# Installation Guide

## Prerequisites

Install required tools:

```bash
python -m venv venv
source venv/bin/activate
pip install west pyserial pyocd
```

## Project Structure

```
zephyr/
├── venv/                   # Python virtual environment
├── sdk/zephyr/             # Zephyr source code
├── zephyr-sdk-1.0.1/       # Zephyr SDK installation
├── chill/                  # This project
└── env.sh                  # Environment setup script
```

## Setup

### 1. Clone Zephyr SDK

```bash
# in zephyr/
mkdir sdk
cd sdk
git clone https://github.com/zephyrproject-rtos/zephyr.git
```

### 2. Install Zephyr SDK

```bash
# in zephyr/
wget https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v1.0.1/zephyr-sdk-1.0.1_linux-x86_64_gnu.tar.xz
tar xf zephyr-sdk-1.0.1_linux-x86_64_gnu.tar.xz
```

### 3. Initialize West

```bash
# in zephyr/sdk/zephyr
west init -l .
west update
```

### 4. Export a Zephyr CMake package.

```bash
# in zephyr/sdk/zephyr
west zephyr-export
```

### 5. Install Python dependencies using west packages.

```bash
# in zephyr/sdk/zephyr
west packages pip --install
```

### 6. Create env.sh

Create `zephyr/env.sh` with the following content:

```bash
#!/bin/bash

SCRIPT_DIR=$(dirname "$(readlink -f "$0")")

export ZEPHYR_BASE="${SCRIPT_DIR}/sdk/zephyr"
echo "export ZEPHYR_BASE=\"${SCRIPT_DIR}/sdk/zephyr\""

export ZEPHYR_SDK_INSTALL_DIR="${SCRIPT_DIR}/zephyr-sdk-1.0.1"
echo "export ZEPHYR_SDK_INSTALL_DIR=\"${SCRIPT_DIR}/zephyr-sdk-1.0.1\""

source "${SCRIPT_DIR}/venv/bin/activate"
echo "source \"${SCRIPT_DIR}/venv/bin/activate\""
```