Parallel Programming for Raspberry Pi Compute Module 3/3+/4S

The Raspberry Pi Compute Module 3, 3+, and 4S have become integral components in embedded systems, offering the power of the Raspberry Pi architecture in compact, versatile form factors. Recently, I developed a custom device capable of programming up to 10 Raspberry Pi Compute Modules simultaneously, particularly those equipped with eMMC memory.

This article explains how the custom device works, shares test results, and covers the supported operating systems: Windows 10, macOS, and Ubuntu 24. Using Balena Etcher, it enables effortless and reliable flashing of multiple Raspberry Pi modules at once.

1. Introduction to Raspberry Pi Compute Module 3/3+/4S with eMMC Memory

The Raspberry Pi Compute Module 3, 3+, and 4S offer flexible, compact alternatives to standard Raspberry Pi boards, tailored for embedded and industrial applications. Powered by the BCM2837 (CM3/3+) and BCM2711 (CM4S), these modules with built-in eMMC memory provide better performance and reliability for storage-heavy use cases.

They are designed for seamless integration into custom hardware, empowering developers to create purpose-built devices while leveraging the Raspberry Pi ecosystem.

2. The Custom Device for Simultaneous Programming

The custom device I created can program up to 10 Raspberry Pi Compute Modules at the same time. Designed specifically for modules with eMMC memory, it enables high-speed flashing, making it ideal for large-scale deployments.

Connected to a 10-port USB hub, the device eliminates the need for additional cabling. Each Raspberry Pi Compute Module is flashed independently, ensuring fast and reliable operation without interference.

3. Supported Operating Systems

The custom programming device has been successfully tested on the following operating systems:

• Windows 10: Fully compatible and allows for seamless flashing of Raspberry Pi modules using Balena Etcher.
• macOS: Works smoothly on macOS with a user-friendly experience.
• Ubuntu 24.04: Performs reliably in this Linux environment, achieving 5.2 MB/s when flashing 7 modules simultaneously.

While testing has focused on these systems, the device should work on other modern operating systems as well, including Windows 11 and various Linux distributions, as long as Balena Etcher or a compatible flashing tool is supported.

4. Performance and Reliability

The custom device has proven to be stable and reliable when programming up to 10 Raspberry Pi Compute Modules simultaneously. Each module is flashed independently, allowing for fast, uninterrupted operation.

Testing with Balena Etcher confirmed its robustness. All modules were successfully flashed without errors, even with large or complex images. This proves the device’s capability in high-volume programming tasks.

Future improvements may include speed optimizations and expanded compatibility, but current results already show strong value for both professional and hobbyist embedded system projects.