afoliveira-rhx-c1-v1

Zephyr: In-Tree west init + Build/Flash (nsim)

This guide shows how to initialize west directly inside an existing Zephyr
repository clone ("in-tree"), then build and flash the hello_world sample for
Synopsys ARC nSIM (nsim_arc_v/rhx100).

If you prefer the standard multi-repo layout (zephyr + modules in a west
workspace), see the official Getting Started docs. This doc focuses on a
single repo with west initialized in-tree.

Prerequisites

• Zephyr source tree installed
• Zephyr SDK installed (https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v0.17.2/zephyr-sdk-0.17.2_linux-x86_64.tar.xz)
• west installed (https://docs.zephyrproject.org/latest/develop/west/install.html)

Quick Start

1. Export toolchain and base paths (adjust paths for your system):

cd /path/to/zephyr
export ZEPHYR_SDK_INSTALL_DIR=/path/to/zephyr-sdk-0.17.2
export ZEPHYR_BASE=$(pwd)   # run from the Zephyr repo root

2. Initialize west in-tree (once):

# From the Zephyr repo root
west init -l .
west update   # optional: pulls/updates modules per west.yml

Notes:

• west init -l . tells west to use the current directory as the manifest
  (in-tree). It does not move files.
• If west update is used, it will clone/update additional modules into
  modules/ as specified by west.yml.

3. Build the hello_world sample for ARC nSIM:

west build -p -b nsim_arc_v/rhx100 samples/hello_world/

4. Flash (run) with the ARC nSIM runner:

west flash

Expected output includes lines similar to:

-- west flash: using runner arc-nsim
Console now belongs to UART, hit CRTL-] to return to simulator.
Hello World! nsim_arc_v/rhx100
*** Booting Zephyr OS build ... ***

Press Ctrl-] to return from the simulator console, then Ctrl-C to stop
west if needed.