To run Linux and FreeRTOS together on an Avnet RZBoard V2L, build a Yocto Linux image for the board and add the matching Renesas RZ Multi-OS support for a supported multi-core configuration. “Integrated” means Linux and FreeRTOS run on separate processor cores with supported inter-processor communication; it does not mean installing FreeRTOS inside Linux’s root filesystem.
The board identity and software release matter. RZBoard V2L is based on Renesas RZ/V2L, but it is not interchangeable with a similarly named Renesas evaluation board. Start with Avnet’s RZBoard V2L product information and its Linux Yocto Development Guide v2.8; use Renesas package documentation only when its board and release matrix matches your hardware and BSP.
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What “integrated with FreeRTOS” means on RZBoard
The intended design is a multi-OS system: Linux runs on an application processor core, while FreeRTOS runs on a designated real-time core when the specific board and software package support that arrangement. The Renesas RZ Multi-OS Package describes this architecture and inter-processor communication for supported RZ platforms. Its RZ/G2L-family material describes Cortex-A55 for Linux and Cortex-M33 for FreeRTOS or bare metal; this pairing should not be generalized to other RZ families or assumed for a particular RZBoard software release without checking its guide. Renesas RZ Multi-OS Package
This separation affects the whole build: Linux and the real-time firmware have distinct images and configuration, and their memory map and inter-core communication settings must agree. The package layer is not a mechanism for launching a FreeRTOS process from Linux user space.
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Confirm board and release compatibility first
Before creating a build directory or checking out layers, identify the exact RZBoard revision, its RZ/V2L configuration, the Linux BSP release, and the Renesas Multi-OS package release intended for that BSP. A layer existing for Renesas 64-bit Arm MPUs does not prove that a particular Avnet board revision is supported.
- Use Avnet’s RZBoard-specific guide for the machine configuration, baseline Yocto build, boot files, and board procedures. Avnet identifies RZBoard as a board based on RZ/V2L and documents Yocto as a way to build its Linux image and boot files. Avnet RZBoard Linux Yocto Development Guide v2.8
- Check the Renesas Multi-OS guide or release notes for an explicit match to the RZBoard/RZ-V2L target, BSP release, and package revision before adding the feature layer or building FreeRTOS firmware.
- Record the layer revisions, firmware project revision, memory-map configuration, and any board-specific settings together. Do not combine convenient-looking branch heads from different releases.
Renesas’ meta-rz-multi-os repository describes Linux BSP Plus support across several RZ MPU families, including RZ/G2L, RZ/G2LC, RZ/G2UL, RZ/G3S, RZ/T2H, and RZ/N2H. That is repository-level platform coverage, not confirmation that every listed platform is an Avnet RZBoard. Renesas meta-rz-multi-os
Build the Linux baseline with the RZBoard procedure
Use Avnet’s guide as the source of truth for the RZBoard machine target, layer revisions, host prerequisites, image target, boot files, and media-writing process. The guide is versioned, so make sure the instructions you follow correspond to your board and BSP release rather than silently substituting commands for a Renesas kit.
Renesas’ meta-renesas documentation for its scarthgap/rz branch provides useful general context for Yocto layer setup and BitBake or kas workflows. Its documented machine examples include Renesas SMARC and evaluation-kit targets; they are not proof that an Avnet RZBoard machine configuration is present. Use those examples only if the matching Avnet instructions explicitly direct you to them. Renesas meta-renesas scarthgap/rz README
First establish that the unmodified, board-supported Yocto Linux image builds and boots according to the Avnet guide. This provides a known-good baseline before introducing a second OS, and helps distinguish a base BSP issue from a Multi-OS integration mismatch.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Add the matching Multi-OS support and FreeRTOS firmware
Once the board’s Linux baseline and the compatible Renesas release are confirmed, follow the release-specific Renesas quick-start and Avnet board instructions as a single matched procedure. The Renesas package page describes the RZ/G2L, RZ/G2LC, and RZ/G2UL quick-start guide as integrating the Multi-OS package into the RZ/G Verified Linux Package. It does not establish a universal sequence for every board or Yocto release.
- Check the support matrix. Confirm that the package release names the intended RZBoard/RZ-V2L target and the BSP version you have selected.
- Use the documented layer revisions. Add the package’s Yocto feature layer and any required BSP layers exactly as specified for that release. Do not infer a layer URL, branch, or BitBake command from a different board’s example.
- Configure both operating systems as a matched pair. Select the documented real-time core and FreeRTOS project, and align its memory map and inter-processor communication configuration with the Linux-side settings.
- Build and deploy using the board-specific procedure. Follow the guide’s stated image targets and flash or boot steps for the exact release. The applicable command sequence and media instructions must come from the full matching documentation.
- Validate both sides. Check the guide’s prescribed boot and communication checks to confirm Linux and the real-time firmware are running on their assigned cores and can communicate as configured.
Do not treat a successful Linux image build as evidence that FreeRTOS firmware is included, loaded, or communicating. The Linux image, real-time firmware, and board boot configuration must all correspond to the same supported integration.
Diagnose integration mismatches
If the combined system does not behave as expected, narrow the problem by comparing the recorded versions and configuration against the relevant release guide. The available package and repository descriptions establish the supported architecture and software path, but do not specify a single RZBoard diagnostic command or log location that applies across releases.
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- Linux builds or boots, but the real-time OS does not: Recheck that the Multi-OS package release supports the selected board and BSP, then compare firmware project and boot configuration to the board guide.
- The firmware starts but inter-core communication fails: Compare the Linux and FreeRTOS memory-map and communication settings with the matching integration guide. Do not assume that a configuration for another RZ family or evaluation kit is equivalent.
- Instructions name another board: Stop before flashing. Confirm that the machine target, boot files, and storage procedure are explicitly for RZBoard V2L rather than a Renesas SMARC or evaluation kit.
Use the exact logs, diagnostics, and recovery steps named in the guide for your package release; without that match, a generic flash or boot recipe could damage the working baseline or obscure the cause.
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