_party/neutron/driver/include/NeutronDriver.h` |
| `<Neutron_SDK_path>/target/imxrt700/board/libNeutronDriver.a`       | `<MCU_SDK_path>/middleware/eiq/tensorflow-lite/third_party/neutron/rt700/libNeutronDriver.a`       |
| `<Neutron_SDK_path>/target/imxrt700/board/libNeutronFirmware.a`     | `<MCU_SDK_path>/middleware/eiq/tensorflow-lite/third_party/neutron/rt700/libNeutronFirmware.a`     |